GB275927A - Improvements in the manufacture and production of benzanthrone derivatives - Google Patents

Improvements in the manufacture and production of benzanthrone derivatives

Info

Publication number
GB275927A
GB275927A GB6308/27A GB630827A GB275927A GB 275927 A GB275927 A GB 275927A GB 6308/27 A GB6308/27 A GB 6308/27A GB 630827 A GB630827 A GB 630827A GB 275927 A GB275927 A GB 275927A
Authority
GB
United Kingdom
Prior art keywords
per cent
sulphuric acid
benzanthrone
derivatives
cent strength
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
GB6308/27A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB275927A publication Critical patent/GB275927A/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
    • C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/02—Benzathrones
    • C09B3/06—Preparation from starting materials already containing the benzanthrone nucleus

Landscapes

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

Abstract

275,927. I. G. Farbenindustrie Akt.- Ges. Aug. 10, 1926, [Convention date]. Benzanthrene derivatives.-Benzanthrone or its derivatives are. treated with manganese dioxide in presence of sulphuric acid of 65 to 85 per cent strength; the products are not Bz1 : Bz1<1>-dibenzanthronyls, but are soluble in alkali and bisulphite solutions and yield anthraquinone-1-carboxylic acids by action of alkaline oxidizing agents. When 2-substituted benzanthrones are employed, other acid oxidizing agents can be used. Examples are given of the oxidation of benzanthrone and 2- chlorbenzanthrone with manganese dioxide and sulphuric acid of 66 or 77 per cent strength, and of the oxidation of 2- methylbenzanthrone with manganese, dioxide and sulphuric acid of 96 per cent strength; for the latter reaction chromic anhydride or a chromate is also specified as a suitable oxidizing agent. Specifications 251,313 and 278,496 are referred to.
GB6308/27A 1926-08-10 1927-03-07 Improvements in the manufacture and production of benzanthrone derivatives Expired GB275927A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE275927X 1926-08-10

Publications (1)

Publication Number Publication Date
GB275927A true GB275927A (en) 1928-06-07

Family

ID=6027946

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6308/27A Expired GB275927A (en) 1926-08-10 1927-03-07 Improvements in the manufacture and production of benzanthrone derivatives

Country Status (1)

Country Link
GB (1) GB275927A (en)

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