Refrigeration – Processes – Circulating external gas
Patent
1983-04-25
1984-10-23
Sever, Frank
Refrigeration
Processes
Circulating external gas
62 34, 62 39, F25J 302
Patent
active
044786212
ABSTRACT:
Processes for the separation of carbon monoxide from feed gas streams polluted with nitrogen are disclosed, in which the feed gas streams, which preferably include hydrogen and methane therein, are supplied to a distillation column, and including the steps of distilling the feed gas stream to produce as the sump product a first carbon monoxide stream of substantially pure liquid carbon monoxide, and a distillation gas stream containing nitrogen therein, heating the sump in the lower portion of the distillation column by contact with a second carbon monoxide stream, withdrawing the sump product from the distillation column, expanding the withdrawn sump product to reduce its temperature, cooling the distillation gas stream in the upper portion of the distillation column by contact with at least a portion of the expanded sump product, recycling at least a portion of the first carbon monoxide stream to provide the second carbon monoxide stream, and withdrawing at least a portion of the first carbon monoxide stream as a product stream.
REFERENCES:
patent: 3407146 (1968-10-01), Becker et al.
patent: 4102659 (1978-07-01), Martin
patent: 4311496 (1982-01-01), Fabian
Linde Aktiengesellschaft
Sever Frank
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