GB344336A - Improvements in and relating to the production of dyestuffs - Google Patents

Improvements in and relating to the production of dyestuffs

Info

Publication number
GB344336A
GB344336A GB2576029A GB2576029A GB344336A GB 344336 A GB344336 A GB 344336A GB 2576029 A GB2576029 A GB 2576029A GB 2576029 A GB2576029 A GB 2576029A GB 344336 A GB344336 A GB 344336A
Authority
GB
United Kingdom
Prior art keywords
dyes
sodium
dibenzanthrone
blue
dyeing
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
GB2576029A
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.)
Scottish Dyes Ltd
Original Assignee
Scottish Dyes Ltd
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 Scottish Dyes Ltd filed Critical Scottish Dyes Ltd
Priority to GB2576029A priority Critical patent/GB344336A/en
Publication of GB344336A publication Critical patent/GB344336A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Abstract

Dibenzanthrone dyes; vat and sulphuretted dyes, dyeing with.-Alkali-soluble dyestuffs are made by treating dibenzanthrone or its substitution products with sulphides of phosphorus, or substances yielding these, at a temperature of 250 DEG C. or over. The alkaline solutions of the products may be used for dyeing; or the products may be dyed from a sodium sulphide or hydrosulphite vat. In examples, (1) dibenzanthrone is heated with phosphorus pentasulphide (a) to 300 DEG C. to give a product which, in alkaline solution, dyes cotton in blue-black shades becoming violet-red on after-treatment with sodium hypochlorite solution, and (b) to 250 DEG C. to give a product dyeing cotton in bluish-red shades from an alkaline bath, and (2) Bz2:Bz21-dimethoxydibenzanthrone is heated with a mixture of red phosphorus and sulphur in a current of carbon dioxide to 250 DEG C.; the product, when dissolved in a solution of sodium carbonate, sodium hydroxide or ammonia, dyes wool or silk in blue-grey shades changing to blue-violet when after treatment with sodium perborate.
GB2576029A 1929-08-23 1929-08-23 Improvements in and relating to the production of dyestuffs Expired GB344336A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2576029A GB344336A (en) 1929-08-23 1929-08-23 Improvements in and relating to the production of dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2576029A GB344336A (en) 1929-08-23 1929-08-23 Improvements in and relating to the production of dyestuffs

Publications (1)

Publication Number Publication Date
GB344336A true GB344336A (en) 1931-02-23

Family

ID=10232855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2576029A Expired GB344336A (en) 1929-08-23 1929-08-23 Improvements in and relating to the production of dyestuffs

Country Status (1)

Country Link
GB (1) GB344336A (en)

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