Cryogenic process for fractionally removing acidic gases from ga

Details Cryogenic process for fractionally removing acidic gases from ga Cryogenic process for fractionally removing acidic gases from ga

1982-06-29

1985-07-16

Sever, Frank

Refrigeration

Processes

Circulating external gas

55 68, 55 73, F25J 300, F25J 302

Patent

active

045294240

ABSTRACT:
A process is described for stripping acidic gases, mainly hydrogen sulphide and carbon dioxide, from natural gas or synthesis gas, especially when the percentages of such acidic gases are high and the conventional processes become economically objectionable.
The process is based on the use of a number of selective solvents, generally belonging to the class of esters, ethers, mixed ester-ethers and lactones, in combination with sequential absorbing cycles which start from the stripping of hydrogen sulphide, and comprise the regeneration of the solvents used by several expansion cycles: H.sub.2 S and CO.sub.2 are recovered and the regenerated solvents recycled.

REFERENCES:
patent: 1732371 (1929-10-01), Luther et al.
patent: 2045321 (1936-06-01), Clarke
patent: 4302220 (1981-11-01), Volkamer et al.

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