GB293328A - Improvements in and relating to dyestuffs and intermediates - Google Patents

Improvements in and relating to dyestuffs and intermediates

Info

Publication number
GB293328A
GB293328A GB3288726A GB3288726A GB293328A GB 293328 A GB293328 A GB 293328A GB 3288726 A GB3288726 A GB 3288726A GB 3288726 A GB3288726 A GB 3288726A GB 293328 A GB293328 A GB 293328A
Authority
GB
United Kingdom
Prior art keywords
alizarine
alkyl
oxidizing agent
anthraquinone
sodium
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
GB3288726A
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.)
HERBERT WILFRID HEREWARD
Scottish Dyes Ltd
Original Assignee
HERBERT WILFRID HEREWARD
Scottish Dyes 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 HERBERT WILFRID HEREWARD, Scottish Dyes Ltd filed Critical HERBERT WILFRID HEREWARD
Priority to GB3288726A priority Critical patent/GB293328A/en
Publication of GB293328A publication Critical patent/GB293328A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C46/00—Preparation of quinones

Landscapes

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

Abstract

293,328. Hereward, H. W., Thomas, J., and Scottish Dyes, Ltd. Dec. 29, 1926. Oxyanthraquinones are obtained by the action of aqueous solutions of caustic alkalies on #- alkyl- or #-carboxy-anthraquinone in the presence or absence of an oxidizing agent. The alkyl or carboxyl group is replaced by a hydroxyl group, and in the presence of an oxidizing agent an additional hyroxyl grcup may be introduced into the anthraquinone nucleus. In examples, (1) #-carboxyanthraquinone is heated in an autoclave with caustic soda solution and sodium chlorate; sodium alizarate is produced and is worked up to alizarine, in the usual way, and (2) #-methylanthraquinone is similarly treated to obtain alizarine. The process of Specification 246,529 may be used in conjunction with the process of the invention, if desired.
GB3288726A 1926-12-29 1926-12-29 Improvements in and relating to dyestuffs and intermediates Expired GB293328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3288726A GB293328A (en) 1926-12-29 1926-12-29 Improvements in and relating to dyestuffs and intermediates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3288726A GB293328A (en) 1926-12-29 1926-12-29 Improvements in and relating to dyestuffs and intermediates

Publications (1)

Publication Number Publication Date
GB293328A true GB293328A (en) 1928-06-29

Family

ID=10345513

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3288726A Expired GB293328A (en) 1926-12-29 1926-12-29 Improvements in and relating to dyestuffs and intermediates

Country Status (1)

Country Link
GB (1) GB293328A (en)

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