Acetylene recovery process

Claim 1

PROCESS FOR RECOVERING ACETYLENE FROMGAS STREAMS CONTAINING ACETYLENE, CONDENSALBE MATERIALS, NON-CONDENSABLE HIGHER ACETYLENES, AND OTHER NON-CONDENSALBE MATERIALS WHICH COMPRISES: COOLING SAID GAS STREAM IN A FIRST COOLING MEANS TO ABOUT ROOM TEMPERATURE TO REMOVE A PORTION OF SAID CONDENSABLE MATERIALS THEREFROM; FURTHER COOLING SAID GAS STREAM IN CREEPING BED REGENERATORS TO ABOUT -120*F. TO -160*F. UNDER A PRESSURE OF LESS THAN ABOUT 3 ATMOSPHERES ABSOLUTE TO REMOVE ADDITIONAL AMOUNTS OF CONDENSABLE IMPURITIES; CONTACTING THE COLD GAS STREAM WITH AN ADSORBENT AT A TEMPERATURE BELOW 32*F. TO REMOVE FINAL AMOUNTS OF CONDENSABLE MATERIALS AND AT LEAST SOME AMOUNTS OF HIGHER ACETYLENES; CONTACTING THE RESULTANT PARTIALLY PURIFIED GAS STREAM AT A TEMPERATURE BELOW ABOUT -120*F. AND A PRESSURE OF LESS THAN ABOUT 2 ATMOSPHERES ABSOLUTE WITH A SOLVENT WHICH SELECTIVELY ABSORBS AETYLENE TO SEPARATE THE ACETYLENE FROM SOME OF THE RELATIVELY LESS SOLUBLE IMPURITIES AND FROM MOST OF THE SUBSTANTIALLY INSOLUBLE NON-CONDENSABLE MATERIALS IN THE GAS STREAM; THEN VENTING THE REMAINING RELATIVELY LESS SOLUBLE IMPURITIES FROM THE SOLVENT; AND THEREAFTER RECOVERING THE ACETYLENE FROM THE SOLVENT.