Refrigeration – Processes – Circulating external gas
Patent
1989-04-27
1990-10-30
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 28, F25J 302
Patent
active
049666126
ABSTRACT:
In a process for the separation of hydrocarbons from a hydrocarbon mixture which optionally contains components boiling lower than methane, the crude gas stream is partially condensed and separated into a gaseous fraction and a liquid fraction. The liquid fraction is introduced into a rectification column wherein further separation is performed. The residual gas obtained at the head of the rectification column is partially condensed and introduced into a scrubbing column wherein the condensed portion of the residual gas is used as a scrubbing medium to scrub out low-boiling components from the separated, gaseous fraction. For covering the refrigeration requirement of this process, a portion of the residual gas from the rectification column, prior to being fed into the scrubbing column, is branched off and expanded for production of refrigeration. After heat exchange with process streams to be cooled, this portion of the residual gas stream is readmixed to the residual gas stream of the rectification column.
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patent: 4486209 (1984-12-01), Fabbri et al.
patent: 4596588 (1986-06-01), Cook
patent: 4597788 (1986-07-01), Apffel
patent: 4676812 (1987-06-01), Kummann
patent: 4707171 (1987-11-01), Bauer
patent: 4711651 (1987-12-01), Sharma et al.
patent: 4718927 (1988-01-01), Bauer et al.
Capossela Ronald C.
Linde Aktiengesellschaft
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