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CH127933A - Process for the preparation of a solid diazo salt. - Google Patents

Process for the preparation of a solid diazo salt.

Info

Publication number
CH127933A
CH127933A CH127933DA CH127933A CH 127933 A CH127933 A CH 127933A CH 127933D A CH127933D A CH 127933DA CH 127933 A CH127933 A CH 127933A
Authority
CH
Switzerland
Prior art keywords
diazo salt
preparation
solid
solid diazo
salt
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
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
Publication of CH127933A publication Critical patent/CH127933A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren     zur    Darstellung     eines    festen     Diazosalzes.       Es wurde gefunden, dass man durch Um  setzung von     Diazosalzlösungen    mit freier       p-Chlorbenzolsulfosäure    oder einem ihrer Salze  weisse oder gefärbte feste     Diazosalze    erhält,  die sich durch eine gute     Abscheidbarkeit    bei  genügender Löslichkeit und gute Beständig  keit auszeichnen.

   Zum Beispiel eignen sich  für das Verfahren Lösungen der Salze von       diazotierten        Nitranilinen,        Chlornitranilinen,          Dichloranilinen,    Chlor- und     Nitrotoluidinen,          Nitroaminophenolalkyläthern,    sowie     ortho-          Aminophenolaryläthern.     



  Die neuen so erhaltenen festen     Diazosalze     sind wertvolle Produkte für die Zwecke der  Färberei und Druckerei. Unter Umständen  ist es zweckmässig, ihnen geeignete Verdün  nungsmittel und     Färbereihilfsprodukte    zuzu  setzen.  



  Vorliegendes Patent bezieht sich auf ein  Verfahren zur Darstellung eines festen     Diazo-          salzes    durch Umsetzung einer     Diazosalzlösung     des     2.5-Dichloranilins    mit einem p-chlor-         benzolsulfosauren    Salz oder auch mit freier       p-Chlorbenzolsulfosäure.     



  Das so erhaltene feste     Diazosalz    stellt  ein rötliches und in Wasser lösliches Pulver  dar.  



  <I>Beispiel</I>  Eine     Diazolösung,    hergestellt aus 162  Teilen 2.     5-Dichloranilin,    750 Teilen 15     o/oiger     Salzsäure und 70 Teilen     Natriumnitrit,    wird  mit einer etwa<B>300</B> warmen Lösung von  258 Teilen     p-chlorbenzolsulfosaurem    Natrium  in 840 Teilen Wasser versetzt und kalt  verrührt.  



  Wenn die Umsetzung beendet ist, wird  das ausgeschiedene     Diazosalz        abfiltriert    und  getrocknet.



  Process for the preparation of a solid diazo salt. It has been found that reacting diazo salt solutions with free p-chlorobenzenesulfonic acid or one of its salts gives white or colored solid diazo salts which are characterized by good separability with sufficient solubility and good stability.

   For example, solutions of the salts of diazotized nitroanilines, chloronitranilines, dichloroanilines, chloro- and nitrotoluidines, nitroaminophenol alkyl ethers and ortho-aminophenol aryl ethers are suitable for the process.



  The new solid diazo salts obtained in this way are valuable products for the purposes of dyeing and printing. It may be useful to add suitable diluents and dyeing auxiliaries to them.



  The present patent relates to a method for the preparation of a solid diazo salt by reacting a diazo salt solution of 2,5-dichloroaniline with a p-chlorobenzenesulfonic acid salt or with free p-chlorobenzenesulfonic acid.



  The solid diazo salt obtained in this way is a reddish powder that is soluble in water.



  <I> Example </I> A diazo solution, prepared from 162 parts of 2.5-dichloroaniline, 750 parts of 15% hydrochloric acid and 70 parts of sodium nitrite, is mixed with an approximately <B> 300 </B> warm solution of 258 parts sodium p-chlorobenzenesulfonate is added to 840 parts of water and the mixture is stirred while cold.



  When the reaction has ended, the precipitated diazo salt is filtered off and dried.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines festen Diazosalzes, dadurch gekennzeichnet, dass man eine Diazosalzlösung des 2.5-Dichlor- anilins mit p-Chlorbenzolsulfosäure oder einem ihrer Sülze umsetzt. Das so erhaltene feste Diazosalz stellt ein rötliches und in Wasser lösliches Pulver dar. Claim: Process for the preparation of a solid diazo salt, characterized in that a diazo salt solution of 2.5-dichloro aniline is reacted with p-chlorobenzenesulfonic acid or one of its jellies. The solid diazo salt obtained in this way is a reddish powder that is soluble in water.
CH127933D 1926-02-12 1927-02-11 Process for the preparation of a solid diazo salt. CH127933A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE127933X 1926-02-12
CH126405T 1927-02-11

Publications (1)

Publication Number Publication Date
CH127933A true CH127933A (en) 1928-09-17

Family

ID=25710658

Family Applications (1)

Application Number Title Priority Date Filing Date
CH127933D CH127933A (en) 1926-02-12 1927-02-11 Process for the preparation of a solid diazo salt.

Country Status (1)

Country Link
CH (1) CH127933A (en)

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