DE912131C - Process for the preparation of a monoazo dye - Google Patents

Process for the preparation of a monoazo dye

Info

Publication number
DE912131C
DE912131C DEG11769D DEG0011769D DE912131C DE 912131 C DE912131 C DE 912131C DE G11769 D DEG11769 D DE G11769D DE G0011769 D DEG0011769 D DE G0011769D DE 912131 C DE912131 C DE 912131C
Authority
DE
Germany
Prior art keywords
preparation
monoazo dye
sulphonic acid
oxynaphthalene
diazotized
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DEG11769D
Other languages
German (de)
Inventor
Dr Werner Bossard
Dr Adolf Krebser
Dr Werner Kuster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
JR Geigy 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 JR Geigy AG filed Critical JR Geigy AG
Application granted granted Critical
Publication of DE912131C publication Critical patent/DE912131C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

Verfahren zur Darstellung eines Monoazofarbstoffes Es wurde gefunden, daB man einen wertvollen Monoazofarbstoff erhält, wenn man diazotierte 2-Aminodiphenylsulfon-3'-sulfonsäure mit 2-Amino-8-oxynaphthalin-6-sulfonsäure in saurem Medium kuppelt. Beispiel 31,3 Teile 2-Aminodiphenylsulfon-3'-sulfonsäure werden, wie bekannt, indirekt diazotiert, und die Diazoniumverbindung wird mit einer sauren Suspension von 24 Teilen 2-Amino-8-oxynaphthalin-6-sulfonsäure vereinigt. Die Kupplung ist rasch beendet, wenn man die überschüssige Mineralsäure in üblicher Weise abstumpft. Dann salzt man aus, filtriert und trocknet. Der erhaltene Farbstoff, ein leuchtend rotes Pulver, färbt Wolle aus saurem Bad in reinen, bläulichroten Tönen von hervorragender Lichtechtheit.Process for preparing a monoazo dye It has been found that a valuable monoazo dye is obtained when diazotized 2-aminodiphenylsulfone-3'-sulfonic acid is coupled with 2-amino-8-oxynaphthalene-6-sulfonic acid in an acidic medium. Example 31.3 parts of 2-aminodiphenylsulfone-3'-sulfonic acid are diazotized indirectly, as is known, and the diazonium compound is combined with an acidic suspension of 24 parts of 2-amino-8-oxynaphthalene-6-sulfonic acid. The coupling is ended quickly if the excess mineral acid is blunted in the usual way. Then it is salted out, filtered and dried. The dye obtained, a bright red powder, dyes wool from an acid bath in pure, bluish-red shades of excellent lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Monoazofarbstoffes, dadurch gekennzeichnet, daB man diazotierte 2-Aminodiphenylsulfon-3'-sulfonsäure mit 2-Amino-8-oxynaphthalin-6-sulfonsäure in saurem Medium kuppelt. Angezogene Druckschriften Deutsche Patentschriften Nr. 517 437, 61o o67, 652 868; französische Patentschrift Nr. 839 6o2.Claim: Process for the preparation of a monoazo dye, characterized in that diazotized 2-aminodiphenylsulphone-3'-sulphonic acid is coupled with 2-amino-8-oxynaphthalene-6-sulphonic acid in an acidic medium. Attached publications German Patent Nos. 517 437, 61o o67, 652 868; French patent specification No. 839 6o2.
DEG11769D 1940-04-26 1940-06-11 Process for the preparation of a monoazo dye Expired DE912131C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH912131X 1940-04-26

Publications (1)

Publication Number Publication Date
DE912131C true DE912131C (en) 1954-05-24

Family

ID=4547458

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG11769D Expired DE912131C (en) 1940-04-26 1940-06-11 Process for the preparation of a monoazo dye

Country Status (1)

Country Link
DE (1) DE912131C (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE517437C (en) * 1928-03-31 1931-02-05 I G Farbenindustrie Akt Ges Process for the preparation of monoazo dyes
DE610067C (en) * 1932-05-03 1935-03-04 I G Farbenindustrie Akt Ges Process for the preparation of a monoazo dye
DE652868C (en) * 1934-08-11 1937-11-11 I G Farbenindustrie Akt Ges Process for the production of azo dyes
FR839602A (en) * 1937-06-22 1939-04-07 Ig Farbenindustrie Ag Water-soluble azo dyes and method of preparing these dyes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE517437C (en) * 1928-03-31 1931-02-05 I G Farbenindustrie Akt Ges Process for the preparation of monoazo dyes
DE610067C (en) * 1932-05-03 1935-03-04 I G Farbenindustrie Akt Ges Process for the preparation of a monoazo dye
DE652868C (en) * 1934-08-11 1937-11-11 I G Farbenindustrie Akt Ges Process for the production of azo dyes
FR839602A (en) * 1937-06-22 1939-04-07 Ig Farbenindustrie Ag Water-soluble azo dyes and method of preparing these dyes

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