Cyanide and ammonia removal from synthesis gas

Details Cyanide and ammonia removal from synthesis gas Cyanide and ammonia removal from synthesis gas

1997-02-07

2000-08-22

Griffin, Steven P.

Chemistry: fischer-tropsch processes; or purification or recover

Treatment of feed or recycle stream

423236, 423237, C07C 2706, B01D 5354

Patent

active

061073539

ABSTRACT:
Cyanide and ammonia are removed from a gas, such as a synthesis gas, by catalytically hydrolyzing cyanide in the gas to ammonia, water scrubbing the hydrolyzed gas to dissolve ammonia and at least a portion of remaining cyanide, and optionally, contacting the scrubbed gas with an adsorbent for cyanide and ammonia to form a clean gas containing less than 50 vppb of a combined total of cyanide and ammonia. The clean synthesis gas is then fed into a hydrocarbon synthesis reactor wherein it produces hydrocarbons with substantially reduced catalyst deactivation and cleaner hydrocarbon products.

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patent: 5068254 (1991-11-01), Posthuma
patent: 5260239 (1993-11-01), Hsia
patent: 5463168 (1995-10-01), Audeh et al.
patent: 5466427 (1995-11-01), Rumpf et al.
patent: 5486313 (1996-01-01), De Jong

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