Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1987-04-27
1988-10-11
Raymond, Richard L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
540141, C09B 47067
Patent
active
047772514
ABSTRACT:
An improved process for preparing oxytitanium phthalocyanine is provided wherein the condensation reaction of o-phthalodinitrile with titanium tetrachloride is effected in an organic solvent at 170.degree. to 300.degree. C. followed by hydrolysis, the improvement wherein said organic solvent is preliminarily heated at a temperature of 160.degree. to 300.degree. C. prior to initiation of the condensation reaction. The A form of oxytitanium phthalocyanine crystal can selectively be produced in the pure state.
REFERENCES:
patent: 4664997 (1987-05-01), Suzuki et al.
patent: 4701396 (1987-10-01), Hung et al.
Miyagawa Tutomu
Takagishi Iwao
Tanaka Motoaki
Conlin David G.
Mitsubishi Kasei Corporation
Raymond Richard L.
Waco Pure Chemical Industries, Ltd.
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