Process to produce high pressure methane gas
Patent
·
OSTI ID:6540840
This patent describes a process to produce high pressure methane gas comprising: (A) cooling a gaseous feed comprising methane and nitrogen; (B) introducing cooled feed into a single column cryogenic rectification plant and producing methane liquid therein; (C) partially vaporizing methane liquid and dividing remaining methane liquid into first and second portions; (D) expanding the first portion and heating the expanded first portion by indirect heat exchange with the cooling gaseous feed to produce methane gas; and (E) pumping the second portion to a high pressure and heating the high pressure portion by indirect heat exchange with the cooling gaseous feed to produce high pressure methane gas.
- Assignee:
- Union Carbide Corp., Danbury, CT
- Patent Number(s):
- US 4778498
- OSTI ID:
- 6540840
- Country of Publication:
- United States
- Language:
- English
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