GB280652A - Improvements in the manufacture of black and grey vat dyes - Google Patents

Improvements in the manufacture of black and grey vat dyes

Info

Publication number
GB280652A
GB280652A GB2085726A GB2085726A GB280652A GB 280652 A GB280652 A GB 280652A GB 2085726 A GB2085726 A GB 2085726A GB 2085726 A GB2085726 A GB 2085726A GB 280652 A GB280652 A GB 280652A
Authority
GB
United Kingdom
Prior art keywords
hydroxylamine
benzanthrone
sulphonation
hydrochloride
ferrous sulphate
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
GB2085726A
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 GB2085726A priority Critical patent/GB280652A/en
Publication of GB280652A publication Critical patent/GB280652A/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
    • C09B3/02—Benzathrones
    • C09B3/06—Preparation from starting materials already containing the benzanthrone nucleus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

280,652. British Dyestuffs Corporation, Ltd., Shepherds on, A., and Thornley, S. Aug. 24, 1926. Dibenzanthrone dyes. - Bluish-grey to black vat-dyestuffs are produced by treating with hydroxylamine and then subjecting to alkali fusion the sulphonic acids of benzanthrone or substituted benzanthrones. such as methyl- or chlor-benzanthrone, whether obtained by synthesis from anthraquinone sulphonic acids or by direct sulphonation as described in Specification 276,766. The sulphonation and treatment with hydroxylamine may be effected in the same sulphuric acid. According to examples, (1) benzanthrone sulphonic acid prepared according to example 1 of Specification 276,766 is treated in sulphuric acid solution at 150‹ C. with hydroxylamine hydrochloride and ferrous sulphate: the product is poured into water, salted out, and subjected to caustic potash fusion; (2) benzanthrone is sulphonated with weak oleum, and the reaction mixture diluted slightly and treated directly with hydroxylamine by hydrochloride and ferrous sulphate as in example 1. As parent materials are also specified methylbenzanthrone (M.Pt. 197- 199‹ C.) from 2.methylanthraquinone, and Bz1- chlorbenzanthrone. The hydroxylamine may be in the form of the solution obtained by electrolytic reduction of nitric acid. Specification 276,767 also is referred to.
GB2085726A 1926-08-24 1926-08-24 Improvements in the manufacture of black and grey vat dyes Expired GB280652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2085726A GB280652A (en) 1926-08-24 1926-08-24 Improvements in the manufacture of black and grey vat dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2085726A GB280652A (en) 1926-08-24 1926-08-24 Improvements in the manufacture of black and grey vat dyes

Publications (1)

Publication Number Publication Date
GB280652A true GB280652A (en) 1927-11-24

Family

ID=10152910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2085726A Expired GB280652A (en) 1926-08-24 1926-08-24 Improvements in the manufacture of black and grey vat dyes

Country Status (1)

Country Link
GB (1) GB280652A (en)

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