B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/04 (2006.01) B01D 53/047 (2006.01) C01B 3/50 (2006.01) C01B 3/56 (2006.01) C01B 31/18 (2006.01) F25J 3/02 (2006.01)
Patent
CA 2088413
PROCESS FOR OBTAINING HIGH-PURITY HYDROGEN AND HIGH-PURITY CARBON MONOXIDE Abstract of the Disclosure An improvement in a process for the production of high-purity hydrogen and high-purity carbon monoxide by the separation of an extensively dry and CO2-free H2/CO crude gas mixture, also containing methane, by means of pressure swing adsorption and one-stage partial condensation, where- in, the H2/CO crude gas mixture is subjected to a pressure swing adsorption process, producing a high-purity hydrogen product stream, while the CO-rich gas obtained in the rege- neration during the pressure swing adsorption process is compressed, cooled, at least partially condensed, and con- ducted into a phase separator wherein it is separated into a gaseous H2-rich fraction and a liquid CO-rich fraction, whereupon the gaseous H2-rich fraction is heated and admixed to the H2/CO crude gas mixture before the latter is fed into the pressure swing adsorption. The improvement is that at least a portion of the liquid CO-rich fraction from the phase separator is at least partially expanded, heated, and conducted into the lower region of a double distillation column having an upper and lower region, a liquid methane fraction being withdrawn from the bottom of the column, a liquid high-purity carbon monoxide product fraction being withdrawn from the lower part of the upper region of the column, and a gaseous CO-rich fraction being withdrawn from the head of the column.
Linde Aktiengesellschaft
Ogilvie And Company
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