Refrigeration – Processes – Circulating external gas
Patent
1988-10-06
1989-09-26
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 39, 62 42, 62 44, F25J 302
Patent
active
048697427
ABSTRACT:
The present invention is an improved process for the production of nitrogen and oxygen that uses a double distillation column arrangement. The improvement to the process is the recycling of at least a portion of the oxygen-enriched waste stream to the bottom of the high pressure column. As a result of this improvement, the process is capable of making a nitrogen product with high purity (e.g., 5 ppm oxygen product) at high pressures (e.g., 40 to 150 psia) while simultaneously producing high purity oxygen (e.g., 99.6% oxygen). Nitrogen is produced only from the high pressure column.
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L. Celar, et al., "Flexible Process of Pressure Nitrogen and Low Pressure Oxygen Production".
Roden Thomas M.
Thorogood Robert M.
Air Products and Chemicals Inc.
Capossela Ronald C.
Jones II Willard
Marsh William F.
Simmons James C.
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