NOVELTY - A feed gas containing hydrogen, methane and nitrogen is cooled in heat exchanger (7) and partially condensed. Condensed feed is sent to phase separator (31), and gas is sent to nitrogen wash column (45). Liquid nitrogen is supplied, and ammonia synthesis gas (57,67,69) is removed. Liquid from phase separator is expanded and sent to separation column (19). A nitrogen enriched gas stream (43) is removed from top, and a nitrogen depleted stream (39) is removed from bottom. Thus, ammonia synthesis gas and pure methane are produced.    USE - Process for production of ammonia synthesis gas and pure methane.    DETAILED DESCRIPTION - A feed gas containing 75% or more of hydrogen and methane and nitrogen, preferably 5% or more of nitrogen is cooled in a heat exchanger and partially condensed. The condensed feed is sent to a phase separator, and resulting gas is sent to a nitrogen wash column. Liquid nitrogen is supplied to the top of the nitrogen wash column, and ammonia synthesis gas is removed from the top of the nitrogen wash column. The liquid from the phase separator is expanded and sent to a separation column. A nitrogen enriched gas stream is removed from the top of the column and a nitrogen depleted liquid stream rich in methane is removed from the bottom of the column. The nitrogen depleted liquid stream is vaporized to form a pure methane product (71,73). Thus, ammonia synthesis gas and pure methane are produced. An INDEPENDENT CLAIM is included for apparatus for production of ammonia synthesis gas, which has heat exchanger (7), phase separator (31), a conduit for sending the partially condensed feed to the phase separator, nitrogen wash column, separation column (19), a conduit for sending gas from the phase separator to the nitrogen wash column, a conduit for sending liquid nitrogen to the top of the nitrogen wash column, a conduit for removing ammonia synthesis gas from the top of the nitrogen wash column, a valve (37) for expanding liquid from the phase separator connected to the separation column via a conduit, a conduit for removing a nitrogen enriched gas stream from the top of the column and a conduit for removing nitrogen depleted liquid stream rich in methane from the bottom of the column.    DESCRIPTION OF DRAWING(S) - The drawing shows the flow sheet explaining production of ammonia synthesis gas and pure methane.    Portion of feed gas (3)    Gas (6)    Heat exchanger (7)    Liquid components (13,47)    Separation column (19)    Bottom reboiler (21)    Phase separator (31)    Valve (37)    Nitrogen depleted stream (39)    Nitrogen enriched gas stream (43)    Nitrogen wash column (45)    Nitrogen wash column (55,95)    Ammonia synthesis gas (57,67,69)    Pure methane product (71,73)    Top condenser (75)