| 摘要 |
PURPOSE:To obtain the title compd. selectively in the form of only a pure type A crystal, which is useful as a photoconductive material of electro photographic materials, by condensing o-phthalodinitrile with TiCl4 in an org. solvent at a temp. within a specified range and hydrolyzing the product. CONSTITUTION:o-Phthalodinitrile (A) and TiCl4 (B) in a molar ratio is about 4:1 are added to an org. solvent (C) (e.g., alpha-chloronaphthalene) in an amount of 2-15 times that of the component A, which has been preheated to 160-300 deg.C. They are brought into contact with each other at 170-300 deg.C to thereby condense them, thus obtaining dichlorotitanium phthalocyanine. The product is recovered by filtration with heating, washed and repeatedly treated with hot water till the pH reaches 5-7 to hydrolyze it. If desired, the resulting product is heat- treated in an org. solvent such as quinoline, alpha-chloronaphthalene, etc.
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