Color stabilization of refined dicarboxylic acid anhydrides

Details Color stabilization of refined dicarboxylic acid anhydrides Color stabilization of refined dicarboxylic acid anhydrides

1972-10-31

1976-08-17

Moatz, Harry I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30760

Patent

active

039754081

ABSTRACT:
Refined dicarboxylic acid anhydrides such as maleic anhydride are provided with improved color stability by a treating agent selected from the group consisting of chlorine and halides or elements in group IVb of the periodic table, the transition elements, vanadium, chromium, manganese, mercury, silicon, phosphorus, bismuth, antimony, lead, cerium and sulfur.

REFERENCES:
patent: 2296218 (1942-09-01), Middleton
patent: 2425509 (1947-08-01), Clifford et al.
patent: 2432470 (1947-12-01), Clifford
patent: 3564022 (1971-02-01), Manoff et al.
patent: 3586703 (1971-06-01), Martinez et al.
patent: 3775436 (1973-11-01), Stenseth

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