Process and apparatus for the production of high purity...

Details Process and apparatus for the production of high purity... Process and apparatus for the production of high purity...

C - Chemistry, Metallurgy

01

B

23/29, 23/401

C01B 3/56 (2006.01) B01D 53/047 (2006.01) C01B 3/48 (2006.01) C01B 31/20 (2006.01)

Patent

CA 1334888

Highly purified gaseous hydrogen and liquid carbon dioxide are produced from a steam reformer/shift converter by passing the effluent from the latter through a multibed hydrogen PSA unit followed by an uncoupled carbon dioxide PSA unit. The carbon dioxide PSA unit produces a hydrogen-rich stream which is recycled to the feed to the steam reformer, a carbon dioxide-rich recycle stream which is recycled to the carbon dioxide PSA unit feed and a carbon dioxide-rich product stream which is introduced under pressure to a liquifier. A waste stream from the liquifier is recycled to the carbon dioxide PSA unit feed. A portion of the carbon dioxide-rich product stream is withdrawn from the compressor at a stage such that its pressure is higher than that of the carbon dioxide PSA unit and returned thereto as a cocurrent purge preceding bed regeneration to obtain product.

595517

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