JPH0747272A - Manufacture of unsaturated nitrile - Google Patents

Manufacture of unsaturated nitrile

Info

Publication number
JPH0747272A
JPH0747272A JP5213542A JP21354293A JPH0747272A JP H0747272 A JPH0747272 A JP H0747272A JP 5213542 A JP5213542 A JP 5213542A JP 21354293 A JP21354293 A JP 21354293A JP H0747272 A JPH0747272 A JP H0747272A
Authority
JP
Japan
Prior art keywords
catalyst
reaction
element selected
methacrylonitrile
isobutylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5213542A
Other languages
Japanese (ja)
Other versions
JP3534431B2 (en
Inventor
Kunitoshi Aoki
圀壽 青木
Satoru Komada
悟 駒田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP21354293A priority Critical patent/JP3534431B2/en
Publication of JPH0747272A publication Critical patent/JPH0747272A/en
Application granted granted Critical
Publication of JP3534431B2 publication Critical patent/JP3534431B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

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  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE:To manufacture acrylnitrile or methacrylonitrile at high yield by using a catalyst which is modified by adding specific metal to a conventional catalyst containing Mo, Bi and iron. CONSTITUTION:Acrylonitrile or methacrylonitrile is manufactured by bringing propyrene or isobutylene into contact with ammonia and oxygen in a gas phase at high temperature in the presence of a catalyst. In this case, the catalyst used consists of 40 to 60wt.% silica that carries the composition shown by the formula (Q is at least one kind of element selected from Cr and In; A is at least one kind of element selected from K, Rb and Cs; E is at least one kind of element selected from Mn, Mg, Zn, Ce, Na And P; (m), (b), (f), (n), (q), (a), (l) and (x) indicate atomic ratios; m=10 to 14, b=0.1 to 3, f=0.1 to 3, n=4 to 10, q=0.1 to 2, a=0.01 to 0.5, 1=0 to 3; and (x) is the atomic ratio oxygen corresponding to the oxide of a metal component in the composition).

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、モリブデン、ビスマ
ス、鉄を含む多重促進酸化物触媒の存在下に、プロピレ
ンまたはイソブチレンをアンモニアおよび酸素と気相接
触させてアクリロニトリルまたはメタクリロニトリルを
製造する方法に関する。
The present invention relates to a method for producing acrylonitrile or methacrylonitrile by vapor-phase contacting propylene or isobutylene with ammonia and oxygen in the presence of a multipromoting oxide catalyst containing molybdenum, bismuth and iron. Regarding

【0002】[0002]

【従来の技術】プロピレンまたはイソブチレンをアンモ
ニアの存在下に分子状酸素によって気相酸化してアクリ
ロニトリルまたはメタクリロニトリルを製造する方法
は、「アンモ酸化プロセス」として広く知られ、現在工
業的規模で実施されている。この反応に使用されるモリ
ブデン、ビスマス、鉄を含む多数の触媒が発表されてい
る。例えば、特開平2−59046号公報、特開平2−
251250号公報、特公昭40−2532号公報、特
公昭50−15773号公報、特公昭51−6649号
公報、特公昭52−45692号公報、特公昭59−5
0667号公報、特公昭60−36812号公報、特公
昭62−42654号公報、米国特許第4,167,4
94号、米国特許第5,039,299号などに、いわ
ゆるモリブデン、ビスマス、鉄を含む多成分酸化物触媒
が開示されている。
2. Description of the Related Art A method for producing acrylonitrile or methacrylonitrile by gas phase oxidation of propylene or isobutylene with molecular oxygen in the presence of ammonia is widely known as "ammoxidation process" and is currently carried out on an industrial scale. Has been done. Numerous catalysts have been announced, including molybdenum, bismuth and iron used in this reaction. For example, JP-A-2-59046 and JP-A-2-59046
No. 251250, Japanese Patent Publication No. 40-2532, Japanese Patent Publication No. 5015773, Japanese Patent Publication No. 51-6649, Japanese Patent Publication No. 52-45692, Japanese Patent Publication No. 59-5.
No. 0667, Japanese Patent Publication No. 60-36812, Japanese Patent Publication No. 62-42654, and U.S. Pat. No. 4,167,4.
No. 94, US Pat. No. 5,039,299 and the like disclose multi-component oxide catalysts containing so-called molybdenum, bismuth and iron.

【0003】これらは種々の利点を有する優れた触媒で
あるが、アンモ酸化の副反応の抑制が不十分であり、目
的生成物の収率は未だ満足すべきものではない。
These are excellent catalysts having various advantages, but the side reaction of ammoxidation is not sufficiently suppressed, and the yield of the target product is not yet satisfactory.

【0004】[0004]

【発明が解決しようとする課題】本発明の目的は、上記
の従来触媒を基に改良された触媒を用いて、より高い収
率でアクリロニトリルまたはメタクリロニトリルを製造
する方法を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing acrylonitrile or methacrylonitrile in a higher yield by using an improved catalyst based on the above conventional catalyst. .

【0005】[0005]

【課題を解決するための手段】本発明方法の主たる要件
は触媒にある。本発明者は、プロピレンまたはイソブチ
レンのアンモ酸化反応に用いるモリブデン、ビスマス、
鉄を含有する触媒を鋭意検討した結果、これらの成分と
さらに特定の金属成分を複合した酸化物が、アクリロニ
トリルまたはメタクリロニトリルの収率を一層向上させ
ることを見出し、本発明を完成するに至った。
The main requirement of the process according to the invention lies in the catalyst. The present inventor has proposed molybdenum, bismuth, which is used for the ammoxidation reaction of propylene or isobutylene,
As a result of diligent examination of iron-containing catalysts, it was found that an oxide in which these components and further a specific metal component were combined further improved the yield of acrylonitrile or methacrylonitrile, and the present invention was completed. It was

【0006】本発明の触媒は、一般組成式The catalyst of the present invention has a general compositional formula.

【0007】[0007]

【化2】 (式中、Qはクロムおよびインジウムの中から選ばれる
少なくとも1種の元素、Aはカリウム、ルジビウムおよ
びセシウムの中から選ばれる少なくとも一種の元素、E
はマンガン、マグネシウム、亜鉛、セリウム、ナトリウ
ムおよびリンの中から選ばれる少なくとも一種の元素で
あり、m、b、f、n、q、a、eおよびxはそれぞれ
モリブデン、ビスマス、鉄、ニッケル、成分Q、成分
A、成分Eおよび酸素の原子比を表わし、m=10〜1
4、好ましくは11〜13、b=0.1〜3、好ましく
は0.3〜2、f=0.1〜3、好ましくは0.5〜
2.5、n=4〜10、好ましくは5〜9、q=0.1
〜2、好ましくは0.2〜1.5、a=0.01〜0.
5、好ましくは0.1〜0.4、e=0〜3、xは組成
式中の金属成分の原子価を満足する酸素の原子比であ
る。)で示される組成物を40〜60重量%のシリカに
担持させたものである。
[Chemical 2] (In the formula, Q is at least one element selected from chromium and indium, A is at least one element selected from potassium, rudibium, and cesium, E
Is at least one element selected from manganese, magnesium, zinc, cerium, sodium and phosphorus, and m, b, f, n, q, a, e and x are molybdenum, bismuth, iron, nickel and components, respectively. Represents the atomic ratio of Q, component A, component E and oxygen, m = 10 to 1
4, preferably 11-13, b = 0.1-3, preferably 0.3-2, f = 0.1-3, preferably 0.5-
2.5, n = 4-10, preferably 5-9, q = 0.1
~ 2, preferably 0.2 to 1.5, a = 0.01 to 0.
5, preferably 0.1 to 0.4, e = 0 to 3, and x is an atomic ratio of oxygen satisfying the valence of the metal component in the composition formula. ) The composition represented by (4) is supported on 40 to 60% by weight of silica.

【0008】本発明の触媒は、効果的な作用および特性
を得るために不可欠の成分Qを含有することを特徴とす
る。成分Qのクロムとインジウムを混合して用いる場合
は、それぞれ単独で用いる場合よりも優れたアクリロニ
トリルまたはメタクリロニトリルの収率が得られる。ク
ロムを単独で用いる場合は、qが1を越えないことが望
ましい。また、成分Qの量は鉄に対する相対含量、すな
わち、q/(q+f)が0.7以下になるように決定す
ることが望ましい。
The catalyst of the present invention is characterized in that it contains the essential component Q in order to obtain effective action and properties. When chromium and indium of the component Q are used as a mixture, a yield of acrylonitrile or methacrylonitrile which is superior to the case where they are used alone is obtained. When chromium is used alone, it is desirable that q does not exceed 1. Further, it is desirable to determine the amount of the component Q so that the relative content with respect to iron, that is, q / (q + f) is 0.7 or less.

【0009】本発明の触媒において微量ではあるが不可
欠の成分Aは、プロピレンまたはイソブチレンからのア
クリロニトリルまたはメタクリロニトリルへの選択率を
向上させる。成分Aの中ではルビジウムまたはセシウム
を単独で用いる場合は、カリウムよりも少ない量でアク
リロニトリルまたはメタクリロニトリルの選択率を向上
させる。成分Aは本発明の量範囲を越えて用いる場合
は、プロピレンまたはイソブチレンの反応活性を減じ
る。
Ingredient A, although present in trace amounts in the catalyst of the present invention, improves the selectivity of propylene or isobutylene to acrylonitrile or methacrylonitrile. In the component A, when rubidium or cesium is used alone, it improves the selectivity of acrylonitrile or methacrylonitrile in an amount smaller than that of potassium. Component A reduces the reaction activity of propylene or isobutylene when used in excess of the amount range of the invention.

【0010】任意成分Cは反応活性、触媒物性などの調
整のために適宜選択して用いることができる。成分Cの
リンは、触媒の耐摩耗性を向上させる場合がある。
The optional component C can be appropriately selected and used in order to adjust the reaction activity and the physical properties of the catalyst. The component C phosphorus may improve the wear resistance of the catalyst.

【0011】シリカは触媒の担体である。本発明のシリ
カ担持された触媒は、流動層アンモ酸化反応において優
れた流動性を有する。シリカの使用量が40重量%以上
で優れた耐摩耗性が得られる。しかし、60重量%を越
えて用いる場合は、触媒成分が稀釈され、十分な活性が
得られないばかりでなく、大きく選択率も減少する。本
発明の触媒は、先ず原料混合スラリーを調製し、次いで
該スラリーを噴霧乾燥し、最後に該乾燥品を焼成すると
いう三つの工程を経て好適に製造することができる。
Silica is a catalyst carrier. The silica-supported catalyst of the present invention has excellent fluidity in a fluidized bed ammoxidation reaction. When the amount of silica used is 40% by weight or more, excellent wear resistance can be obtained. However, when it is used in an amount of more than 60% by weight, not only is the catalyst component diluted, sufficient activity is not obtained, but the selectivity is also greatly reduced. The catalyst of the present invention can be suitably produced through three steps of first preparing a raw material mixed slurry, then spray drying the slurry, and finally calcining the dried product.

【0012】本発明の触媒の各成分は、水または硝酸に
可溶な塩の形で用いることが望ましい。モリブデン源と
しては、七モリブデン酸アンモニウムを用いることがで
きる。ビスマス、鉄、ニッケル、クロム、インジウム、
マンガン、マグネシウム、亜鉛、セリウムおよびナトリ
ウム源としては、それぞれの硝酸塩を用いることができ
る。リン源としてはリン酸、そして、シリカ源としては
シリカゾルが好適である。用いるシリカゾルは、できる
だけアルミニウム含量の少ない高純度であることが望ま
しい。
Each component of the catalyst of the present invention is preferably used in the form of a salt soluble in water or nitric acid. As the molybdenum source, ammonium heptamolybdate can be used. Bismuth, iron, nickel, chromium, indium,
As the manganese, magnesium, zinc, cerium and sodium sources, respective nitrates can be used. Phosphoric acid is preferable as the phosphorus source, and silica sol is preferable as the silica source. It is desirable that the silica sol used is of high purity with as little aluminum content as possible.

【0013】原料料混合スラリーの調製は、先ずシリカ
ゾルに攪拌しながらリン酸を、次い七モリブデン酸アン
モニウムの水溶液を加え、最後にその他の成分の硝酸塩
の混合液を加えることによって、好適に行なうことがで
きる。ここに得られる原料混合スラリーのpHは、通常
2以下である。このとき優れた物性を有する触媒が得ら
れる。ここに得られる原料混合スラリーのpHは、通常
2以下である。このとき、優れた物性を有する触媒が得
られる。原料混合スラリーを噴霧乾燥することによって
流動層反応に適した球形微粒子を得ることができる。
The raw material mixed slurry is preferably prepared by first adding phosphoric acid to the silica sol while stirring, then adding an aqueous solution of ammonium heptamolybdate, and finally adding a mixed solution of nitrates of other components. be able to. The pH of the raw material mixed slurry obtained here is usually 2 or less. At this time, a catalyst having excellent physical properties can be obtained. The pH of the raw material mixed slurry obtained here is usually 2 or less. At this time, a catalyst having excellent physical properties is obtained. By spray-drying the raw material mixed slurry, spherical fine particles suitable for fluidized bed reaction can be obtained.

【0014】噴霧乾燥粒子は焼成の前に脱硝処理するこ
とが望ましい。脱硝処理は350〜450℃で0.5〜
2.0時間熱処理することによって行なうことができ
る。脱硝処理品は最後に500〜650℃、好ましくは
550〜630℃にて焼成して触媒を得る。触媒の焼成
温度が低過ぎるとプロピレンまたはイソブチレンの反応
活性は大きいが、アクリロニトリルへの選択率が小さく
なるだけではなく、耐摩耗性も減少する。一方、焼成温
度が高過ぎる場合はプロピレンまたはイソブチレンの反
応活性が減少し、かつ次式によるアンモニアの燃焼が増
大する。
Desirably, the spray-dried particles are subjected to a denitration treatment before firing. Denitration treatment is from 350 to 450 ℃ and 0.5 to
It can be performed by heat treatment for 2.0 hours. Finally, the denitration treated product is calcined at 500 to 650 ° C, preferably 550 to 630 ° C to obtain a catalyst. If the calcination temperature of the catalyst is too low, the reaction activity of propylene or isobutylene is large, but not only the selectivity to acrylonitrile decreases, but also the wear resistance decreases. On the other hand, when the firing temperature is too high, the reaction activity of propylene or isobutylene decreases and the combustion of ammonia according to the following equation increases.

【0015】[0015]

【数1】 本発明の触媒の好適な焼成温度は、上記の500〜65
0℃の範囲から、アンモ酸化反応テストの結果をみて決
定することができる。通常、焼成時間は1〜5時間であ
る。
[Equation 1] The preferable calcination temperature of the catalyst of the present invention is 500 to 65 above.
From the range of 0 ° C, it can be determined by looking at the result of the ammoxidation reaction test. Usually, the firing time is 1 to 5 hours.

【0016】アンモ酸化反応の原料であるプロピレン、
イソブチレンおよびアンモニアは必ずしも高純度である
必要はなく、工業グレードのものを使用することができ
る。ターシャリーブタノールはイソブチレンの代替原料
として好適に用いることができる。酸素源としては通常
空気を用いる。プロピレンまたはイソブチレンに対する
アンモニアと空気の容積比は1:0.9〜1.3:7〜
11、特に1:1.0〜1.2:8〜10の範囲が好ま
しい。
Propylene, which is a raw material for the ammoxidation reaction,
Isobutylene and ammonia do not necessarily need to be highly pure, and industrial grade ones can be used. Tertiary butanol can be suitably used as a substitute raw material for isobutylene. Air is usually used as the oxygen source. The volume ratio of ammonia and air to propylene or isobutylene is 1: 0.9-1.3: 7-
A range of 11, especially 1: 1.0 to 1.2: 8 to 10 is preferable.

【0017】反応温度は400〜460℃、特に410
〜440℃の範囲が好ましい。反応圧力は常圧〜3気圧
の範囲で行なうことができる。原料混合ガスと触媒との
接触時間は1〜8秒、好ましくは2〜6秒である。
The reaction temperature is 400 to 460 ° C., especially 410
The range of ˜440 ° C. is preferable. The reaction pressure can be in the range of atmospheric pressure to 3 atm. The contact time between the raw material mixed gas and the catalyst is 1 to 8 seconds, preferably 2 to 6 seconds.

【0018】[0018]

【実施例】以下、実施例により本発明を更に具体的に説
明する。
The present invention will be described in more detail with reference to the following examples.

【0019】(触媒製造実施例)50重量%のシリカに
担持された下記の組成式を有する触媒1を以下のように
製造した。
(Catalyst Production Example) A catalyst 1 having the following composition formula and supported on 50% by weight of silica was produced as follows.

【0020】[0020]

【化3】 1667gの30%シリカゾルに、水1200gに七モ
リブデン酸アンモニウム〔(NH4 6 Mo7 24・4
2 O〕406.1gを溶解した液を攪拌下に加え、最
後に予め600gの13%硝酸に、55.7gの硝酸ビ
スマス〔Bi(NO3 3 ・5H2 O〕、139.8g
の硝酸第二鉄〔Fe(NO3 3 ・9H2 O〕、41
9.3gの硝酸ニッケル〔Ni(NO3 2 ・6H
2 O〕、46.2gの硝酸クロム〔Cr(NO3 3
9H2 O〕および3.87gの硝酸カリウム〔KN
3 〕を溶解した混合液を加えた。ここに得られた原料
混合液はスラリー状であり、pHは0.3であった。ス
ラリーの噴霧化は乾燥器上部の中央に設置されたところ
の皿型回転子を備えた遠心式噴霧化装置を用いて行なっ
た。乾燥器の入口空気温度を250℃に、そして、出口
温度を130℃に保持してスラリーの噴霧乾燥を行なっ
た。得られた乾燥粉体をキルンに移し、先ず400℃で
1時間脱硝し、次いで560℃で2時間焼成して触媒を
得た。
[Chemical 3] 30% silica sol 1667 g, ammonium heptamolybdate in water 1200g [(NH 4) 6 Mo 7 O 24 · 4
H 2 O] A solution in which 406.1 g was dissolved was added with stirring, and finally, 55.7 g of bismuth nitrate [Bi (NO 3 ) 3 .5H 2 O], 139.8 g was added to 600 g of 13% nitric acid in advance.
Of ferric nitrate [Fe (NO 3) 3 · 9H 2 O ], 41
9.3g of nickel nitrate [Ni (NO 3) 2 · 6H
2 O], 46.2 g of chromium nitrate [Cr (NO 3 ) 3 ·
9H 2 O] and 3.87 g of potassium nitrate [KN
A mixed solution in which O 3 ] was dissolved was added. The raw material mixed solution obtained here was in the form of a slurry and had a pH of 0.3. Atomization of the slurry was performed using a centrifugal atomizer equipped with a dish rotor installed in the center of the upper part of the dryer. The slurry was spray dried by keeping the inlet air temperature of the dryer at 250 ° C and the outlet temperature at 130 ° C. The obtained dry powder was transferred to a kiln, first denitrated at 400 ° C. for 1 hour, and then calcined at 560 ° C. for 2 hours to obtain a catalyst.

【0021】上記と同様の方法により表1記載の組成を
有する触媒2〜11と比較触媒1と2を製造した。これ
らの触媒の製造に当って、Mo、Bi、Fe、Ni、C
r、KおよびSiO2 源として触媒1と同じ原料を用い
た。触媒成分にインジウム、ルビジウム、セシウム、マ
ンガン、マグネシウム、亜鉛、セリウム、ナトリウム、
リンが含まれる場合は、それぞれインジウム〔In(N
3 3 ・3H2 O〕、硝酸ルビジウム〔RbN
3 〕、硝酸セシウム〔CsNO3 〕、硝酸マンガン
〔Mn(NO3 2 ・6H2 O〕、硝酸マグネシウム
〔Mg(NO3 2 ・6H2 O〕、硝酸亜鉛〔Zn(N
3 2 ・6H2 O〕、硝酸セリウム〔Ce(NO3
3 ・6H2 O〕、硝酸ナトリウム〔NaNO3 〕、リン
酸〔H3 PO4 〕を用いた。これらの触媒の焼成は、そ
れぞれ表1記載の温度で行なった。
Catalysts 2 to 11 having the composition shown in Table 1 and comparative catalysts 1 and 2 were produced by the same method as described above. In the production of these catalysts, Mo, Bi, Fe, Ni, C
The same raw materials as in Catalyst 1 were used as the r, K and SiO 2 sources. The catalyst component is indium, rubidium, cesium, manganese, magnesium, zinc, cerium, sodium,
When phosphorus is contained, indium [In (N
O 3) 3 · 3H 2 O], rubidium nitrate [RbN
O 3], cesium nitrate [CsNO 3], manganese nitrate [Mn (NO 3) 2 · 6H 2 O ], magnesium nitrate [Mg (NO 3) 2 · 6H 2 O ], zinc nitrate [Zn (N
O 3) 2 · 6H 2 O], cerium nitrate [Ce (NO 3)
3 · 6H 2 O], sodium nitrate [NaNO 3], using phosphoric acid [H 3 PO 4]. The calcination of these catalysts was performed at the temperatures shown in Table 1, respectively.

【0022】[0022]

【表1】 (プロピレンのアンモ酸化反応実施例)10メッシュの
金網を1cm間隔で12枚内蔵した内径25mmのバイ
コールガラス流動層反応管に50ccの触媒1をとり、
反応温度435℃、反応圧力常圧下に、プロピレン9容
積%の混合ガス(プロピレン:アンモニア:酸素:ヘリ
ウムの容積比が1:1.2:1.85:7.06)を毎
秒3.50cc(NTP換算)の流速で通過させた。こ
の反応の結果を下記式で定義されるプロピレン転化率、
アクリロニトリル選択率およびアクリロニトリル収率の
3つの指標によって評価し、それらの値を表2に記載し
た。
[Table 1] (Example of ammoxidation reaction of propylene) 50 cc of catalyst 1 was placed in a Vycor glass fluidized bed reaction tube having an inner diameter of 25 mm and containing 12 pieces of 10-mesh wire mesh at 1 cm intervals.
At a reaction temperature of 435 ° C. and a reaction pressure of normal pressure, a mixed gas of propylene 9% by volume (volume ratio of propylene: ammonia: oxygen: helium 1: 1.2: 1.85: 7.06) was applied at 3.50 cc / s. It was passed at a flow rate of NTP conversion). The result of this reaction is the propylene conversion rate defined by the following formula,
Acrylonitrile selectivity and acrylonitrile yield were evaluated by three indexes, and those values are shown in Table 2.

【0023】[0023]

【数2】 触媒2、3、4、6、7、8、9および10、そして、
比較触媒1と2について上と同様の反応を行なった。こ
れらの反応は、原料混合ガスのプロピレンを9容積%、
プロピレンに対するアンモニアの容積比を1:1.2に
固定し、プロピレンに対する酸素の容積比を1.8〜
1.9の範囲から適宜選択して行なった。また、各触媒
のプロピレン反応活性に応じて、反応温度および次式で
定義される接触時間を適宜変更した。各触媒の反応条件
および反応成績を表2に示す。
[Equation 2] Catalysts 2, 3, 4, 6, 7, 8, 9 and 10, and
Comparative catalysts 1 and 2 were subjected to the same reaction as above. In these reactions, 9% by volume of propylene, which is a raw material mixed gas,
The volume ratio of ammonia to propylene is fixed at 1: 1.2, and the volume ratio of oxygen to propylene is 1.8 to
It was performed by appropriately selecting from the range of 1.9. Further, the reaction temperature and the contact time defined by the following formula were appropriately changed according to the propylene reaction activity of each catalyst. Table 2 shows the reaction conditions and reaction results of each catalyst.

【0024】[0024]

【数3】 但し、V:触媒量(cc) F:原料混合ガス流量(cc−NTP/sec) T:反応温度(℃)[Equation 3] However, V: catalyst amount (cc) F: raw material mixed gas flow rate (cc-NTP / sec) T: reaction temperature (° C)

【0025】[0025]

【表2】 (イソブチレンのアンモ酸化反応実施例)50ccの触
媒5を上記のプロピレンのアンモ酸化反応に用いた反応
管にとり、反応温度430℃、反応圧力常圧下に、イソ
ブチレン7.5容積%の混合ガス(イソブチレン:アン
モニア:酸素:水:ヘリウム=1:1.2:1.95:
1.8:7.38)を毎秒3.88cc(NTP換算)
の流速で通過させた。この反応の結果をプロピレンの場
合と同様に定義されるイソブチレン転化率、メタクリロ
ニトリル選択率およびメタクリロニトリル収率の3つの
指標によって評価し、それらの値を表3に示した。
[Table 2] (Example of ammoxidation reaction of isobutylene) A 50 cc catalyst 5 was placed in a reaction tube used for the ammoxidation reaction of propylene, and a mixed gas of 7.5% by volume of isobutylene (isobutylene was added at a reaction temperature of 430 ° C. and a normal reaction pressure). : Ammonia: Oxygen: Water: Helium = 1: 1.2: 1.95:
1.8: 7.38) 3.88cc per second (NTP conversion)
At a flow rate of The results of this reaction were evaluated by the three indices of isobutylene conversion, methacrylonitrile selectivity and methacrylonitrile yield, which were defined as in the case of propylene, and those values are shown in Table 3.

【0026】触媒11および比較触媒1について、上と
同様の反応を行なった。各触媒の反応条件および反応成
績を表3に示す。
With respect to the catalyst 11 and the comparative catalyst 1, the same reaction as above was performed. Table 3 shows the reaction conditions and reaction results of each catalyst.

【0027】[0027]

【表3】 [Table 3]

【0028】[0028]

【発明の効果】本発明によれば、プロピレンまたはイソ
ブチレンのアンモ酸化反応に用いるモリブデン、ビスマ
ス、鉄を含有する触媒成分に、さらに特定の金属成分を
複合した酸化物を触媒として用いることにより、アクリ
ロニトリルまたはメタクリロニトリルの収率を一層向上
することができる。
INDUSTRIAL APPLICABILITY According to the present invention, the catalyst component containing molybdenum, bismuth and iron used for the ammoxidation reaction of propylene or isobutylene is further mixed with a specific metal component to form an acrylonitrile. Alternatively, the yield of methacrylonitrile can be further improved.

─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成6年9月5日[Submission date] September 5, 1994

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0002[Name of item to be corrected] 0002

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0002】[0002]

【従来の技術】プロピレンまたはイソブチレンをアンモ
ニアの存在下に分子状酸素によって気相酸化してアクリ
ロニトリルまたはメタクリロニトリルを製造する方法
は、「アンモ酸化プロセス」として広く知られ、現在工
業的規模で実施されている。この反応に使用されるモリ
ブデン、ビスマス、鉄を含む多数の触媒が発表されてい
る。例えば、特開平2−59046号公報、特開平2−
251250号公報、特公昭40−2532号公報、特
公昭50−15773号公報、特公昭51−6649号
公報、特公昭52−45692号公報、特公昭59−5
0667号公報、特公昭60−36812号公報、特公
昭62−42654号公報、米国特許第4,167,4
94号、米国特許第5,093,299号などに、いわ
ゆるモリブデン、ビスマス、鉄を含む多成分酸化物触媒
が開示されている。
2. Description of the Related Art A method for producing acrylonitrile or methacrylonitrile by gas phase oxidation of propylene or isobutylene with molecular oxygen in the presence of ammonia is widely known as "ammoxidation process" and is currently carried out on an industrial scale. Has been done. Numerous catalysts have been announced, including molybdenum, bismuth and iron used in this reaction. For example, JP-A-2-59046 and JP-A-2-59046
No. 251250, Japanese Patent Publication No. 40-2532, Japanese Patent Publication No. 5015773, Japanese Patent Publication No. 51-6649, Japanese Patent Publication No. 52-45692, Japanese Patent Publication No. 59-5.
No. 0667, Japanese Patent Publication No. 60-36812, Japanese Patent Publication No. 62-42654, and U.S. Pat. No. 4,167,4.
No. 94, US Pat. No. 5,093,299 and the like disclose multi-component oxide catalysts containing so-called molybdenum, bismuth and iron.

【手続補正2】[Procedure Amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0013[Correction target item name] 0013

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0013】原料混合スラリーの調製は、先すシリカゾ
ルに攪拌しながらリン酸を、次いで七モリブデン酸アン
モニウムの水溶液を加え、最後にその他の成分の硝酸塩
の混合液を加えることによって、好適に行なうことがで
きる。ここに得られる原料混合スラリーのpHは、通常
2以下である。このとき、優れた物性を有する触媒が得
られる。原料混合スラリーを噴霧乾燥することによって
流動層反応に適した球形微粒子を得ることができる。
The raw material mixed slurry is preferably prepared by adding phosphoric acid to the silica sol while stirring, then adding an aqueous solution of ammonium heptamolybdate, and finally adding a mixed solution of nitrates of other components. You can The pH of the raw material mixed slurry obtained here is usually 2 or less. At this time, a catalyst having excellent physical properties is obtained. By spray-drying the raw material mixed slurry, spherical fine particles suitable for fluidized bed reaction can be obtained.

【手続補正3】[Procedure 3]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0014[Correction target item name] 0014

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0014】噴霧乾燥粒子は焼成の前に脱硝処理するこ
とが望ましい。脱硝処理は350〜450℃で0.5〜
2.0時間熱処理することによって行なうことができ
る。脱硝処理品は最後に500〜650℃、好ましくは
550〜630℃にて焼成して触媒を得る。触媒の焼成
温度が低過ぎるとプロピレンまたはイソブチレンの反応
活性は大きいが、アクリロニトリルまたはメタクリロニ
トリルへの選択率が小さくなるだけではなく、耐摩耗性
も減少する。一方、焼成温度が高過ぎる場合はプロピレ
ンまたはイソブチレンの反応活性が減少し、かつ次式に
よるアンモニアの燃焼が増大する。
Desirably, the spray-dried particles are subjected to a denitration treatment before firing. Denitration treatment is from 350 to 450 ℃ and 0.5 to
It can be performed by heat treatment for 2.0 hours. Finally, the denitration treated product is calcined at 500 to 650 ° C, preferably 550 to 630 ° C to obtain a catalyst. If the calcination temperature of the catalyst is too low, the reaction activity of propylene or isobutylene is high, but the reaction temperature of acrylonitrile or methacrylonitrile is high.
Not only is the selectivity to the trill reduced, but the wear resistance is also reduced. On the other hand, when the firing temperature is too high, the reaction activity of propylene or isobutylene decreases and the combustion of ammonia according to the following equation increases.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 プロピレンまたはイソブチレンを触媒の
存在下アンモニアおよび酸素と高温で気相接触させてア
クリロニトリルまたはメタクリロニトリルを製造するに
当り、次の一般組成式 【化1】 (式中、Moはモリブデン、Biはビスマス、Feは
鉄、Niはニッケル、Qはクロムおよびインジウムの中
から選ばれる少なくとも一種の元素、Aはカリウム、ル
ジビウムおよびセシウムの中から選ばれる少なくとも一
種の元素、Eはマンガン、マグネシウム、亜鉛、セリウ
ム、ナトリウムおよびリンの中から選ばれる少なくとも
一種の元素、Oは酸素であり、m、b、f、n、q、
a、eおよびxは原子比を表わし、m=10〜14、b
=0.1〜3、f=0.1〜3、n=4〜10、q=
0.1〜2、a=0.01〜0.5、e=0〜3、そし
て、xは組成式中の金属成分の酸化物に対応する酸素の
原子比である。)で示される組成物を40〜60重量%
のシリカに担持された触媒を使用することを特徴とする
アクリロニトリルまたはメタクリロニトリルの製造法。
1. In producing acrylonitrile or methacrylonitrile by vapor-phase contacting propylene or isobutylene with ammonia and oxygen in the presence of a catalyst at a high temperature, the following general composition formula: (In the formula, Mo is molybdenum, Bi is bismuth, Fe is iron, Ni is nickel, Q is at least one element selected from chromium and indium, and A is at least one element selected from potassium, rudibium and cesium. An element, E is at least one element selected from manganese, magnesium, zinc, cerium, sodium and phosphorus, O is oxygen, and m, b, f, n, q,
a, e and x represent atomic ratios, m = 10 to 14, b
= 0.1-3, f = 0.1-3, n = 4-10, q =
0.1 to 2, a = 0.01 to 0.5, e = 0 to 3, and x is the atomic ratio of oxygen corresponding to the oxide of the metal component in the composition formula. 40% to 60% by weight of the composition
A method for producing acrylonitrile or methacrylonitrile, which comprises using the catalyst supported on silica according to 1.
【請求項2】 成分Eが亜鉛とセリウムの中から選ばれ
る少なくとも一種の元素である請求項1記載の方法。
2. The method according to claim 1, wherein the component E is at least one element selected from zinc and cerium.
【請求項3】 成分Qがクロムとインジウムの混合物で
ある請求項1記載の方法。
3. The method according to claim 1, wherein the component Q is a mixture of chromium and indium.
JP21354293A 1993-08-06 1993-08-06 Production of unsaturated nitrile Expired - Lifetime JP3534431B2 (en)

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WO1999054037A1 (en) * 1998-04-23 1999-10-28 Mitsubishi Rayon Co., Ltd. Catalyst for producing unsaturated nitrile
CN1063679C (en) * 1997-01-10 2001-03-28 中国石油化工总公司 Fluidized bed catalyst containing halogen for producing acrylonitrile
EP1223162A1 (en) * 1999-10-18 2002-07-17 Mitsubishi Rayon Co., Ltd. Method for producing acrylonitrile, catalyst for use therein and the method for preparing the same
US6458742B1 (en) 2000-08-17 2002-10-01 The Standard Oil Company Catalyst for the manufacture of acrylonitrile
US6479691B1 (en) 1998-04-23 2002-11-12 Mitsubishi Rayon Co., Ltd. Catalyst for producing unsaturated nitrile
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US7348291B2 (en) 2002-12-02 2008-03-25 Ineos Usa Llc Catalyst for the manufacture of acrylonitrile
US7365041B2 (en) 2001-10-11 2008-04-29 Dia-Nitrix Co., Ltd. Method for producing ammoxidation catalyst
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US8258073B2 (en) 2010-03-23 2012-09-04 Ineos Usa Llc Process for preparing improved mixed metal oxide ammoxidation catalysts
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WO1999054037A1 (en) * 1998-04-23 1999-10-28 Mitsubishi Rayon Co., Ltd. Catalyst for producing unsaturated nitrile
US6479691B1 (en) 1998-04-23 2002-11-12 Mitsubishi Rayon Co., Ltd. Catalyst for producing unsaturated nitrile
EP1223162A1 (en) * 1999-10-18 2002-07-17 Mitsubishi Rayon Co., Ltd. Method for producing acrylonitrile, catalyst for use therein and the method for preparing the same
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US6458742B1 (en) 2000-08-17 2002-10-01 The Standard Oil Company Catalyst for the manufacture of acrylonitrile
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US8258073B2 (en) 2010-03-23 2012-09-04 Ineos Usa Llc Process for preparing improved mixed metal oxide ammoxidation catalysts
US8350075B2 (en) 2010-03-23 2013-01-08 Ineos Usa Llc Mixed metal oxide ammoxidation catalysts
US8420566B2 (en) 2010-03-23 2013-04-16 Ineos Usa Llc High efficiency ammoxidation process and mixed metal oxide catalysts
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