CH137631A - Process for the preparation of 2,6-dichloro-1,3-dimethylbenzene-4-sulfonic acid. - Google Patents

Process for the preparation of 2,6-dichloro-1,3-dimethylbenzene-4-sulfonic acid.

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Publication number
CH137631A
CH137631A CH137631DA CH137631A CH 137631 A CH137631 A CH 137631A CH 137631D A CH137631D A CH 137631DA CH 137631 A CH137631 A CH 137631A
Authority
CH
Switzerland
Prior art keywords
dimethylbenzene
dichloro
sulfonic acid
preparation
solution
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 CH137631A publication Critical patent/CH137631A/en

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Description

  

      Verfahren    zur     Darstellung    von 2     #        6-Dichlor-1        #        3-diinethylbenzol-4-snlfosänre.       Vorliegendes Patent bezieht sich auf ein       Verfahren        zur        Darstellung    von 2.     6-Dichlor-          1.    '3 -     dimethylbenzol    - 4 -     :

  sulfosäure,    dadurch  gekennzeichnet, dass man<B>1.</B>     3-Dimethylben-          zol-4-sulfosäure    in mineralsaurer Lösung mit  einem     Chlarierungsmittel        in    solchen Mengen  behandelt, dass die dem     Eintritt    von 2 Ato  men Chlor in das Molekül der     SuMosäure     entsprechende Menge verbraucht wird.

   Die       Dichlor    - 1. 3 -     @dimethylbenzal    - 4 -     sulfosäure          kristallisiert    aus     Wasser    in weissen, glänzen  den     Blättchen.        Ihr        Amid        schmilzt    bei etwa  <B>330',</B> wie in den Berichten der deutschen  chemischen     Gesellschaft,    Band 23,     ,Seite    2326,       beschrieben    ist.

   Sie     sohl    als Zwischenpro  dukt zur     Herstellung    von     Farbstoffen        ver-          wendet    werden.  



       Beispiel:     1.45 Teile Chlor werden langsam bei 90    unter Rühren in eine Lösung von 220 Teilen       1.3-Dim-ethylbenzol-4-sulfosäure    in<B>1000</B>  Teilen Wasser unter     Zusatz    von 10 Teilen       Eisenchlorid        -eingeleitet.    Dann wird die Lö  sung abgekühlt     und    mit     -ungefähr        230    Teilen       Natronlauge    von 33 % teilweise     neutralisiert.  



      Process for the preparation of 2 # 6-dichloro-1 # 3-diinethylbenzene-4-snifosane. The present patent relates to a process for the preparation of 2. 6-dichloro-1. '3-dimethylbenzene-4 -:

  sulfonic acid, characterized in that <B> 1. </B> 3-dimethylbenzene-4-sulfonic acid in a mineral acid solution is treated with a chlorinating agent in such amounts that the entry of 2 atoms of chlorine into the molecule of the sulfonic acid corresponding amount is consumed.

   The dichloro - 1. 3 - @dimethylbenzal - 4 - sulfonic acid crystallizes from water in white, shiny leaves. Their amide melts at about <B> 330 ', </B> as is described in the reports of the German chemical society, volume 23, page 2326.

   It is intended to be used as an intermediate product in the manufacture of dyes.



       Example: 1.45 parts of chlorine are slowly introduced at 90 ° with stirring into a solution of 220 parts of 1,3-dimethylbenzene-4-sulfonic acid in 1000 parts of water with the addition of 10 parts of iron chloride. The solution is then cooled and partially neutralized with approximately 230 parts of 33% sodium hydroxide solution.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 2. 6-Di- ehlor-l..3-d!imethylbenzol-4-suüfosä-ure, da durch gekennzeichnet, dass man 1.3-Dime- thylbenzol-4-sulfosäure in mineralsaurer. Lö sung mit einem Chlorierungsmittel in, solchen Mengen behandelt, dass die dem Eintritt von 2 Atomen Chlor in das Molekül der Sulfo= säure entsprechende Menge verbraucht wird. PATENT CLAIM: Process for the preparation of 2. 6-dichloro-1..3-d! Imethylbenzene-4-suüfosä-ure, characterized in that 1,3-dimethylbenzene-4-sulfonic acid is converted into mineral acid. The solution is treated with a chlorinating agent in such amounts that the amount corresponding to the entry of 2 atoms of chlorine into the sulfo acid molecule is consumed. Die Dichlor-l. 3-dimethylbenzol-4-sulfosäure kristallisiert aus Wasser in weissen, glän zenden Blättchen. Ihr Amid schmilzt bei etwa <B>330'.</B> Sie soll als Zwischenprodukt zur Herstellung von Farbstoffen verwendet wer den. The dichloro l. 3-dimethylbenzene-4-sulfonic acid crystallizes from water in white, shiny flakes. Its amide melts at around <B> 330 '. </B> It is said to be used as an intermediate in the manufacture of dyes. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reaktion unter Zusatz eines Katalysators vor sich gehen lä.sst. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the reaction is allowed to proceed with the addition of a catalyst.
CH137631D 1927-03-12 1928-03-09 Process for the preparation of 2,6-dichloro-1,3-dimethylbenzene-4-sulfonic acid. CH137631A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE137631X 1927-03-12
CH135473T 1928-03-09

Publications (1)

Publication Number Publication Date
CH137631A true CH137631A (en) 1930-01-15

Family

ID=25712492

Family Applications (1)

Application Number Title Priority Date Filing Date
CH137631D CH137631A (en) 1927-03-12 1928-03-09 Process for the preparation of 2,6-dichloro-1,3-dimethylbenzene-4-sulfonic acid.

Country Status (1)

Country Link
CH (1) CH137631A (en)

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