2STULTS, JEFFREYS. Process for the preparation of oxydiphthalic anhydride and acyloxyphthalic anhydrides : EP,0460687 [ P ], 1991 - 12 - 09.
3BERDAHL R, MATSCH P A, NYE S A. Method for preparing oxybisphtha - limides : US,4933469 [ P]. 1990 - 06 - 12.
4SCHWARTZ, WILLIS T. Process for the preparation of oxydiphthalic anhydrides : US ,4837404 [ P]. 1989 - 06 - 06.
5HAY A S. 2,2.3,3'- Tetracarboxydiphenyl ether dianhydride : GE,2416594 [ P]. 1975 - 01 - 16.
6MATSUMOTO I D. Oxydiphthalic acids or their anhydrides: JP, 80136246 [ P]. 1980 - 10 - 23.
7JrAALINGTON O E, JrWALTE V J. Method for making aromatic etherimides : EP,0119576 [ P ]. 1984 - 09 - 26.
8KIYOURA TADAMITSU. Preparation of oxy - diphtalic acid and anhydride : JP, 80122738 [ P ]. 1980 - 09 - 20.
9DELIACOLETTA, WILLIAMS. Prepared by decarbonylation of trimellitic anhydride with Pd/C following the procedure of Verbicky [J]. Tetrahedron Letters, 1982,23 (4) :371-372.
10MARVEL C S, RESSWEILER J H. Polymeric Phthalocyanines [J]. J. Am. Chem. Soc., 1958, 80:1197.
