(RU2099129-C1)      The feed gas mixt. consists of a strongly, a moderately and a first and second less strongly, adsorbed component. The second component is of lower volatility than the first. The process for purifying and liquefying the feed gas mixt. w.r.t. the second less strongly adsorbed component, comprises: (a) passing feed gas mixt. (1) through temp. swing adsorption bed contg. adsorbent selective for retention of the strongly adsorbed component to produce adsorption bed satd. with strongly adsorbed component and temp. swing effluent stream enriched in moderately strongly adsorbed component, first and second less strongly adsorbed component; (b) regenerating temp. swing adsorption bed where regeneration comprises: (1) heating temp. swing adsorption bed by heating the first regeneration gas and subsequently passing the heated first regeneration gas through temp. swing adsorption bed in order to vaporise and desorb at least a portion of strongly adsorbed component from temperature swing adsorption bed, (2) cooling temp. swing adsorption bed to temp. of temp. swing adsorption bed in step (a) by passing a second regeneration gas through adsorption bed; (c) passing temp. swing effluent stream through pressure swing adsorption bed contg. an adsorbent selective for retention of moderately strongly adsorbed component to produce an adsorption bed satd. with moderately strongly adsorbed component and a pressure swing effluent steam enriched in first and second less strongly adsorbed component; (d) regenerating pressure swing adsorption bed where the regeneration comprises: (1) depressurising pressure swing adsorption bed to produce depressurisation effluent stream enriched in moderately strongly adsorbed component where first portion is used as, at least, a portion of first regeneration gas in step (b1) and where second portion of depressurisation effluent stream is used, at least, a portion of second regeneration gas in step (b2), (2) re-pressurising pressure swing adsorption bed to pressure of pressure swing adsorption bed in step (c) with third regeneration gas, (e) passing pressure swing effluent stream into distillation column to produce an overhead stream, at least a portion of one or more regeneration gases selected from the gp. consisting of: (1) a first regeneration gas in step (b1), (2) a second regeneration gas in step (b2), (3) a third regeneration gas in step (d2).    USE/ADVANTAGE -   Used as an integrated process for purifying and liquefying a feed gas mixt. w.r.t its less strongly adsorbed component of lower volatility. An important application is the purificn. and liquefaction of a natural gas feed stream w.r.t. its methane/C2 hydrocarbon component.