GB445355A - Improvements in the manufacture and production of vat dyestuffs - Google Patents

Improvements in the manufacture and production of vat dyestuffs

Info

Publication number
GB445355A
GB445355A GB2875534A GB2875534A GB445355A GB 445355 A GB445355 A GB 445355A GB 2875534 A GB2875534 A GB 2875534A GB 2875534 A GB2875534 A GB 2875534A GB 445355 A GB445355 A GB 445355A
Authority
GB
United Kingdom
Prior art keywords
sulphur
halogen
sulphuric acid
acid
dibenzanthrone
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
GB2875534A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB2875534A priority Critical patent/GB445355A/en
Publication of GB445355A publication Critical patent/GB445355A/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
    • C09B3/22—Dibenzanthrones; Isodibenzanthrones
    • C09B3/30—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus
    • C09B3/32—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus by halogenation

Abstract

Vat dyestuffs are prepared by halogenating dibenzanthrone, isodibenzanthrone or their halogen substitution products in presence of mixtures of halogen sulphonic acids with sulphuric acid monohydrate or fuming sulphuric acid and sulphur, the amount of sulphur being at least 2 per cent of the reaction mixture. Agents supplying halogen, and agents supplying sulphur, such as sulphur monochloride, may be used instead of halogen and sulphur. Acid mixtures containing up to 1 part of sulphuric acid to every part of halogen sulphonic acid are most suitable. The halogen content of the dyestuffs produced rises or falls with the temperature and duration of the reaction. In examples, 1-, 2-, and 3-dibenzanthrone, 4-isodibenzanthrone, and 5- monobromdibenzanthrone are heated with chlorsulphonic acid and sulphuric acid monohydrate or fuming sulphuric acid, bromine and sulphur for a few hours at about 50 DEG C. The mixture is then cooled, poured on to ice, diluted, boiled and a blue paste obtained by filtration, which, after being freed from admixed sulphur, contains 5--6 per cent of sulphur by analysis. Specification 335,948, [Class 2 (iii)], is referred to.
GB2875534A 1934-10-08 1934-10-08 Improvements in the manufacture and production of vat dyestuffs Expired GB445355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2875534A GB445355A (en) 1934-10-08 1934-10-08 Improvements in the manufacture and production of vat dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2875534A GB445355A (en) 1934-10-08 1934-10-08 Improvements in the manufacture and production of vat dyestuffs

Publications (1)

Publication Number Publication Date
GB445355A true GB445355A (en) 1936-04-08

Family

ID=10280605

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2875534A Expired GB445355A (en) 1934-10-08 1934-10-08 Improvements in the manufacture and production of vat dyestuffs

Country Status (1)

Country Link
GB (1) GB445355A (en)

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