GB370724A - Improved process for preparing beta-amino-anthraquinone - Google Patents

Improved process for preparing beta-amino-anthraquinone

Info

Publication number
GB370724A
GB370724A GB15970/31A GB1597031A GB370724A GB 370724 A GB370724 A GB 370724A GB 15970/31 A GB15970/31 A GB 15970/31A GB 1597031 A GB1597031 A GB 1597031A GB 370724 A GB370724 A GB 370724A
Authority
GB
United Kingdom
Prior art keywords
anthraquinone
oxidizing agent
aqueous ammonia
aminoanthraquinone
reaction mixture
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
GB15970/31A
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.)
Newport Chemical Corp
Original Assignee
Newport Chemical Corp
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 Newport Chemical Corp filed Critical Newport Chemical Corp
Publication of GB370724A publication Critical patent/GB370724A/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
    • C09B1/22—Dyes with unsubstituted amino groups

Landscapes

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

Abstract

b -Aminoanthraquinone is made by heating b -anthraquinone sulphonic acid or a salt thereof with aqueous ammonia to the required reaction temperature under pressure and then treating with an oxidizing agent under such conditions so as to avoid the presence of any substantial excess of oxidizing agent at any given instant. The oxidizing agent is preferably added slowly to the reaction mixture and at a rate commensurate with the rate of formation of sulphurous acid in the mixture. The reaction mixture should contain at any stage some leuco derivative but no reduction product lower than leuco. In an example, the sodium salt of anthraquinone-b -sulphonic acid and aqueous ammonia are heated in an autoclave to 175 DEG C. and a solution of sodium chlorate in aqueous ammonia slowly added during 15-18 hours; after dilution and addition of caustic soda the b -aminoanthraquinone is filtered off.
GB15970/31A 1930-06-13 1931-06-01 Improved process for preparing beta-amino-anthraquinone Expired GB370724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US370724XA 1930-06-13 1930-06-13

Publications (1)

Publication Number Publication Date
GB370724A true GB370724A (en) 1932-04-14

Family

ID=21892283

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15970/31A Expired GB370724A (en) 1930-06-13 1931-06-01 Improved process for preparing beta-amino-anthraquinone

Country Status (1)

Country Link
GB (1) GB370724A (en)

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