GB484679A - Dyestuff intermediates of the anthraquinone series and their manufacture - Google Patents

Dyestuff intermediates of the anthraquinone series and their manufacture

Info

Publication number
GB484679A
GB484679A GB3034736A GB3034736A GB484679A GB 484679 A GB484679 A GB 484679A GB 3034736 A GB3034736 A GB 3034736A GB 3034736 A GB3034736 A GB 3034736A GB 484679 A GB484679 A GB 484679A
Authority
GB
United Kingdom
Prior art keywords
manufacture
anthraquinone series
dihalogen
aminoanthraquinone
oleum
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
GB3034736A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to GB3034736A priority Critical patent/GB484679A/en
Publication of GB484679A publication Critical patent/GB484679A/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
    • C09B1/00—Dyes with anthracene nucleus not condensed with any other ring
    • C09B1/16—Amino-anthraquinones
    • C09B1/20—Preparation from starting materials already containing the anthracene nucleus
    • C09B1/26—Dyes with amino groups substituted by hydrocarbon radicals
    • C09B1/28—Dyes with amino groups substituted by hydrocarbon radicals substituted by alkyl, aralkyl or cyclo alkyl groups

Landscapes

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

Abstract

1 : 3 - Dihalogen - 2 - methylaminoanthraquinones are manufactured by reacting a 1 : 3 - dihalogen - 2 - aminoanthraquinone with formaldehyde in concentrated sulphuric sulphuric acid of not less than 90 per cent strength, preferably about 97-98 per cent. The reaction may be carried out by using aqueous formaldehyde and sufficient oleum to give the required sulphuric acid concentration. The products are intermediates for the production of indanthrone dyestuffs. In examples, 1 : 3-dibromo-, 1-bromo-3-chloro- and 1-3-di-chloro - 2 - aminoanthraquinone are treated with aqueous formaldehyde and oleum. Specification 22128/01, [Class 2], is referred to.
GB3034736A 1936-11-06 1936-11-06 Dyestuff intermediates of the anthraquinone series and their manufacture Expired GB484679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3034736A GB484679A (en) 1936-11-06 1936-11-06 Dyestuff intermediates of the anthraquinone series and their manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3034736A GB484679A (en) 1936-11-06 1936-11-06 Dyestuff intermediates of the anthraquinone series and their manufacture

Publications (1)

Publication Number Publication Date
GB484679A true GB484679A (en) 1938-05-06

Family

ID=10306202

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3034736A Expired GB484679A (en) 1936-11-06 1936-11-06 Dyestuff intermediates of the anthraquinone series and their manufacture

Country Status (1)

Country Link
GB (1) GB484679A (en)

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