GB385620A - Process for the manufacture of azo-dyestuffs and intermediate products therefor - Google Patents

Process for the manufacture of azo-dyestuffs and intermediate products therefor

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Publication number
GB385620A
GB385620A GB3367732A GB3367732A GB385620A GB 385620 A GB385620 A GB 385620A GB 3367732 A GB3367732 A GB 3367732A GB 3367732 A GB3367732 A GB 3367732A GB 385620 A GB385620 A GB 385620A
Authority
GB
United Kingdom
Prior art keywords
hydroxy
naphthindole
chloraniline
diazotized
methyl
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
GB3367732A
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
Priority to GB3367732A priority Critical patent/GB385620A/en
Publication of GB385620A publication Critical patent/GB385620A/en
Expired legal-status Critical Current

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Abstract

Azo dyes are made in substance or on the fibre by coupling the diazo compounds of aromatic or heterocyclic amines containing no group inducing solubility in water with hydroxyindoles or hydroxynaphthindoles. In examples, (1) cotton impregnated with 8-hydroxy-2-phenyl-a -naphthindole is developed with diazotized 2 : 5-dichloraniline, 2-chloroaniline, 2 - methyl - 4 - chloraniline, or 4-chloro-2-nitraniline, (2) cotton impregnated with 8-hydroxy - 2 : 3 - dimethyl - a - naphthindole is developed with diazotized 2-nitro-4-chloraniline, 2-methyl - 4 - nitraniline or 2-methyl-4-chloraniline; 8-hydroxy-2 : 3-methylethyl or 2 : 3-diphenyl-a -naphthindoles may also be used, (3) cotton is impregnated with 7-hydroxy-2 : 3-dimethyl-a -naphthindole and developed with diazotized 2 : 5-dichloraniline or with 7 - hydroxy - 2 - phenyl - a - naphthindole and developed with diazotized 2-chloraniline, 4-chloro-2-nitraniline, or 2-methyl-5-chloroaniline. Hydroxy-indoles and naphthindoles are made by subjecting to alkali fusion the sulphonic acids of Specification 385,605, but which are free from nitro or amino groups. In an example, 2-phenyl-a -naphthindole - 8 - sulphonic acid is fused with caustic potash.
GB3367732A 1931-06-11 1931-06-11 Process for the manufacture of azo-dyestuffs and intermediate products therefor Expired GB385620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3367732A GB385620A (en) 1931-06-11 1931-06-11 Process for the manufacture of azo-dyestuffs and intermediate products therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3367732A GB385620A (en) 1931-06-11 1931-06-11 Process for the manufacture of azo-dyestuffs and intermediate products therefor

Publications (1)

Publication Number Publication Date
GB385620A true GB385620A (en) 1932-12-12

Family

ID=10356012

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3367732A Expired GB385620A (en) 1931-06-11 1931-06-11 Process for the manufacture of azo-dyestuffs and intermediate products therefor

Country Status (1)

Country Link
GB (1) GB385620A (en)

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