Patent ID: 7380413

Claim:
A method which may be used for simultaneously producing hydrogen and carbon monoxide, said method comprising: a) receiving a synthesis as from a synthesis gas production unit, wherein said synthesis gas comprises hydrogen and carbon monoxide; b) decarbonating said synthesis gas in a decarbonation unit; c) desiccating said synthesis gas in a desiccation unit; d) cryogenically separating said desiccated synthesis gas in a cryogenic separation unit; and e) recycling a gas, containing at least about 60% hydrogen, upstream of said decarbonation unit and downstream of said synthesis gas production unit, wherein said gas to be recycled comprises at least one member selected from the group consisting of: 1) a gas from said cryogenic separation; and 2) a portion of a gas upstream of said cryogenic separation unit; further comprising regenerating said desiccation unit with said gas containing at least about 60% hydrogen prior to sending said gas containing at least about 60% hydrogen upstream of said decarbonation unit.