Process for the production of acetylene-free ethylene

Claim 1

A PROCESS FOR THE PRODUCTION OF ACETYLENE-FREE ETHYLENE FROM A GAS MIXTURE CONTAINING LOW ALIPHATIC HYDROCARBONS, COMPRISING THE STEPS OF SUCCESSIVELY COMPRESSING THE GAS MIXTURE, COOLING THE COMPRESSED GAS MIXTURE IN COUNTER-CURRENT WITH SEPARATION PRODUCTS OBTAINED FROM SAID GAS MIXTURE, AT LEAST PARTIALLY LIQUEFYING THE COOLED AND COMPRESSED GAS MIXTURE THEREBY SEPARATING A C2-MIXTURE CONSISTING OF C2-HYDROCARBONS ONLY, INTRODUCING THE C2-MIXTURE INTO A SEPARATING COLUMN TO OBTAIN ETHANE AS SUMP LIQUID AT THE BOTTOM AND AN ETHYLENE-ACETYLENEMIXTURE AT THE TOP OF THE SEPARATING COLUMN, INTRODUCING THE ETHYLENE-ACETYLENE-MIXTURE NEAR THE BOTTOM AND ACETONE OF SCRUBBING TEMPERATURE A DETERMINABLE DISTANCE BELOW THE TOP INTO AN ACETONE SCRUBBING COLUMN TO OBTAIN A PURE ETHYLENE PRODUCT IN THE TOP OF THE ACETONE SCRUBBING COLUMN, WITHDRAWING AN ACETYLENE AND ETHYLENE CONTAINING ACETONE SOLUTION FROM THE BOTTOM OF THE ACETONE SCRUBBING COLUMN, LIBERATING DISSOLVED ETHYLENE FROM THE SOLUTION BY HEAT EXCHANGE WITH WARM REGENERATED ACETONE AND RETURNING THE LIBERATED ETHYLENE TO THE ACETONE SCRUBBING COLUMN, REGENERATING THE RESULTING ACETONE SOLUTION IN AN ACETONE REGENERATING COLUMN TO REMOVE THE ACETYLENE, RETURNING REGNERATED ACETONE AFTER HEAT EXCHANGE WITH COLD ACETYLENE AND ETHYLENE CONTAINING ACETONE TO THE ACETONE SCRUBBING COLUMN, WITHDRAWING PART OF THE ETHYLENE PRODUCT OBTAINED IN THE TOP OF THE ACETONE SCRUBBING COLUMN, COMPRESSING SAID PART OF ETHYLENE, COOLING IT IN COUNTER-CURRENT HEAT EXCHANGE WITH THE ETHYLENE PRODUCT, LIQUEFYING IT IN A CONDENSATOR-EVAPORATOR IN THE BOTTOM OF THE SEPARATING COLUMN TO HEAT THE SUMP LIQUID OF SAID