Purification of raw gas for ammonia synthesis

Details Purification of raw gas for ammonia synthesis Purification of raw gas for ammonia synthesis

C - Chemistry, Metallurgy

10

K

183/24, 48/25

C10K 1/32 (2006.01) B01D 53/047 (2006.01) C01B 3/02 (2006.01)

Patent

CA 1257206

Abstract Purification of Raw Gas For Ammonia Synthesis Ammonia synthesis gas is made from a raw gas comprising hydrogen, carbon dioxide and medium boiling point gases including nitrogen in excess of the proportion required in ammonia synthesis gas, by a pressure swing adsorption process characterised by feed- ing to the adsorbent a raw gas in which hydrogen and total medium boiling point gases are present in a volume ratio is the range 1.25 to 2.5, and the medium boiling point gases comprise nitrogen to the extent of at least 90% v/v on the total of such gases. Preferred ways of making the raw gas, of ensuring purity of the product gas and of recovering useful heat are described.

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