Self-cooled process for extracting heavy hydrocarbon fractions

Details Self-cooled process for extracting heavy hydrocarbon fractions Self-cooled process for extracting heavy hydrocarbon fractions

1987-05-27

1989-04-18

Sneed, H. M. S.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

585864, 585866, 585867, 585833, C07C 548, C07C 710, C07C 700

Patent

active

048229482

ABSTRACT:
This new process provides for the treatment of a gas containing a light fraction and a heavy fraction, so as to extract at least a portion of the heavy fraction.
The process is characterized in that the gas to be treated (1) is contacted with a solvent (8) under cooling conditions to selectively absorb at least a portion of the heavy fraction of the gas in the solvent; the light unabsorbed fraction is discharged (16) and the solution of the heavy fraction in the solvent (18) is subjected to desorption (B.sub.1): the solvent (6) is recycled and the evaporated heavy fraction (9) is condensed (C), expanded (V.sub.1) and evaporated in thermal exchange contact (E.sub.2) with the mixture of the gas and the solvent to be cooled; the heavy fraction is discharged (14).
The process may be used for the treatment of gas on the field (associated gas, natural gas) and/or in refining and petrochemical operations.

REFERENCES:
patent: 2762453 (1956-09-01), Alexander
patent: 2794516 (1957-06-01), Baggett
patent: 3098107 (1963-07-01), Becker
patent: 3943185 (1976-03-01), Tschopp
patent: 4334102 (1982-06-01), Decker et al.

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