GB190626416A - Manufacture of New Ortho-oxy-monoazo-colouring Matters. - Google Patents

Manufacture of New Ortho-oxy-monoazo-colouring Matters.

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Publication number
GB190626416A
GB190626416A GB190626416DA GB190626416A GB 190626416 A GB190626416 A GB 190626416A GB 190626416D A GB190626416D A GB 190626416DA GB 190626416 A GB190626416 A GB 190626416A
Authority
GB
United Kingdom
Prior art keywords
acid
sulphonic acid
sulphonic
aminonaphthol
reduction
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
Arthur George Bloxam
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.)
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 GB190626416A publication Critical patent/GB190626416A/en
Expired legal-status Critical Current

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Abstract

26,416. Bloxam, A. G., [Akt.-Ges. f³r Anilin-Fabrikation]. Nov. 21. Dyes, artificial.-Azo dyes are obtained by reduction of azo dyes of the type i.e. a dye obtained by coupling diazotized picramic acid with an acid R, where R = a naphthol sulphomc, aminonaphthol sulphonic, naphthylamine sulphonic, or dioxynaphthalene sulphonic acid. The reduction is effected by means of a hydrogen sulphide of an alkaline-earth metal, or by means of a mixture of sodium sulphide with a suitable salt of an alkaline-earth metal ; or according to the Provisional Specification, by means of a sulphide of an alkaline-earth metal. The preparation of the dye-stuff from picramic acid and 2 : 6-naphthol sulphonic acid, and the reduction thereof to the nitroamino dye-stuff, are described in an example, and a table is given of the properties of the dyes obtained by reduction of the dyes from picramic acid and 1 4-naphthol sulphonic acid, 1 :5-naphthol sulphonic acid, 1 : 8-aminonaphthol-4-sulphonic acid, 2 5-aminonaphthol-7-sulphonic acid, 2 : 8 aminonaphthol-6-sulphonic acid, 1:4-naphthylamine sulphonic acid, 2 : 6-naphthylamine sulphonic acid, and 1: 8-dioxynaphthalene-3 : 6-disulphonic acid.
GB190626416D 1906-11-21 1906-11-21 Manufacture of New Ortho-oxy-monoazo-colouring Matters. Expired GB190626416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190626416T 1906-11-21

Publications (1)

Publication Number Publication Date
GB190626416A true GB190626416A (en) 1907-11-07

Family

ID=32257350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190626416D Expired GB190626416A (en) 1906-11-21 1906-11-21 Manufacture of New Ortho-oxy-monoazo-colouring Matters.

Country Status (1)

Country Link
GB (1) GB190626416A (en)

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