GB190012804A - Manufacture of Black Azodyestuffs for Cotton. - Google Patents

Manufacture of Black Azodyestuffs for Cotton.

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Publication number
GB190012804A
GB190012804A GB190012804DA GB190012804A GB 190012804 A GB190012804 A GB 190012804A GB 190012804D A GB190012804D A GB 190012804DA GB 190012804 A GB190012804 A GB 190012804A
Authority
GB
United Kingdom
Prior art keywords
molecular proportion
dyes
diazotized
combining
sulphonic acid
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
Inventor
Oliver Imray
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB190012804A publication Critical patent/GB190012804A/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Abstract

12,804. Imray, O., [Farbwerke vorm. Meister Lucius, & Br³ning]. July 16. Dyes, artificial.-Black azo dye-stuffs for cotton are produced by first diazotizing a p -amido - benzene - azo - alpha - naphthylamine sulphonic acid, obtained from diazotized p-nitraniline or diazotized p-amido-acetanilide on the one hand, and an alpha-naphthylamine sulphonic acid capable of combining in the 4th position on the other hand, and subsequent reduction or hydrolysis, with one molecular proportion of nitrous acid, and then combining the amido-diazoazo product, which is diazotized in the benzene nucleus only, with one molecular proportion of amidonaphthol sulphonic acid-G in alkaline solution. Suitable alpha-naphthylamine sulphonic acids for use in the process are the 1 : 6- and 1 : 7 acids, or the technical mixture of them, and the 1 : 2- and 1 : 8- acids. Deep-black trisazo dye-stuffs are obtained by acting upon the foregoing disazo dyes with one molecular proportion of nitrous acid, and combining the diazo product with one molecular proportion of a metadiamine, such as m-phenylenediamine, m-toluylenediamine, or m-xylylenediamine. The same trisazo dyes are produced by first diazotizing a p-amidobenzene-azo-alpha-naphthylamine sulphonic acid with one molecular proportion of nitrous acid and then combining the amidodiazo product in alkaline solution with one molecular proportion of a chrysoidine obtained from one molecular proportion of diazotized amidonaphthol sulphonic acid-G and one molecular proportion of a metadiamine. The disazo dyes above described are converted into insoluble and faster deep-black dyes by diazotizing them upon the fibre and coupling them with dye-stuff components.
GB190012804D 1900-07-16 1900-07-16 Manufacture of Black Azodyestuffs for Cotton. Expired GB190012804A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190012804T 1900-07-16

Publications (1)

Publication Number Publication Date
GB190012804A true GB190012804A (en) 1901-06-08

Family

ID=32539038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190012804D Expired GB190012804A (en) 1900-07-16 1900-07-16 Manufacture of Black Azodyestuffs for Cotton.

Country Status (1)

Country Link
GB (1) GB190012804A (en)

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