DE371144C - Process for the production of salts of dioxydichinoyl (rhodizonic acid) - Google Patents

Process for the production of salts of dioxydichinoyl (rhodizonic acid)

Info

Publication number
DE371144C
DE371144C DEF48808D DEF0048808D DE371144C DE 371144 C DE371144 C DE 371144C DE F48808 D DEF48808 D DE F48808D DE F0048808 D DEF0048808 D DE F0048808D DE 371144 C DE371144 C DE 371144C
Authority
DE
Germany
Prior art keywords
dioxydichinoyl
salts
production
rhodizonic acid
acid
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
Application number
DEF48808D
Other languages
German (de)
Inventor
Dr Benno Homolka
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Priority to DEF48808D priority Critical patent/DE371144C/en
Application granted granted Critical
Publication of DE371144C publication Critical patent/DE371144C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/587—Unsaturated compounds containing a keto groups being part of a ring
    • C07C49/703—Unsaturated compounds containing a keto groups being part of a ring containing hydroxy groups
    • C07C49/713—Unsaturated compounds containing a keto groups being part of a ring containing hydroxy groups a keto group being part of a six-membered ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von Salzen des Dioxydichinoyls (Rhodizonsäure). Es wurde gefunden, daß bei der Einwirkung von neutralen Salzen der schwefeligen Säure auf Glyoxal in wäßriger Lösung die entsprechenden Salze des Dioxydichinoyls, der sogenannten »Rhodizonsäure«, entstehen.Process for the preparation of salts of dioxydichinoyl (rhodizonic acid). It has been found that when neutral salts act, the sulphurous Acid on glyoxal in aqueous solution the corresponding salts of dioxydichinoyl, the so-called »rhodizonic acid«.

Diese sollen zur Herstellung von Farbstoffen Verwendung finden.These should be used for the production of dyes.

Unter Glyoxal ist hier zu verstehen sowohl (las monomolekulare Glyoxal als auch seine Polymer isationsprodukte.Under glyoxal is to be understood here both (as monomolecular glyoxal as well as its polymerization products.

Beispiel. Zu einer kaltgesättigten Lösung von 5oo Gewichtsteilen kristallisiertem Natriumsulfit fügt man unter Umrühren auf einmal hinzu 5o Gewichtsteile Glyoxal, zweckmäßig in Form einer etwa 3oprozentigen wäßrigen Lösung. Die Mischung erwärmt sich sofort sehr stark, färbt sich unter begieriger Aufnahme von Luftsauerstoff tief gelb und scheidet alsbald das Dinatriumsalz des Dioxydichinoyls (rhodizonsaures Natrium) in Form schwarzvioletter Kristalle aus. Man unterstützt die Reaktion durch Erwärmen und Umrühren oder durch Einblasen von Luft; sie ist beendet, sobald eine abfiltrierte Probe bei weiterer Einwirkung der Luft keinen Niederschlag mehr abscheidet.Example. To a cold, saturated solution of 500 parts by weight of crystallized sodium sulfite , 50 parts by weight of glyoxal are added all at once with stirring, expediently in the form of an approximately 3% aqueous solution. The mixture immediately heats up very strongly, turns deep yellow with eager absorption of atmospheric oxygen and immediately separates the disodium salt of dioxydichinoyl (sodium rhodizonate) in the form of black-violet crystals. The reaction is supported by heating and stirring or by blowing in air; it is ended as soon as a filtered sample no longer separates any precipitate on further exposure to the air.

Das so gewonnene rhodizonsaure Natrium wird nun auf ein Filter gebracht, mit kaltem Wasser gewaschen und getrocknet. Es zeigt die von J. U. L e r e h (Annalen 124, 2o bis 12)undvonR.NietzkiundTh.Benckis e r (Berichte 18, r886] S. 507 und 1837) angegebenen Eigenschaften. Bei Anwendung von Kaliumsulfit an Stelle von Natriumsulfit erhält man das Kaliumsalz der Rhodizonsäure, welches dem Natriumsalz in allen Stücken gleicht.The rhodizonic acid sodium obtained in this way is now placed on a filter, washed with cold water and dried. It shows the by J. U. L e r e h (Annalen 124, 2o to 12) and by R. NietzkiundTh.Benckis e r (Reports 18, r886] p. 507 and 1837) specified properties. When using potassium sulfite instead of sodium sulfite the potassium salt of rhodizonic acid is obtained, which is the same as the sodium salt in all its pieces equals.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Salzen des Dioxydichinoyls (Rhodizonsäure), gekennzeichnet durch die Einwirkung von neutralen Sulfiten auf Glyoxal.PATENT CLAIM: Process for the production of salts of dioxydichinoyl (Rhodizonic acid), characterized by the action of neutral sulfites Glyoxal.
DEF48808D 1921-03-11 1921-03-11 Process for the production of salts of dioxydichinoyl (rhodizonic acid) Expired DE371144C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF48808D DE371144C (en) 1921-03-11 1921-03-11 Process for the production of salts of dioxydichinoyl (rhodizonic acid)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF48808D DE371144C (en) 1921-03-11 1921-03-11 Process for the production of salts of dioxydichinoyl (rhodizonic acid)

Publications (1)

Publication Number Publication Date
DE371144C true DE371144C (en) 1923-03-12

Family

ID=7102494

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF48808D Expired DE371144C (en) 1921-03-11 1921-03-11 Process for the production of salts of dioxydichinoyl (rhodizonic acid)

Country Status (1)

Country Link
DE (1) DE371144C (en)

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