PROCESS FOR PURIFICATION OF ARGON FROM OXYGEN

摘要

1469970 Argon LENINGRAD TEKHNOL INST KHOLODIL PROMYSHLENN 5 Dec 1974 [6 Dec 1973 26 April 1974] 52749/74 Heading C1A Oxygen is removed from argon by passing a liquid mixture thereof at 1À5-30 kp./cm.2 through synthetic A-type zeolites having a pore size of 2À8-4À2 Š and a temperature of 87-140‹ K. and thereafter desorbing the oxygen from the zeolite by reducing the pressure to atmospheric and finally evacuating to a pressure of 1-10-2 mmHg to remove residual traces of oxygen. The zeolite may be heated to 250- 300‹ K. between the desorption and evacuation steps. Stepwise changes in temperature during the adsorption stage are described.