Self-cooled process for extracting heavy hydrocarbon fractions
US4822948A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1987 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | May 27, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/1025
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.