DE551255C - Process for the preparation of aromatic amines - Google Patents
Process for the preparation of aromatic aminesInfo
- Publication number
- DE551255C DE551255C DE1930551255D DE551255DD DE551255C DE 551255 C DE551255 C DE 551255C DE 1930551255 D DE1930551255 D DE 1930551255D DE 551255D D DE551255D D DE 551255DD DE 551255 C DE551255 C DE 551255C
- Authority
- DE
- Germany
- Prior art keywords
- aromatic amines
- preparation
- iron
- phosphoric acid
- reduction
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/22—Compounds of iron
- C09C1/24—Oxides of iron
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung aromatischer Amine In den Patentschriften .163 773 und d6.1. 561 sind Verfahren beschrieben, mit deren Hilfe es gelingt, bei der Herstellung aromatischer Amine durch Reduktion der entsprechenden N itrov erbindttngen mit Eisen und Säure oder mit Eisen und hydralysierbaren Metallsalzen das anfallende Eiseno@ydulolyd in einer besonders wertvollen, zur Herstellung von Farben hervorragend geeigneten Form zu gewinnen.Process for the preparation of aromatic amines In the patents .163 773 and d6.1. 561 processes are described with the help of which it is possible, in the production of aromatic amines, by reducing the corresponding nitro compounds with iron and acid or with iron and hydrolyzable metal salts, to obtain the ferrous hydroxide in a particularly valuable form that is excellently suited for the production of paints to win.
Wie nun weiter gefunden wurde, beeinflußt bei der Durchführung der Verfahren obengenannter Patentschriften ein Zusatz von Phosphorsäure die Natur der zu gewinnenden Eisenoxydfarben in hohem Grade. Je nach der Menge der zugefügten Phosphorsäure erhält man oxy dulhaltige Eiseno-xy dhydrate von hell- bis dunkelbraunem Farbton.As has now been further found, influenced in the implementation of the Process of the above-mentioned patents an addition of phosphoric acid is the nature of the iron oxide paints to a high degree to be mined. Depending on the amount of added Phosphoric acid gives oxy-duliferous iron oxyhydrates from light to dark brown Hue.
Beispiel Man mischt 12,7 kg einer Eisenchlorürlösung vom spei. Gewicht i,27 mit io kg Phosphorsäure in i5o 1 Wasser, fügt Zoo kg genahlenes Eisen hinzu und läßt bei Siedetemperatur Zoo kg Nitrobenzol einlaufen. Nach Beendigung der Reduktion und Abtrennung des entstandenen Anilins gewinnt man durch Auswaschen und Trocknen des entstandenen Schlammes 25o kg einer Mineralfarbe von schönem dunkelbraunen Ton und ausgezeichneter Deckkraft.Example 12.7 kg of an iron chloride solution are mixed from the spei. Weight 1.27 with 10 kg of phosphoric acid in 150 l of water, adds Zoo kg of ground iron and lets in at the boiling point Zoo kg of nitrobenzene. After the reduction and separation of the aniline formed, 250 kg of a mineral color of a beautiful dark brown tone and excellent covering power are obtained by washing out and drying the resulting sludge.
Verwendet man statt der obengenannten Menge von io kg Phosphorsäure 16 kg, so bildet sich eine wertvolle hellbraune Eiseno@vdfarbe.If one uses instead of the above-mentioned amount of 10 kg of phosphoric acid 16 kg, a valuable light brown Eiseno @ vd color is formed.
Durch Glühen erhält man aus diesen Produkten leuchtend hellrote bis dunkele iolettrote E isenoxydfarben.Glowing gives these products a bright red to dark iolet-red iron oxide colors.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE551255T | 1930-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE551255C true DE551255C (en) | 1932-05-30 |
Family
ID=6562972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930551255D Expired DE551255C (en) | 1930-12-28 | 1930-12-28 | Process for the preparation of aromatic amines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE551255C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0249843A1 (en) * | 1986-06-18 | 1987-12-23 | Bayer Ag | Manufacturing process for black iron oxide pigments having high tinting strength, obtained by the nitrobenzenereduction method |
US5665157A (en) * | 1995-10-26 | 1997-09-09 | Bayer Ag | Clean color shade, yellow-tinged red iron oxide pigments, and a process for their manufacture, and their use |
-
1930
- 1930-12-28 DE DE1930551255D patent/DE551255C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0249843A1 (en) * | 1986-06-18 | 1987-12-23 | Bayer Ag | Manufacturing process for black iron oxide pigments having high tinting strength, obtained by the nitrobenzenereduction method |
US5665157A (en) * | 1995-10-26 | 1997-09-09 | Bayer Ag | Clean color shade, yellow-tinged red iron oxide pigments, and a process for their manufacture, and their use |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE551255C (en) | Process for the preparation of aromatic amines | |
DE551254C (en) | Process for the preparation of aromatic amines | |
DE463773C (en) | Process for the preparation of aromatic amines | |
AT93743B (en) | Process for the production of oils, varnishes, oil varnishes, pastes containing oils and of putties. | |
DE517846C (en) | Process for the production of brown Kuepen dyes of the anthraquinone series | |
DE964085C (en) | Process for the production of sulfur dyes | |
DE651249C (en) | Process for the production of Kuepen dyes | |
DE431943C (en) | Production of blue-green colored lacquers | |
DE508108C (en) | Process for the preparation of Kuepen dyes of the pyranthrone series | |
CH149907A (en) | Process for the preparation of a vat dye. | |
DE456863C (en) | Process for the representation of violet dyes | |
DE641399C (en) | Process for the preparation of bromine derivatives of brominable Kuepen dyes of the anthraquinone series | |
DE523523C (en) | Process for the preparation of 1,2-diaminoanthraquinone | |
DE531014C (en) | Process for the preparation of Kuepen dyes | |
DE427970C (en) | Process for the production of sulfur-containing condensation products | |
DE605937C (en) | Process for the production of Kuepen dyes | |
DE621475C (en) | Process for the production of nitrodibenzanthrones | |
DE647731C (en) | Process for the production of green lead chromate colors from chrome yellow | |
CH102912A (en) | Process for the representation of a blue colored lacquer. | |
CH146187A (en) | Process for the preparation of a vat dye. | |
CH148495A (en) | Process for the separation of an isomeric vat dye mixture. | |
CH210527A (en) | Process for the production of an anthraquinone derivative. | |
CH224885A (en) | Process for the production of a vat dye. | |
CH174078A (en) | Process for the production of a new condensation product. | |
CH145317A (en) | Process for the preparation of an azophthalein dye. |