Ethyl chloride recovery

Claim 1

THE PROCESS OF RECOVERING ETHYL CHLORIDE IROM A REACTION PRODUCTS STREAM CONTAINING ETHANE AS AN IMPURITY, THE ETHANE: ETHYL CHLORIDE MOLE RATIO BEING FROM 0.75:1.0 TO 1.5:1.0, COMPRISING CONDENSING FROM 30 TO 40 PERCENT OF THE ETHYL CHLORIDE AT A TEMPERATURE ABOVE 90* F., PASSING THE VAPOR AND LIQUID FORMED TO A PRIMARY FRACTIONATOR, CONTACTING THE VAPOR AND CONDENSING REFLUX, DISCHARGING THE VAPOR AND CONDENSING FROM 85 TO 95 PERCENT OF THE ETHYL CHLORIDE THEREIN AT A TEMPERATURE ABOVE -20* F., PASSING THE VAPOR AND LIQUID SO FORMED TO A SECONDARY FRACTIONATOR, CONTACTING THE VAPOR THEREIN WITH A SECONDARY REFLUX, THEN DISCHARGING THE VAPOR AND CONDENSING SUBSTANTIALLY ALL THE ETHYL CHLORIDE THEREIN AT A TEMPERATURE ABOVE -90* F., DISCHARGING THE VAPOR AND RETURNING THE LIQUID AS THE SECONDARY REFLUX, RETURNING LIQUID FROM THE SECONDARY FRACTIONATOR TO THE PRIMARY FRACTIONATOR AS THE PRIMARY REFLUX, AND WITHDRAWING CONCENTRATED LIQUID ETHYL CHLORIDE FROM THE PRIMARY FRACTIONATOR.