A high performance liquid chromatographic method has been developed for the simultaneous determination of 3-chlorophthalic anhydride,4-chlorophthalic anhydride,3-chlorophthalic acid and 4-chlorophthalic acid.

A series of chloro-1,4-dihydroxyanthraquinones were synthesized by the reaction of hydroquinone with chlorophenylanhydrides and anhydrous aluminium chloride as catalyst according to Friedel-Crafts reaction.

Synthesis methods for monochlorophthalic anhydride,particularly the process for manufacture of monochlorophthalic anhydride by liquid phase oxidation are reviewed in this paper.

A process approaching 3 and 4 chlorophthalic anhydride in high purity via chloriation of o xylene, oxidation of monochloro o xylene by air in gas phase,and separation of 3 and 4 chlorophthalic anhydride afterwards by distillation is described.

4-Chlorophthalic anhydride is an important chemical intermediate which is broadly used in producing dyes, plastic, medicines, and pesticides.

A high performance liquid chromatographic method has been developed for the simultaneous determination of 3-chlorophthalic anhydride,4-chlorophthalic anhydride,3-chlorophthalic acid and 4-chlorophthalic acid.

In this paper, the synthesis methods of tetracarboxydiphthalic ether dianhydride (ODPA)was introduced, which was prepared with 4-chlorophthalic anhydride.

Catalytic hydrogenolysis-dehalogenation of 4,5-dichlorophthalic anhydride as model compound possessed aryl chlorides on the supported bimetallic Pd catalysts with different second metallic constituents was studied.