CH181528A - Process for the production of a new intermediate product. - Google Patents

Process for the production of a new intermediate product.

Info

Publication number
CH181528A
CH181528A CH181528DA CH181528A CH 181528 A CH181528 A CH 181528A CH 181528D A CH181528D A CH 181528DA CH 181528 A CH181528 A CH 181528A
Authority
CH
Switzerland
Prior art keywords
production
intermediate product
new intermediate
new
diamino
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH181528A publication Critical patent/CH181528A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01—Sulfonic acids
    • C07C309/28—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C309/45—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
    • C07C309/51—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton at least one of the nitrogen atoms being part of any of the groups, X being a hetero atom, Y being any atom

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Verfahren    zur Herstellung eines neuen Zwischenproduktes.    Es wurde gefunden, dass man ein neues  Zwischenprodukt für die     Farbstoffindustrie     erhält, wenn man die 1 .     3-Diamino-8-oxy-          naphthalin-6-sulfonsäure    mit soviel     Essig-.          säureanhydrid    behandelt, dass die beiden       Aminogruppen        acetyliert    werden. Das neue  Produkt bildet ein helles Pulver, das in       )Vasser    sehr leicht löslich ist.

   Mit     Diazover-          bindungen    reagiert es unter Bildung von       Azofarbstoffen.     



  <I>Beispiel:</I>  66 Teile     1.3-Diamino-8-oxynaphthalin-          6-sulfonsäure    werden in Wasser aufge  schwemmt und mit Natriumkarbonat vor  sichtig neutralisiert. Hierauf lässt man vor  sichtig 35 Teile     Essigsäurea_nhydrid        zutrop-          fen,    indem man gleichzeitig soviel Natrium-         hydroxydlösung    zufliessen     lässt,    dass die Lö  sung immer möglichst neutral reagiert. Hier  auf wird durch Eindampfen und     Aussalzen          bezw.        Kristallisierenlassen    das Produkt ge  wonnen.



      Process for the production of a new intermediate product. It has been found that a new intermediate product for the dye industry is obtained if you go to 1st 3-diamino-8-oxynaphthalene-6-sulfonic acid with so much vinegar. treated acid anhydride that the two amino groups are acetylated. The new product forms a light-colored powder that is very easily soluble in water.

   It reacts with diazo compounds to form azo dyes.



  <I> Example: </I> 66 parts of 1,3-diamino-8-oxynaphthalene-6-sulfonic acid are suspended in water and carefully neutralized with sodium carbonate. 35 parts of acetic anhydride are then carefully added dropwise by allowing enough sodium hydroxide solution to flow in at the same time that the solution always reacts as neutrally as possible. Here is BEZW by evaporation and salting out. Allow the product to crystallize.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Zwischenproduktes, dadurch gekennzeichnet, dass. man die 1 . 3-Diamino-8-oxynaphthalixi- 6-sulfonsäure mit soviel Essigsäureanhydrid behandelt, dass die beiden Aminogruppen acetyliert werden. Das neue Produkt bildet ein helles Pulver, das in Wasser sehr leicht löslich ist. Mit Diazoverbindungen reagiert es unter Bildung von Azofarbstoffen. PATENT CLAIM: Process for the production of a new intermediate product, characterized in that the 1. Treated 3-diamino-8-oxynaphthalixi- 6-sulfonic acid with enough acetic anhydride that the two amino groups are acetylated. The new product forms a light-colored powder that is very easily soluble in water. It reacts with diazo compounds to form azo dyes.
CH181528D 1934-09-29 1934-09-29 Process for the production of a new intermediate product. CH181528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH181528T 1934-09-29

Publications (1)

Publication Number Publication Date
CH181528A true CH181528A (en) 1935-12-31

Family

ID=4430871

Family Applications (1)

Application Number Title Priority Date Filing Date
CH181528D CH181528A (en) 1934-09-29 1934-09-29 Process for the production of a new intermediate product.

Country Status (1)

Country Link
CH (1) CH181528A (en)

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