Process of and apparatus for recovering condensables from a gas stream

Claim 1

THE IMPROVEMENT IN THE PROCESS OF RECOVERING CONDENSABLES FROM A GAS STREAM WHICH IS ALTERNATELY PASSED THROUGH AT LEAST THREE SEPARATE BEDS CONTAINING FIXED ADSORBENT MATERIAL TO REMOVE THE CONDENSABLES FROM THE GAS STREAM AND WHICH BEDS ARE SIMULTANEOUSLY AND CONTINUOUSLY BUT ALTERNATELY GOIN THROUGH ADSORPTION, HEATING AND COOLING CIRCUITS COMPRISING, CIRCULATING A CLOSED SUPPLY OF HETING GAS SUCCESSIVELY AND CONTINUOUSLY THROUGH THE HEATING CIRCUIT WHICH IS SEPARATE AND DISTINCT FROM THE ADSORPTION CIRCUIT AND THE COOLING CIRCUIT, SAID HEATING CIRCUIT INCLUDING A HEATER, A SATURATED BED, A CONDENSER, AND A SEPARATOR THEREBY DRIVING OUT THE CONDENSABLES FROM THE SATURATED BED AND CONDENSING AND SEPARATING THE CONDENSABLES FROM THE CLOSED SUPPLY OF HEATING GAS; AND SIMULTANEOUSLY AND CONTINUOUSLY CIRCULATING A CLOSED SUPPLY OF COOLING GAS SUCCESSIVELY AND CONTINUOUSLY THROUGH THE COOLING CIRCUIT WHICH IS SEPARATE AND DISTINCT FROM THE ADSORPTION CIRCUIT AND THE HEATING CIRCUIT, SAID COOLING CIRCUIT INCLUDING A BED WHICH HAS BEEN HEATED, A CONDENSER AND A SEPARATOR WHEREBY THE HEATED BED IS COOLED AND THE CONDENSABLES ARE CONDENSED AND SEPARATED FROM THE SUPPLY OF COOLING GAS.