Patent ID: 11883778
Assignee: CAMERON INTERNATIONAL CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  F  Y | IPC B  C  F

Claim 6:
7. An acid gas purification system, comprising:
a membrane separation unit that produces a permeate stream enriched in CO2 and/or H2S and a retentate stream from a feed stream;
a conditioner to reduce a temperature of the permeate stream; and
a cryogenic fractionator to separate acid gases from the cooled permeate stream, the cryogenic fractionator having an overhead that is compressed and blended with the retentate stream,
wherein the cryogenic fractionator is a frozen CO2 fractionator comprising a stripping section, a rectification section, and a mid-section, wherein the mid-section comprises a side processor comprising an empty section configured to return a solid to the frozen CO2 fractionator, and wherein the side processor further comprises a condenser that produces a liquid level in the side processor.