NOVELTY - Removing contaminant from a liquid phase containing feed stream having temperature of less than -40 degrees C and pressure of less than 110 bars, comprises: providing the feed stream; lowering pressure and/or temperature of the feed stream to obtain a stream having pressure of 30-70 bars and temperature of -50 to -85 degrees C; cooling the stream to form a slurry of solid contaminant, liquid phase contaminant and a gaseous phase; introducing the slurry into a separation device (8); and removing a gas stream rich and a stream of solid contaminant and/or liquid phase contaminant from the device.    USE - The process is useful removing solid contaminant, liquid phase contaminant and gaseous contaminants (including carbon dioxide and/or hydrogen sulfide) from a liquid phase containing feed stream to give a purified feed gas stream (all claimed).    ADVANTAGE - The process utilizes the specific sequence of cooling steps thus the energy efficiency of the overall processing can be improved.    DETAILED DESCRIPTION - Removing contaminant from a liquid phase containing feed stream having a temperature of less than -40 degrees C and a pressure of less than 110 bars, comprises: providing the feed stream; lowering the pressure and/or the temperature of the feed stream to obtain a stream having a pressure of 30-70 bars and a temperature of -50 to -85 degrees C; cooling the stream as obtained in previous step further to a temperature at which a slurry is formed which comprises solid contaminant, liquid phase contaminant and a gaseous phase rich in gaseous product; introducing the obtained slurry into a gas/liquid/solids separation device (8); and removing from the separation device a gas stream rich in gaseous product and a stream comprising solid contaminant and/or liquid phase contaminant. The feed stream comprises a liquid phase or a liquid phase and a gaseous phase, the liquid phase comprises liquid phase contaminant and the gaseous phase comprises a gaseous product and gaseous contaminants. INDEPENDENT CLAIMS are also included for:    (1) purified feed gas stream obtained by the process; and    (2) liquefying a feed gas stream comprising purifying the feed gas stream by the above process, followed by liquifying the purified feed gas stream.    DESCRIPTION OF DRAWING(S) - The figure illustrates a process of removing contaminant from a liquid phase containing feed stream.    Conduits (1, 3, 5, 7)    Turbo expander (2)    Heat exchanger (4)    Valve (6)    Gas/liquid/solids separation device (8)