GB190804541A - Manufacture of Dyestuffs Containing Sulphur or their Leuco-compounds. - Google Patents

Manufacture of Dyestuffs Containing Sulphur or their Leuco-compounds.

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Publication number
GB190804541A
GB190804541A GB190804541DA GB190804541A GB 190804541 A GB190804541 A GB 190804541A GB 190804541D A GB190804541D A GB 190804541DA GB 190804541 A GB190804541 A GB 190804541A
Authority
GB
United Kingdom
Prior art keywords
dyes
leuco
thioacetophenones
compounds
manufacture
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
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 GB190804541A publication Critical patent/GB190804541A/en
Expired legal-status Critical Current

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Abstract

4541. Imray, O., [Farbwerke vorm, Meister, Lucius, & Br³ning]. Feb. 28. Dyes, artificial.-Thioindigo dyes are obtained by the oxidation in alkaline solution of o-thioacetophenones of the general formula or their alkyl, alkyloxy, halogen, or like derivatives. The oxidation is preferably effected by passing air into the alkaline solution, but other agents, such as potassium ferricyanide, persulphates, perborates, or percarbonates, may be used. Heating the parent materials with sulphur and sodium sulphide yields leuco derivatives of the dyes. o-Thioacetophenones.-The above parent materials are obtained from o-diazoacetophenones by the usual methods. They oxidize on exposure to air, giving dithio bodies of the general formula
GB190804541D 1908-02-28 1908-02-28 Manufacture of Dyestuffs Containing Sulphur or their Leuco-compounds. Expired GB190804541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190804541T 1908-02-28

Publications (1)

Publication Number Publication Date
GB190804541A true GB190804541A (en) 1908-10-01

Family

ID=32207820

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190804541D Expired GB190804541A (en) 1908-02-28 1908-02-28 Manufacture of Dyestuffs Containing Sulphur or their Leuco-compounds.

Country Status (1)

Country Link
GB (1) GB190804541A (en)

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