AT56110B - Process for the preparation of disazo dyes. - Google Patents

Process for the preparation of disazo dyes.

Info

Publication number
AT56110B
AT56110B AT56110DA AT56110B AT 56110 B AT56110 B AT 56110B AT 56110D A AT56110D A AT 56110DA AT 56110 B AT56110 B AT 56110B
Authority
AT
Austria
Prior art keywords
preparation
dyes
disazo dyes
sulfonic acid
phosgene
Prior art date
Application number
Other languages
German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
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 Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT56110B publication Critical patent/AT56110B/en

Links

Landscapes

  • Coloring (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von Disazofarbstoffen. 



   Durch das Stammpatent Nr. 56109 ist ein Verfahren zur Darstellung von Disazofarbstoffen geschützt, das darin besteht, dass man die Tetrazoverbindung der p. p'-Diamino-   diphenylharnstoff-m.     m'-disulfosäure   des D. R. P. Nr. 140613 entweder in saurer oder neutraler Lösung mit einem Molekül 2.   8-Aminonaphtol-6-sulfosäure   oder ihrer Alkylderivate und mit einem Molekül einer Monosulfosäure des   ss-Naphtylamins   oder seiner Alkylderivate oder mit zwei Molekülen der letztgenannten Komponenten vereinigt. 



   Es wurde nun gefunden, dass man diese Farbstoffe vorteilhaft auch in der Weise herstellen kann, dass man in den Monoazofarbstoffen, die man z. B. aus diazotierter   p-Nitranilin-o-sulfosäure   und den erwähnten Monosulfosäuren des   ss-Naphtytamins   oder seiner Alkylderivate erhält, die Nitrogruppe reduziert und dann die   Aminoazofarbstoffe   mit Phosgen behandelt. Man kann auch von der   Azetyl-p-phenylendiaminsulfosäure   ausgehen, den Monoazofarbstoff verseifen und mit Phosgen behandeln. 



   Beispiel. 



   480 Teile des Natriumsalzes der   p-Amino-o-sulfobenzolazo-ss-methylnaphtylamin-     - 7-sulfosäure werden   bei etwa   40    in 30.000 Teilen Wasser gelöst und dann Phosgen eingeleitet, während man die Lösung schwach alkalisch hält, bis die Aminogruppe nicht mehr durch die Diazoreaktion nachweisbar ist. Der erforderlichenfalls durch Umlösen gereinigte Farbstoff ist identisch mit demjenigen des Beispieles 1 des Stammpatentes. 



   Das Verfahren verläuft in analoger Weise bei Verwendung anderer Azofarbstoffe aus p-Nitranilin-o-sulfosiiure und den betreffenden Naphtalinderivaten. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the preparation of disazo dyes.



   A process for the preparation of disazo dyes is protected by the parent patent No. 56109, which consists in the fact that the tetrazo compound of p. p'-diamino-diphenylurea-m. m'-disulfonic acid of DRP No. 140613 either in acidic or neutral solution with one molecule of 2. 8-aminonaphthol-6-sulfonic acid or its alkyl derivatives and with one molecule of a monosulfonic acid of ss-naphthylamine or its alkyl derivatives or with two molecules of the latter components united.



   It has now been found that these dyes can also advantageously be prepared in such a way that one can use the monoazo dyes that are z. B. obtained from diazotized p-nitroaniline-o-sulfonic acid and the mentioned monosulfonic acids of ss-naphtytamine or its alkyl derivatives, reduced the nitro group and then treated the aminoazo dyes with phosgene. You can also start from acetyl-p-phenylenediaminesulfonic acid, saponify the monoazo dye and treat it with phosgene.



   Example.



   480 parts of the sodium salt of p-amino-o-sulfobenzolazo-ss-methylnaphtylamine- 7-sulfonic acid are dissolved at about 40 in 30,000 parts of water and then phosgene is introduced while the solution is kept slightly alkaline until the amino group is no longer through the Diazo reaction is detectable. The dye, which has been purified by dissolving if necessary, is identical to that of Example 1 of the parent patent.



   The process proceeds in an analogous manner when using other azo dyes made from p-nitroaniline-o-sulfonic acid and the relevant naphthalene derivatives.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Abänderung des durch das Stammpatent Nr. 56109 geschützten Verfahrens zur Darstellung von Diazofarbstoffen aus p. p'-Diaminodiphenylharnstoff-m,m'-disulfosäure, da- durch gekennzeichnet, dass man hier die aus diazotierter p-Nitranilin-o-sulfosäure und den im Stammpatente erwähnten Monosulfosäuren des ss-Naphtylamins und seiner Alkyl- derivate und darauffolgende Reduktion erhältlichen Aniinoazofarbstoffe mit Phosgen be- handelt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Modification of the process for the preparation of disazo dyes protected by the parent patent No. 56109 from p. p'-diaminodiphenylurea-m, m'-disulfonic acid, characterized in that the aminoazo dyes obtainable from diazotized p-nitraniline-o-sulfonic acid and the monosulfonic acids of β-naphthylamine and its alkyl derivatives and subsequent reduction are available here treated with phosgene. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT56110D 1910-08-08 1911-10-12 Process for the preparation of disazo dyes. AT56110B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE56109X 1910-08-08
DE56110X 1910-12-01

Publications (1)

Publication Number Publication Date
AT56110B true AT56110B (en) 1912-11-11

Family

ID=25749237

Family Applications (1)

Application Number Title Priority Date Filing Date
AT56110D AT56110B (en) 1910-08-08 1911-10-12 Process for the preparation of disazo dyes.

Country Status (1)

Country Link
AT (1) AT56110B (en)

Similar Documents

Publication Publication Date Title
CH241824A (en) Process for the preparation of a copper-compatible polyazo dye.
AT56110B (en) Process for the preparation of disazo dyes.
DE241227C (en)
AT73199B (en) Process for the preparation of milled yellow disazo dyes for wool.
AT35833B (en) Process for the preparation of a red disazo dye.
AT65899B (en) Process for the preparation of yellow disazo dyes for cotton.
AT61826B (en) Process for the preparation of disazo dyes.
AT42404B (en) Process for the preparation of a monoazo dye for wool.
AT22661B (en) Process for the preparation of yellow disazo dyes for wool.
AT73548B (en) Process for the preparation of nitrosamines of primary, aromatic amines respectively. their alkali salts.
AT61470B (en) Process for the preparation of black cotton dyes.
AT56178B (en) Process for the production of azo dyes.
AT68096B (en) Process for the preparation of developer dyes.
DE745759C (en) Process for the production of azo dyes
AT47156B (en) Process for the preparation of a purple disazo dye.
DE86198C (en)
AT72940B (en) Process for the preparation of yellow chromating dyes.
AT72939B (en) Process for the production of a paint composition.
AT65098B (en) Process for producing etchable dyeings on cotton.
AT56109B (en) Process for the preparation of disazo dyes.
DE443522C (en) Process for the preparation of related disazo dyes
AT43177B (en) Process for the preparation of o-oxymonoazo dyes.
CH186551A (en) Process for the preparation of an acid dye of the benzidine series.
CH136384A (en) Process for the preparation of an azo dye.
CH106930A (en) Process for the preparation of a monoazo dye.