GB421249A - Improvements in or relating to the manufacture of vat dyes of the dibenzanthrone series - Google Patents

Improvements in or relating to the manufacture of vat dyes of the dibenzanthrone series

Info

Publication number
GB421249A
GB421249A GB735233A GB735233A GB421249A GB 421249 A GB421249 A GB 421249A GB 735233 A GB735233 A GB 735233A GB 735233 A GB735233 A GB 735233A GB 421249 A GB421249 A GB 421249A
Authority
GB
United Kingdom
Prior art keywords
sodium
dibenzanthrone
drying
dihydroxydibenzanthrone
alkali metal
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
GB735233A
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 GB735233A priority Critical patent/GB421249A/en
Publication of GB421249A publication Critical patent/GB421249A/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
    • C09B3/22—Dibenzanthrones; Isodibenzanthrones
    • C09B3/30—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus
    • C09B3/36—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus by etherification of hydroxy compounds

Landscapes

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

Abstract

The Specification as open to inspection under Sect. 91 describes how vat dyes of the dibenzanthrone series may be obtained by converting dihydroxydibenzanthrone into its alkali metal salt, drying, and etherifying the product, e.g. with an alkylating agent, preferably in an inert medium. The alkali metal salts may be obtained by treatment with sodium carbonate, metallic sodium, or by vatting, but the use of caustic soda is to be avoided on account of the subsequent drying process. According to examples, dihydroxydibenzanthrone obtained by oxidation of dibenzanthrone and partial reduction with sodium bisulphite in dilute sulphuric acid, is converted to the sodium salt by means of soda ash, salting, or metallic sodium, and after drying is etherified with ethylene dibromide (see U.S.A. Specification 1,761,624), p-toluene sulphonic isopropyl ester, diphenyl dichloromethane, or benzylidene chloride. The products dye fast shades of red to blue. British Specification 181,304, [Class 2 (iii)], also is referred to.
GB735233A 1933-03-10 1933-03-10 Improvements in or relating to the manufacture of vat dyes of the dibenzanthrone series Expired GB421249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB735233A GB421249A (en) 1933-03-10 1933-03-10 Improvements in or relating to the manufacture of vat dyes of the dibenzanthrone series

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB735233A GB421249A (en) 1933-03-10 1933-03-10 Improvements in or relating to the manufacture of vat dyes of the dibenzanthrone series

Publications (1)

Publication Number Publication Date
GB421249A true GB421249A (en) 1934-12-07

Family

ID=9831470

Family Applications (1)

Application Number Title Priority Date Filing Date
GB735233A Expired GB421249A (en) 1933-03-10 1933-03-10 Improvements in or relating to the manufacture of vat dyes of the dibenzanthrone series

Country Status (1)

Country Link
GB (1) GB421249A (en)

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