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CH127947A - Process for the preparation of m-diazophenyl-sulfamic acid. - Google Patents

Process for the preparation of m-diazophenyl-sulfamic acid.

Info

Publication number
CH127947A
CH127947A CH127947DA CH127947A CH 127947 A CH127947 A CH 127947A CH 127947D A CH127947D A CH 127947DA CH 127947 A CH127947 A CH 127947A
Authority
CH
Switzerland
Prior art keywords
preparation
acid
diazophenyl
sulfamic acid
water
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 CH127947A publication Critical patent/CH127947A/en

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

Description

  

  Verfahren zur Darstellung von     m-Diazophenyl-sulfaminsäure.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung von     m-Diazo-          phenylsulfaminsäure,    welches dadurch ge  kennzeichnet ist, dass man     m-Phenylendia-          min    in     Gegenwart    einer tertiären Base mit  einem     sulfierenden    Mittel behandelt und die  so erhaltene     m-Phenylendisulfaminsäure    mit  der für die     Diazotierung    einer     Aminogruppe     erforderlichen Menge salpetriger Säure be  handelt.  



  <I>Beispiel:</I>  500 Gewichtsteile trockenes     Pyridin    wer  den unter Kühlung allmählich mit 130 Ge  wichtsteilen     Chlorsulfonsäure    versetzt; in  die Mischung trägt man bei 25 bis<B>30'</B>  <B>90,5</B> Gewichtsteile neutrales, salzsaures     m-          Phenylendiamin    ein und erwärmt etwa 2  Stunden auf 60 bis<B>70'.</B> Man lässt erkalten  und trägt die Masse in eine Lösung von  250 Gewichtsteilen Soda in<B>700</B> Gewichts  teilen Wasser ein, treibt das     Pyridin    mit  Dampf ab und filtriert die braune Lösung,  welche das     Dinatriumsalz    der     m-Phenylen-          ciisulfa.minsäurP    enthält.

   Die so erhaltene Lö-         sung    wird mit     Salzsäure    gerade sauer ge  macht, alsdann mit 120 Gewichtsteilen Salz  säure von 20'     B4    versetzt und mit einer  Lösung von 35 Gewichtsteilen Natrium bei  0 bis 5       diazotiert.    Die     Diazoverbindung    ist  leicht wasserlöslich, und die so erhaltene Lö  sung kuppelt mit     ss-Naphtol    zu einem was  serlöslichen roten     Azofarbstoff.  



  Process for the preparation of m-diazophenyl-sulfamic acid. The subject of this additional patent is a process for the preparation of m-diazophenylsulfamic acid, which is characterized in that m-phenylenediamine is treated in the presence of a tertiary base with a sulfating agent and the m-phenylenedisulfamic acid thus obtained with that for the diazotization an amino group required amount of nitrous acid be.



  <I> Example: </I> 500 parts by weight of dry pyridine are gradually mixed with 130 parts by weight of chlorosulfonic acid while cooling; Neutral hydrochloric acid m-phenylenediamine is introduced into the mixture at 25 to 30 '' and 90.5 parts by weight and heated to 60 to 70 'for about 2 hours / B> It is allowed to cool and the mass is introduced into a solution of 250 parts by weight of soda in <B> 700 </B> parts by weight of water, the pyridine is driven off with steam and the brown solution, which is the disodium salt of m-phenylene, is filtered off - Contains ciisulfa.minsäurP.

   The solution obtained in this way is made just acidic with hydrochloric acid, then 120 parts by weight of hydrochloric acid of 20 'B4 are added and the mixture is diazotized at 0-5 with a solution of 35 parts by weight of sodium. The diazo compound is readily soluble in water, and the solution thus obtained couples with s-naphthol to form a red azo dye which is soluble in water.

Claims (1)

PATENTANSPRUCR: Verfahren zur Darstellung von m-Diazo- phenylsulfaminsäure, dadurch gekenn zeichnet, dass man m-Phenylendiamin in Gegenwart einer tertiären Base mit einem sulfierenden Mittel behandelt und die so er haltene Phenylendisulfaminsäure mit der für die Diazotierung einer Aminogruppe erfor derlichen Menge salpetriger Säure behandelt. PATENT CLAIM: Process for the preparation of m-diazophenylsulfamic acid, characterized in that m-phenylenediamine is treated in the presence of a tertiary base with a sulfating agent and the phenylenedisulfamic acid obtained in this way is treated with the amount of nitrous acid required for diazotizing an amino group . Die Diazoverbindung ist leicht wasserlöslich und liefert mit ss-Naphtol einen roten, was serlöslichen Azofarbstoff. The diazo compound is easily soluble in water and, together with ss-naphtol, produces a red, which is water-soluble azo dye.
CH127947D 1926-02-22 1927-02-16 Process for the preparation of m-diazophenyl-sulfamic acid. CH127947A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE127947X 1926-02-22
CH126580T 1927-02-16

Publications (1)

Publication Number Publication Date
CH127947A true CH127947A (en) 1928-10-01

Family

ID=25710705

Family Applications (1)

Application Number Title Priority Date Filing Date
CH127947D CH127947A (en) 1926-02-22 1927-02-16 Process for the preparation of m-diazophenyl-sulfamic acid.

Country Status (1)

Country Link
CH (1) CH127947A (en)

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