GB235556A - Improved manufacture of sulphur dyestuffs - Google Patents

Improved manufacture of sulphur dyestuffs

Info

Publication number
GB235556A
GB235556A GB14699/25A GB1469925A GB235556A GB 235556 A GB235556 A GB 235556A GB 14699/25 A GB14699/25 A GB 14699/25A GB 1469925 A GB1469925 A GB 1469925A GB 235556 A GB235556 A GB 235556A
Authority
GB
United Kingdom
Prior art keywords
copper
sulphur
cuprocyanide
dyestuff
sulphide
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
GB14699/25A
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.)
Agfa Gevaert NV
Original Assignee
Aktiengesellschaft fuer Anilinfabrikation GmbH
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 Aktiengesellschaft fuer Anilinfabrikation GmbH filed Critical Aktiengesellschaft fuer Anilinfabrikation GmbH
Publication of GB235556A publication Critical patent/GB235556A/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
    • C09B49/00—Sulfur dyes
    • C09B49/10—Sulfur dyes from diphenylamines, indamines, or indophenols, e.g. p-aminophenols or leucoindophenols

Landscapes

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

Abstract

Sulphuretted dyes are prepared by conducting the sulphurization in presence of a copper compound in which the copper is not present as metallic kation; the formation of copper sulphide is thereby avoided and clearer shades are produced; complex copper compounds such as alkali cuprocyanide are suitable. In examples the leuco-indophenol obtained from 1-phenylaminonaphthalene-8-sulphonic acid and p-aminophenol is refluxed with sodium sulphide, sulphur and a solution of potassium cuprocyanide, the dyestuff obtained yielding yellow-green dyeings on cotton; 3-amino-6-oxydiphenazine is heated with sodium sulphide, sulphur and potassium cuprocyanide to obtain a dyestuff which dyes cotton yellow-red. Specifications 11863/04 and 14543/05 are referred to.
GB14699/25A 1924-06-14 1925-06-05 Improved manufacture of sulphur dyestuffs Expired GB235556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE235556X 1924-06-14

Publications (1)

Publication Number Publication Date
GB235556A true GB235556A (en) 1926-05-06

Family

ID=5897392

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14699/25A Expired GB235556A (en) 1924-06-14 1925-06-05 Improved manufacture of sulphur dyestuffs

Country Status (1)

Country Link
GB (1) GB235556A (en)

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