CH153689A - Process for the preparation of 4,5-dichloro-2-amino-1-toluene-3-sulfonic acid. - Google Patents

Process for the preparation of 4,5-dichloro-2-amino-1-toluene-3-sulfonic acid.

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Publication number
CH153689A
CH153689A CH153689DA CH153689A CH 153689 A CH153689 A CH 153689A CH 153689D A CH153689D A CH 153689DA CH 153689 A CH153689 A CH 153689A
Authority
CH
Switzerland
Prior art keywords
dichloro
toluene
amino
sulfonic acid
preparation
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 CH153689A publication Critical patent/CH153689A/en

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Description

  

  Verfahren zur Darstellung von     4:.5-Dichlor-2-amino-l-toluol-3-sulfosäure.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung von     4.5-Dichlor-          2-amino-l-toluol-3-sulfosätire,    welches dadurch  gekennzeichnet ist,     dass    man     4.5-Dichlor-2-          amino-l-toluol    mit molekularen Mengen     Ha-          logensulfonsäure,    in Gegenwart eines Ver  dünnungsmittels und unter     Ausschluss    von  jeglicher Feuchtigkeit, behandelt. Die so er  haltene neue     Sulfosäure    soll Verwendung fin  den zur Darstellung von Farbstoffen.  



  <I>Beispiel:</I>  <B>176</B> Gewichtsteile     4.5-Dichlor-2-amino-l-          toluol    werden in     ca.    2000 Gewichtsteilen       ortho-Dichlorbenzol    gelöst. Unter kräftigem  Rühren und unter guter Kühlung tropfen  dazu<B>116,5</B> Gewichtsteile     Chlorsulfonsäure;     man rührt einige Zeit nach und erhitzt dann  langsam auf<B>160-1700 0.</B> Apparatur und  sonstige Arbeitsbedingungen sind dieselben  wie im Beispiel des Hauptpatentes angegeben.

      Die 4.     5-Dichlor-2-amino-l-toluol-3-sulfo-          säure    stellt nach dem Absaugen und Trock  nen ein farbloses Pulver dar, welches in  Wasser schwer, in Soda, das heisst als     Na-          tronsalz,    leicht löslich ist und eine in Wasser       schwerlösliche        Diazoverbindung    ergibt.



  Method for the preparation of 4: .5-dichloro-2-amino-1-toluene-3-sulfonic acid. The subject of this additional patent is a process for the preparation of 4.5-dichloro-2-amino-l-toluene-3-sulfosätire, which is characterized in that 4.5-dichloro-2-amino-l-toluene with molecular amounts of halogen sulfonic acid, treated in the presence of a diluent and with the exclusion of any moisture. The new sulfonic acid obtained in this way is intended to be used to represent dyes.



  <I> Example: </I> <B> 176 </B> parts by weight of 4,5-dichloro-2-amino-l-toluene are dissolved in approx. 2000 parts by weight of ortho-dichlorobenzene. With vigorous stirring and with good cooling, <B> 116.5 </B> parts by weight of chlorosulfonic acid are added dropwise; the mixture is stirred for some time and then slowly heated to <B> 160-1700 0. </B> Apparatus and other working conditions are the same as those given in the example of the main patent.

      The 4. 5-dichloro-2-amino-1-toluene-3-sulfonic acid is a colorless powder after suction and drying, which is difficult to dissolve in water and easily soluble in soda, that is, as the sodium salt and results in a diazo compound which is sparingly soluble in water.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 4.5-Dichlor- 2-amino-l-toluol-3-sulfosäure, dadurch gekenn zeichnet, dass man 4. 5-Dichlor-2-amino-l- toluol mit molekularen Mengen Halogensul- fonsäure in Gegenwart eines Verdünnungs mittels und unter Ausschluss von jeglicher Feuchtigkeit behandelt. Die so erhaltene Säure stellt ein farbloses Pulver dar, welches in Wasser schwer, in Soda leicht löslich ist und eine in Wasser schwerlösliche Diazoverbindung ergibt. PATENT CLAIM: Process for the preparation of 4.5-dichloro-2-amino-l-toluene-3-sulfonic acid, characterized in that 4. 5-dichloro-2-amino-l-toluene with molecular amounts of halosulfonic acid in the presence of a Treated as a diluent and with the exclusion of any moisture. The acid obtained in this way is a colorless powder which is sparingly soluble in water, easily soluble in soda and gives a diazo compound which is sparingly soluble in water. UNTERANSPRüCHE: <B>1.</B> Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als Halogensul- fonsäure Chlorsulfonsäure verwendet. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als Verdünnungs mittel ortho-Dichlorbenzol verwendet. SUBClaims: <B> 1. </B> Process according to patent claim, characterized in that the halosulphonic acid used is chlorosulphonic acid. 2. The method according to claim, characterized in that the diluent used is ortho-dichlorobenzene.
CH153689D 1929-10-24 1930-10-23 Process for the preparation of 4,5-dichloro-2-amino-1-toluene-3-sulfonic acid. CH153689A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE153689X 1929-10-24
CH151675T 1930-10-23

Publications (1)

Publication Number Publication Date
CH153689A true CH153689A (en) 1932-03-31

Family

ID=25715846

Family Applications (1)

Application Number Title Priority Date Filing Date
CH153689D CH153689A (en) 1929-10-24 1930-10-23 Process for the preparation of 4,5-dichloro-2-amino-1-toluene-3-sulfonic acid.

Country Status (1)

Country Link
CH (1) CH153689A (en)

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