NOVELTY - Removing gaseous contaminants from feed gas stream comprises: (a) providing the feed gas stream; (b) cooling the stream to first temperature at which liquid phase contaminant and gaseous phase rich in gaseous products are formed, respectively; (c) separating the two phases by gas/liquid separator (4); (d) cooling the gaseous phase to second temperature; (e) cooling the stream to third temperature; (f) introducing the stream into a gas/liquid/solids separation device (12); and (g) removing a gas stream and stream comprising solid contaminant and/or liquid phase contaminant from the device.    USE - The method is useful for removing gaseous contaminants from a feed gas stream (claimed).    ADVANTAGE - The method uses an external refrigerant, which makes the process simple and requiring simple equipments and improves the efficiency of the separation of gaseous contaminants and hydrocarbon, thus the contaminated gas stream is continuously provided, cooled and separated.    DETAILED DESCRIPTION - Removing gaseous contaminants from a feed gas stream containing a gaseous product and gaseous contaminant comprises: (a) providing the feed gas stream; (b) cooling the feed gas stream to a first temperature at which liquid phase contaminant and a gaseous phase rich in gaseous products are formed, respectively; (c) separating the formed two phases by means of a gas/liquid separator (4); (d) cooling the gaseous phase rich in obtained gaseous product to a second temperature; (e) cooling the obtained stream to a third temperature at which solid contaminant and/or liquid phase contaminant and a gaseous phase rich in gaseous products are formed; (f) introducing the obtained stream into a gas/liquid/solids separation device (12); and (g) removing a gas stream rich in gaseous product and a stream which comprises solid contaminant and/or liquid phase contaminant from the gas/liquid/solids separation device.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the process for removing gaseous contaminants from the feed gas stream.    Expansion means (2)    Gas/liquid separator (4)    Heat exchanger (7)    Expander (10)    Gas/liquid/solids separation vessel (12)