DE561553C - Process for the preparation of a monoazo dye - Google Patents

Process for the preparation of a monoazo dye

Info

Publication number
DE561553C
DE561553C DE1930561553D DE561553DD DE561553C DE 561553 C DE561553 C DE 561553C DE 1930561553 D DE1930561553 D DE 1930561553D DE 561553D D DE561553D D DE 561553DD DE 561553 C DE561553 C DE 561553C
Authority
DE
Germany
Prior art keywords
preparation
monoazo dye
dye
monoazo
naphthol
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
DE1930561553D
Other languages
German (de)
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.)
IG Farbenindustrie AG
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
Application granted granted Critical
Publication of DE561553C publication Critical patent/DE561553C/en
Expired legal-status Critical Current

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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
    • C09B29/10—Monoazo dyes prepared by diazotising and coupling from coupling components containing hydroxy as the only directing group

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

Description

Verfahren zur Darstellung eines Monoazofarbstoffes Es wurde gefunden, daB man durch Kuppeln der 2-Diazo-q.-sulfo-i-benzoesäure mit ß-Naphthol einen leicht zugänglichen Monoazofarbstoff erhält, der sich durch technisch wertvolle Eigenschaften auszeichnet. Dies Ergebnis muB als überraschend angesehen werden,. da die ähnlich könstituierten, aus den isomeren Diazosulfobenzoesäuren oder aus gewissen Substitutionsprodukten der 2-Diazoq.-sulfo-i-benzoesäure und ß-Naphthol erhältlichen Monoazofarbstoffe keine Eigenschaften besitzen, die ihre Einführung in die Technik gestattet hätten.Process for the preparation of a monoazo dye It was found that by coupling the 2-diazo-q.-sulfo-i-benzoic acid with ß-naphthol one easily accessible monoazo dye, which is technically valuable properties excels. This result must be regarded as surprising. because they are similar substituted, from the isomeric diazosulfobenzoic acids or from certain substitution products of the 2-diazoq-sulfo-i-benzoic acid and ß-naphthol available monoazo dyes have no properties that would have permitted their introduction into technology.

Beispiel 21,7 Gewichtsteile 2-Amino-q.-sulfo-i-benzoesäure werden in üblicher Weise dianotiert und in neutraler oder schwach alkalischer Lösung mit 14,5 Gewichtsteilen ß-Naphthol gekuppelt. Nach beendeter Kupplung wird die Farbstofflösung filtriert und mit Kochsalz ausgesalzen.' Es fällt in fast quantitativer Ausbeute das Dinatriumsalz des Farbstoffes aus, ein in getrocknetem Zustande gelbrotes, in Wasser mit oranger Farbe lösliches Pulver. Der Farbstoff färbt Wolle in klarem, orangerotem Farbton, der durch Nachchromieren in ein Bordo übergeht.Example 21.7 parts by weight of 2-amino-q.-sulfo-i-benzoic acid dianotized in the usual way and in a neutral or weakly alkaline solution with 14.5 parts by weight of ß-naphthol coupled. When the coupling is complete, the dye solution is filtered and salted out with table salt. ' It falls in almost quantitative yield the disodium salt of the dye, a yellow-red when dried, in Powder soluble in water with orange color. The dye dyes wool in a clear, orange-red hue that turns into a bordo after chrome plating.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Monoazofarbstoffes, dadurch gekennzeichnet, daB die a-Diazo-q.-sulfa-i-benzoesäure mit ß-Naphthol gekuppelt wird.PATENT CLAIM: Process for the preparation of a monoazo dye, characterized in that the α-diazo-q.-sulfa-i-benzoic acid is coupled with β-naphthol will.
DE1930561553D 1930-09-03 1930-09-03 Process for the preparation of a monoazo dye Expired DE561553C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE561553T 1930-09-03

Publications (1)

Publication Number Publication Date
DE561553C true DE561553C (en) 1932-10-15

Family

ID=6566261

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930561553D Expired DE561553C (en) 1930-09-03 1930-09-03 Process for the preparation of a monoazo dye

Country Status (1)

Country Link
DE (1) DE561553C (en)

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