CH140309A - Process for the preparation of a strong, durable diazo compound. - Google Patents

Process for the preparation of a strong, durable diazo compound.

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Publication number
CH140309A
CH140309A CH140309DA CH140309A CH 140309 A CH140309 A CH 140309A CH 140309D A CH140309D A CH 140309DA CH 140309 A CH140309 A CH 140309A
Authority
CH
Switzerland
Prior art keywords
durable
preparation
diazo compound
strong
diazo
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Kalle Co
Original Assignee
Kalle & Co 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 Kalle & Co Ag filed Critical Kalle & Co Ag
Publication of CH140309A publication Critical patent/CH140309A/en

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

Description

  

  Verfahren zur Darstellung einer festen, haltbaren     Diazoverbindung.       Gegenstand der vorliegenden Erfindung       it    ein Verfahren zur Darstellung einer fe  sten, haltbaren     Diazoverbindung,    darin be  stehend, dass man eine Lösung von     diazotier-          tem        m-Nitroanilin    mit     Cadmiumchlorid    ver  setzt. Das Endprodukt stellt ein     gelblichwei-          sses,    kristallines, haltbares, in Wasser     lösli-          ehes    Pulver dar, welches zur Herstellung von       Azofarbstoffen    Verwendung findet.  



  <I>Beispiel:</I>  In eine aus<B>138</B> Teilen     m-Nitroanilin,    625  Teilen 15     öiger    Salzsäure und 70 Teilen Na  triumnitrit dargestellte     Diazolösung    werden  125 Teile kristallisiertes     Cadmiumchlorid     eingetragen. Die     Diazoverbindung    scheidet  sich alsbald als     Cadmiumdoppelsalz    aus. Die       Abscheidung    kann durch Zusatz von Koch  salz vervollständigt werden. Das     Diazosalz     wird     abfiltriert    und in üblicher Weise fertig  gemacht.

   Es stellt ein     gelblichweisses,    kristal  lines, haltbares, in Wasser lösliches Pulver    dar, welches zur Herstellung von     Azofarb-          stoffen    Verwendung findet.



  Process for the preparation of a strong, durable diazo compound. The present invention relates to a process for the preparation of a solid, durable diazo compound, which consists in setting a solution of diazotized m-nitroaniline with cadmium chloride. The end product is a yellowish-white, crystalline, durable, water-soluble powder which is used for the production of azo dyes.



  <I> Example: </I> 125 parts of crystallized cadmium chloride are introduced into a diazo solution made from <B> 138 </B> parts of m-nitroaniline, 625 parts of 15% hydrochloric acid and 70 parts of sodium nitrite. The diazo compound is soon separated out as a cadmium double salt. The separation can be completed by adding common salt. The diazo salt is filtered off and made ready in the usual way.

   It is a yellowish-white, crystalline, durable, water-soluble powder which is used for the production of azo dyes.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung einer festen, haltbaren Diazoverbindung folgender Kon- stitution: EMI0001.0029 dadurch gekennzeichnet, dass man eine Lö sung von diazotiertem m-Nitroanilin mit Cadmiumchlorid versetzt. Das Endprodukt stellt ein gelblichweisses, kristallines, haltbares, in Wasser lösliches Pulver dar, welches zur Herstellung von Azofarbstoffen Verwendung findet. PATENT CLAIM: Process for the preparation of a solid, durable diazo compound of the following constitution: EMI0001.0029 characterized in that cadmium chloride is added to a solution of diazotized m-nitroaniline. The end product is a yellowish-white, crystalline, durable, water-soluble powder, which is used for the production of azo dyes.
CH140309D 1927-07-21 1928-07-19 Process for the preparation of a strong, durable diazo compound. CH140309A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE140309X 1927-07-21
CH138596T 1928-07-19

Publications (1)

Publication Number Publication Date
CH140309A true CH140309A (en) 1930-05-31

Family

ID=25713195

Family Applications (1)

Application Number Title Priority Date Filing Date
CH140309D CH140309A (en) 1927-07-21 1928-07-19 Process for the preparation of a strong, durable diazo compound.

Country Status (1)

Country Link
CH (1) CH140309A (en)

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