GB439279A - Manufacture of vat-dyestuffs - Google Patents

Manufacture of vat-dyestuffs

Info

Publication number
GB439279A
GB439279A GB1638135A GB1638135A GB439279A GB 439279 A GB439279 A GB 439279A GB 1638135 A GB1638135 A GB 1638135A GB 1638135 A GB1638135 A GB 1638135A GB 439279 A GB439279 A GB 439279A
Authority
GB
United Kingdom
Prior art keywords
benzanthronyl
aminobenzanthrone
nitrobenzene
halogenating
benzanthrone
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
GB1638135A
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.)
Novartis AG
Original Assignee
Novartis AG
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
Priority to CH439279X priority Critical
Application filed by Novartis AG filed Critical Novartis AG
Publication of GB439279A publication Critical patent/GB439279A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B3/00Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/22Dibenzanthrones; Isodibenzanthrones
    • C09B3/24Preparation by synthesis of the nucleus

Abstract

Vat dyes are obtained by treating a bz-1-benzanthronyl-5-aminobenzanthrone with hot caustic alkaline agents, and if desired, halogenating the product. According to examples, bz - 1 - benzanthronyl - 5 - amino - benzanthrone is condensed with caustic potash in ethyl alcohol, and the product is halogenated with bromine in chlor-sulphonic acid, bromine in nitrobenzene, or sulphuryl chloride in nitrobenzene; the product before halogenation is vatted by a customary method and gives on cotton a navy-blue dye; benzanthronyl-5-aminobenzanthrones specified may have alkyl substituents such as methyl. Chlorine and chlorsulphonic acid are also specified as halogenating agents, and the customary halogenating catalysts and/or solvents may be used. The products are blue dyes for cotton. The bz-1-benzanthronyl - 5 - aminobenzanthrone may be obtained by heating 5-aminobenzanthrone with bz - 1 - bromo - benzanthrone in presence of sodium and copper acetates and nitrobenzene.
GB1638135A 1934-06-05 1935-06-05 Manufacture of vat-dyestuffs Expired GB439279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH439279X 1934-06-05

Publications (1)

Publication Number Publication Date
GB439279A true GB439279A (en) 1935-12-03

Family

ID=4515145

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1638135A Expired GB439279A (en) 1934-06-05 1935-06-05 Manufacture of vat-dyestuffs

Country Status (1)

Country Link
GB (1) GB439279A (en)

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