Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Reexamination Certificate
2000-01-04
2001-11-27
Spitzer, Robert H. (Department: 1724)
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
C095S096000, C095S117000, C095S139000, C095S143000
Reexamination Certificate
active
06322611
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a process and to an installation for the production of CO (carbon monoxide) from a supply gas containing essentially, in addition to CO, hydrogen H
2
and other constituents, particularly CO
2
(carbon dioxide), methane and water.
SUMMARY OF THE INVENTION
The invention has for its object to provide a technique permitting producing economically CO with high purity and at a directly usable pressure.
To this end, in the process according to the invention:
in a first step, the supply gas is sent to a pressure swing adsorption (PSA) unit which contains an adsorbent having a low affinity for hydrogen and the CO and a high affinity for said other constituents; and
the production gas is sent from the PSA unit, consisting essentially of a mix of CO/H
2
mixture, to a unit for the at least partial purification of the CO, of the permeation type provided with membranes with a CO/H
2
selectivity, supplying at its outlet pure CO.
The installation according to the invention, adapted to practice the process defined above, comprises:
a pressure swing adsorption (PSA) unit which contains an adsorbent having a low affinity for the hydrogen and the CO and a high affinity for said other constituents, this unit being connected to a source of said supply gas; and
a unit for at least partially purifying the CO, of the permeation type, whose inlet is connected to the outlet for the production of CO/H
2
mixture from the PSA unit, the permeation being provided with membranes having a high CO/H
2
selectivity.
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L'Air Liquide, Societe Anonyme pour L'Exploitation des
Spitzer Robert H.
Young & Thompson
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