| 摘要 |
PURPOSE:To obtain the title compd. selectively and easily in the form of a type B crystal with good reproducibility, which has excellent electrophotographic characteristics, by feeding o-phthalodinitrile and TiCl4 into an org. solvent, elevating the temp. of the mixture at a specified heating rate to carry out a condensation reaction and hydrolyzing the product. CONSTITUTION:o-Phthalodinitrile (A) and TiCl4 (B) in a molar ratio of about 4:1 are fed into an org. solvent (C) having a b.p. of not lower than 170 deg.C (e.g., alpha-chloronaphthalene) in an amount of 2-15 times that of the component A. The temp. of the mixture is elevated on an oil bath with stirring at such a heating rate that the temp. is raised from 100-170 deg.C over a period of 2.5hr or longer to carry out a condensation reaction at 170-300 deg.C, thus obtaining dichlorotitanium phthalocyanine. The product is repeatedly treated with hot water by using an excess of water till the pH reaches 5-7 to hydrolyze it. If desired, the product is heat-treated in an org. solvent such as quinoline, alpha- chloronaphthalene, etc.
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