GB252745A - Improvements in methods of manufacturing dyes - Google Patents

Improvements in methods of manufacturing dyes

Info

Publication number
GB252745A
GB252745A GB13782/26A GB1378226A GB252745A GB 252745 A GB252745 A GB 252745A GB 13782/26 A GB13782/26 A GB 13782/26A GB 1378226 A GB1378226 A GB 1378226A GB 252745 A GB252745 A GB 252745A
Authority
GB
United Kingdom
Prior art keywords
molecular
proportion
nitrobenzene
proportions
molecular proportion
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
GB13782/26A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB252745A publication Critical patent/GB252745A/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
    • C09B17/00—Azine dyes

Landscapes

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

Abstract

252,745. Bucherer, H. T. May 29; 1925, [Convention date]. Azine dyes are produced by heating with concentrated sulphuric acid an aromatic compound or a mixture of aromatic compounds containing nitro and primary amino groups in approximately a proportion of one to two. The nitro and amino compounds may be derivatives of anthraquinone. According to the examples, (1) one molecular proportion of nitrobenzene is mixed with two molecular proportions of aniline and concentrated sulphuric acid slowly added while the mixture is cautiously heated; the cooled product is poured into water and the black dye which separates out is purified with caustic soda; (2) similar dyes are obtained by the treatment of two molecular proportions of a- or #-aminoanthraquinone with one molecular proportion of nitrobenzene, one molecular proportion of 1 : 5- or 2 : 6-diaminoanthraquinone with one molecular proportion of nitrobenzene, and one molecular proportion of dinitroanthraquinone with either two molecular proportions of diaminoanthraquinone or four molecular proportions of aniline or a. or #-aminoanthraquinone.
GB13782/26A 1925-05-29 1926-05-31 Improvements in methods of manufacturing dyes Expired GB252745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE252745X 1925-05-29

Publications (1)

Publication Number Publication Date
GB252745A true GB252745A (en) 1927-08-31

Family

ID=5949505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13782/26A Expired GB252745A (en) 1925-05-29 1926-05-31 Improvements in methods of manufacturing dyes

Country Status (1)

Country Link
GB (1) GB252745A (en)

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