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GB278102A - The manufacture of new vat dyes and intermediates for vat dyes - Google Patents

The manufacture of new vat dyes and intermediates for vat dyes

Info

Publication number
GB278102A
GB278102A GB1702826A GB1702826A GB278102A GB 278102 A GB278102 A GB 278102A GB 1702826 A GB1702826 A GB 1702826A GB 1702826 A GB1702826 A GB 1702826A GB 278102 A GB278102 A GB 278102A
Authority
GB
United Kingdom
Prior art keywords
pyranthrone
dyes cotton
vat dyes
product dyes
shades
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
GB1702826A
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.)
Imperial Chemical Industries Ltd
Original Assignee
British Dyestuffs Corp Ltd
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 British Dyestuffs Corp Ltd filed Critical British Dyestuffs Corp Ltd
Priority to GB1702826A priority Critical patent/GB278102A/en
Publication of GB278102A publication Critical patent/GB278102A/en
Expired legal-status Critical Current

Links

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
    • C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/40—Pyranthrones
    • C09B3/44—Preparation from starting materials already containing the pyranthrone nucleus

Landscapes

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

Abstract

278,102. British Dyestuffs Corporation, Ltd., Shepherdson, A., and Hailwood, A. J. July 7, 1926. Pyranthrone derivatives. - Pyrantbrone is treated with oxidizing agents in sulphuric acid solution or suspension. The, product dyes cotton from the vat in brown shades which are not fast, becoming greener in presence of alkali and redder in presence, of acid; after alkylation, however, if desired after separation from unchanged pyranthrone or treatment with reducing agents, the product dyes cotton in fast red to brown shades. According to examples, pyranthrone is oxidized with manganese dioxide in sulphuric acid at 60‹ C. and the product boiled with sodium bisulphite and then methylated with dimethylsulphate. in nitrobenzene; the product dyes cotton in brown shades : if the reduced body is extracted with nitrobenzene to remove pyranthrone prior to methylation, the final product dyes cotton in red shades. Specification 193,431 is referred to.
GB1702826A 1926-07-07 1926-07-07 The manufacture of new vat dyes and intermediates for vat dyes Expired GB278102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1702826A GB278102A (en) 1926-07-07 1926-07-07 The manufacture of new vat dyes and intermediates for vat dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1702826A GB278102A (en) 1926-07-07 1926-07-07 The manufacture of new vat dyes and intermediates for vat dyes

Publications (1)

Publication Number Publication Date
GB278102A true GB278102A (en) 1927-10-06

Family

ID=10087908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1702826A Expired GB278102A (en) 1926-07-07 1926-07-07 The manufacture of new vat dyes and intermediates for vat dyes

Country Status (1)

Country Link
GB (1) GB278102A (en)

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