GB1107527A - Solvent recovery in phthalocyanine synthesis - Google Patents

Solvent recovery in phthalocyanine synthesis

Info

Publication number
GB1107527A
GB1107527A GB3040666A GB3040666A GB1107527A GB 1107527 A GB1107527 A GB 1107527A GB 3040666 A GB3040666 A GB 3040666A GB 3040666 A GB3040666 A GB 3040666A GB 1107527 A GB1107527 A GB 1107527A
Authority
GB
United Kingdom
Prior art keywords
acid
pigment
synthesis
parts
product mixture
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
GB3040666A
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid 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 American Cyanamid Co filed Critical American Cyanamid Co
Publication of GB1107527A publication Critical patent/GB1107527A/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
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0001—Post-treatment of organic pigments or dyes
    • C09B67/0017—Influencing the physical properties by treatment with an acid, H2SO4
    • C09B67/0019—Influencing the physical properties by treatment with an acid, H2SO4 of phthalocyanines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Abstract

A phthalocyanine pigment is obtained from a synthesis product mixture containing an inert water and acid-insoluble organic solvent and synthesis by-products by adding per part by weight of phthalocyanine pigment at least 10 parts of 90 to 100% sulphuric acid at a non-sulphonating temperature of 30 DEG -80 DEG C., agitating to dissolve the pigment, separating the acid solution from the solvent phase and drowning the solution in 50 to 200 parts of water per part of pigment and at least 4 parts of water per part of acid, the organic solvent in the product mixture having a specific gravity such that it separates from the solution of phthalocyanine pigment in sulphuric acid. The synthesis product mixture may be diluted with additional water and acid insoluble organic solvent before addition of sulphuric acid. Separated residual solvent phase may be recycled to a pigment synthesis. Conventional methods of pigment preparation are described using inter alia phthalic acid derivatives, urea and a catalyst.
GB3040666A 1965-08-19 1966-07-06 Solvent recovery in phthalocyanine synthesis Expired GB1107527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US48106565A 1965-08-19 1965-08-19

Publications (1)

Publication Number Publication Date
GB1107527A true GB1107527A (en) 1968-03-27

Family

ID=23910439

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3040666A Expired GB1107527A (en) 1965-08-19 1966-07-06 Solvent recovery in phthalocyanine synthesis

Country Status (3)

Country Link
DE (1) DE1569617A1 (en)
GB (1) GB1107527A (en)
NL (1) NL6611570A (en)

Also Published As

Publication number Publication date
DE1569617A1 (en) 1969-10-23
NL6611570A (en) 1967-02-20

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