PROCESS FOR RECOVERY OF ANHYDROUS HYDROGEN CHLORIDE FROM MIXTURES WITH NON-CONDENSABLE GASES

摘要

A process is provided for the recovery of hydrogen chloride in anhydrous form (44) from a dry mixture of hydrogen chloride with one or more non-condensable gases and which may also contain components heavier than hydrogen chloride (26), which process comprises distilling (34) the mixture to produce an overheads stream (36) containing the non-condensable gases and 95 percent or more by weight of the hydrogen chloride in the mixture and a bottoms stream (38) containing 95 percent or greater by weight of all components heavier than hydrogen chloride, and compressing (40) and refrigerating (42) the overheads stream whereby a selected proportion of the hydrogen chloride in the overheads stream is produced in a liquid anhydrous form containing 50 parts per million or less by weight of water.