DE446496C - Process for the production of azo dyes - Google Patents

Process for the production of azo dyes

Info

Publication number
DE446496C
DE446496C DEB118003D DEB0118003D DE446496C DE 446496 C DE446496 C DE 446496C DE B118003 D DEB118003 D DE B118003D DE B0118003 D DEB0118003 D DE B0118003D DE 446496 C DE446496 C DE 446496C
Authority
DE
Germany
Prior art keywords
azo dyes
production
dyes
homologues
salicylic 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
DEB118003D
Other languages
German (de)
Inventor
Dr Fritz Guenther
Dr Josef Hetzer
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEB118003D priority Critical patent/DE446496C/en
Application granted granted Critical
Publication of DE446496C publication Critical patent/DE446496C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/26—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of a diaryl urea

Landscapes

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

Description

Verfahren zur Herstellung von Azofarbstoffen. Es wurde- gefunden, daß man durch Einfüllrung von einer oder mehreren Sulfogruppen in die schwer löslichen Azofarbstoffe aus Diaminodiarylharnstoffen + 2 Mol. Salicy1säure oder ihrer Homologen und Derivate leicht lösliche neue Farbstoffe von wertvollen Eigenschaften erhält. Die neuen Farbstoffe sind besonders dadurch ausgezeichnet, daß sie sich in hervorragender Weise zum Färben von Halbwolle eignen.Process for the production of azo dyes. It was found, that by filling one or more sulfo groups into the sparingly soluble Azo dyes from diaminodiarylureas + 2 mol. Salicic acid or its homologues and derivatives obtain easily soluble new dyes of valuable properties. The new dyes are particularly distinguished by the fact that they are excellent Way suitable for dyeing half wool.

Die Einführung der Sulfogruppen kann in beliebiger Herstellungsstufe erfolgen. Man kann z. B. die genannten Azofarbstoffe in fertiger Form sulfieren. Es ist dabei überraschend, daß dies ohne Aufspaltung in glatter Weise möglich ist.The introduction of the sulfo groups can take place at any stage of preparation take place. You can z. B. sulfate the azo dyes mentioned in finished form. It is surprising that this can be done smoothly without splitting.

Farbstoffe von ähnlich guten Eigenschaften erhält man auch, wenn man von sulfierten Diaminodiarylharnstoffen ausgeht und diese mit 2 '-%Zol. Salicylsäure oder ihrer Homologen und Derivate vereinigt, oder wenn man die Azofarbstoffe aus Nitranilinsulfosäuren und Salicylsäure oder ihrer Homologen und Derivate reduziert und die erhaltenen Aminoazov erbindungen mit Phosgen behandelt.Dyes with similarly good properties can also be obtained if one of sulfated diaminodiarylureas and this with 2 '-% Zol. Salicylic acid or their homologues and derivatives combined, or when you choose the azo dyes Nitranilinsulfonic acids and salicylic acid or their homologues and derivatives reduced and the aminoazov compounds obtained are treated with phosgene.

Beispiel. ro Teile des Disazofarbstoffes aus p # p-Diaminodiphenylharnstoff und 2 Mol. Salicylsäure werden bei gewöhnlicher Temperatur in roo Teile 23prozentiges Oleum unter Rühren eingetragen und während mehrerer Stunden auf etwa 75° erhitzt. Man gießt auf Eis, filtriert den ausgeschiedenen Farbstoff ab, wäscht mit Wasser, nimmt in Sodalösung auf, salzt aus und trocknet.Example. ro parts of the disazo dye from p # p-diaminodiphenylurea and 2 mol. Salicylic acid becomes 23 per cent in roo parts at ordinary temperature Entered oleum with stirring and heated to about 75 ° for several hours. It is poured onto ice, the precipitated dye is filtered off, washed with water, absorbs in soda solution, salting out and drying.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Azofarbstoffen darin bestehend, daß man in die Azofarbstoffe aus Diaminodiarylharnstoffen und 2 Mol. Salicylsäure oder ihrer Homologen und Derivate in beliebiger Herstellungsstufe .Sulfogruppen einführt.PATENT CLAIM: Process for the production of azo dyes therein consisting that in the azo dyes of diaminodiarylureas and 2 mol. Salicylic acid or its homologues and derivatives in any stage of production .Sulfogruppen introduces.
DEB118003D 1925-02-05 1925-02-05 Process for the production of azo dyes Expired DE446496C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB118003D DE446496C (en) 1925-02-05 1925-02-05 Process for the production of azo dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB118003D DE446496C (en) 1925-02-05 1925-02-05 Process for the production of azo dyes

Publications (1)

Publication Number Publication Date
DE446496C true DE446496C (en) 1927-07-02

Family

ID=6994689

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB118003D Expired DE446496C (en) 1925-02-05 1925-02-05 Process for the production of azo dyes

Country Status (1)

Country Link
DE (1) DE446496C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE909242C (en) * 1946-01-14 1954-04-15 Sandoz Ag Process for the preparation of disazo dyes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE909242C (en) * 1946-01-14 1954-04-15 Sandoz Ag Process for the preparation of disazo dyes

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