PURIFICATION OF CARBOXYLIC ACID STREAMS

摘要

The purification of acetic acid to remove very minor amounts of iodine in the parts per billion range is effected by means of a two-column distillation of the acid containing such iodine contamination in the presence of a chemical agent which is either an alkali metal compound, an alkaline earth metal compound, or a mixture of either of these compounds with hypophosphorous acid.