GB189834A - Improvements in and relating to the manufacture of dyestuffs of the anthraquinone series - Google Patents

Improvements in and relating to the manufacture of dyestuffs of the anthraquinone series

Info

Publication number
GB189834A
GB189834A GB2068221A GB2068221A GB189834A GB 189834 A GB189834 A GB 189834A GB 2068221 A GB2068221 A GB 2068221A GB 2068221 A GB2068221 A GB 2068221A GB 189834 A GB189834 A GB 189834A
Authority
GB
United Kingdom
Prior art keywords
anthraquinone
temperature
dyestuffs
relating
manufacture
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
GB2068221A
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.)
ARTHUR GILBERT DANDRIDGE
Scottish Dyes Ltd
Original Assignee
ARTHUR GILBERT DANDRIDGE
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 ARTHUR GILBERT DANDRIDGE, Scottish Dyes Ltd filed Critical ARTHUR GILBERT DANDRIDGE
Priority to GB2068221A priority Critical patent/GB189834A/en
Publication of GB189834A publication Critical patent/GB189834A/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

N-dihydro-1.2.21.11-anthraquinone-azine or its derivatives is produced by fusing 2-amino-anthraquinone or its derivatives with caustic potash or other alkali at a temperature of about 200-240 DEG C. in the presence of an inorganic salt or salts capable of acting as a reducing agent, whereby improved yields are obtained. The inorganic salts specified are cyanides, sulphides and ferrocyanides of the alkali metals. In an example caustic potash is melted, potassium sulphide is stirred in and the temperature raised to 200 DEG C. The 2-amino-anthraquinone is then added and the temperature finally raised to 220-240 DEG C. The mixture is poured into water and boiled. Alternatively the sulphide and potash may be first mixed and then melted.
GB2068221A 1921-08-03 1921-08-03 Improvements in and relating to the manufacture of dyestuffs of the anthraquinone series Expired GB189834A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2068221A GB189834A (en) 1921-08-03 1921-08-03 Improvements in and relating to the manufacture of dyestuffs of the anthraquinone series

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2068221A GB189834A (en) 1921-08-03 1921-08-03 Improvements in and relating to the manufacture of dyestuffs of the anthraquinone series

Publications (1)

Publication Number Publication Date
GB189834A true GB189834A (en) 1922-12-04

Family

ID=10149916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2068221A Expired GB189834A (en) 1921-08-03 1921-08-03 Improvements in and relating to the manufacture of dyestuffs of the anthraquinone series

Country Status (1)

Country Link
GB (1) GB189834A (en)

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