927. HALE, W. J. Organic Anhydrides. United States Patent 2,117,554, May 17, 1938; appl. filed Sept. 27, 1934, Serial No. 745,831; 16 claims (Cl. 260-123). Chem. Abs., vol. 32, 1938, p. 5004.

Patent Abstracts

927. HALE, W. J. Organic Anhydrides. United States Patent 2,117,554, May 17, 1938; appl. filed Sept. 27, 1934, Serial No. 745,831; 16 claims (Cl. 260-123). Chem. Abs., vol. 32, 1938, p. 5004.

Organic compound containing a labile H atom adjacent to a nonmetallic element other than C (such as HOAc to form Ac₂O) is treated with CO < 5-1,000 atm. pressure and at temperatures of -10º to -20º in the presence of an H halide, such as Hl, and a metal salt, such as Cu₂Cl₂, and the anhydride formed is distilled. Gives various examples, with details.

HALLER, W. See abs. 3918, 3919, 3921.

HAMA, Y. See abs. 3715.