GB369765A - The manufacture of new vat dyestuffs - Google Patents

The manufacture of new vat dyestuffs

Info

Publication number
GB369765A
GB369765A GB1085531A GB1085531A GB369765A GB 369765 A GB369765 A GB 369765A GB 1085531 A GB1085531 A GB 1085531A GB 1085531 A GB1085531 A GB 1085531A GB 369765 A GB369765 A GB 369765A
Authority
GB
United Kingdom
Prior art keywords
glyoxal
chloride
heated
manganese dioxide
sodium
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
GB1085531A
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
Priority to GB1085531A priority Critical patent/GB369765A/en
Publication of GB369765A publication Critical patent/GB369765A/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

Landscapes

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

Abstract

Brown vat dyestuffs are obtained by treating with an acid condensing agent, such as aluminium chloride or concentrated sulphuric acid, the vat-dyes obtained according to Specification 299,972, [Class 2 (iii), Dyes &c.], by treating with an alkaline condensing agent a glyoxal-dianthraquinone compound of the general formula:-- <PICT:0369765/IV/1> The same products may also be obtained by treating the above glyoxal-dianthraquinones, without a preliminary alkali-condensation, with an acid condensing agent such as aluminium chloride. The reaction may advantageously be carried out in the presence of an indifferent diluent and of a suitable oxidizing agent, such as manganese dioxide, ferric chloride, halogen or the like; halogen atoms may thus be introduced into the molecule. In examples, (1) the condensation product of glyoxal and anthrone (of example 1 of Specification 299,972) with aluminium-sodium chloride and manganese dioxide, are heated together for a period depending upon the temperature attained; ferric chloride may also be added; (2) the condensation product from 2-chloranthrone and glyoxal is heated with sodium-aluminiumchloride and manganese dioxide; or instead of adding manganese dioxide, chlorine or air may be led through the reaction mass; the condensation products from 2-methyl- or -2-phenylanthrone and glyoxal may also be converted by such treatment; (3) the condensation product from 2 : 6-dichloranthrone and glyoxal is heated together with sodium-aluminium-chloride and manganese dioxide; (4) the condensation product from anthrone and glyoxal is subjected to alcoholic potash fusion and the product heated with sodium-aluminium chloride; the condensed product from 2-chloranthrone and glyoxal first alkali-fused may similarly be treated, or better heated in concentrated sulphuric acid; (5) the condensation product from glyoxal and anthrone is alkali-fused and then heated in concentrated sulphuric acid; the product is more or less sulphonated, such sulphonation being decreased by the presence of sodium sulphate; zinc chloride may be used instead of sulphuric acid as condensing agent.
GB1085531A 1931-04-13 1931-04-13 The manufacture of new vat dyestuffs Expired GB369765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1085531A GB369765A (en) 1931-04-13 1931-04-13 The manufacture of new vat dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1085531A GB369765A (en) 1931-04-13 1931-04-13 The manufacture of new vat dyestuffs

Publications (1)

Publication Number Publication Date
GB369765A true GB369765A (en) 1932-03-31

Family

ID=9975556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1085531A Expired GB369765A (en) 1931-04-13 1931-04-13 The manufacture of new vat dyestuffs

Country Status (1)

Country Link
GB (1) GB369765A (en)

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