Method and installation for recovering the heaviest hydrocarbons from a gaseous mixture
US4666483A · kind A · utility
9Cited by
8References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Aug 14, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The gas to be treated is cooled and partly condensed in two steps (3-4, 5-6), and the condensed fractions are distilled in a column (9). A part of the condensed liquid at the top of the column is subcooled in the second exchanger 5, expanded, and vaporized in counter-current to the gas to be treated. This permits the obtainment of cooling temperatures on the order of -80.degree. C. by means of a refrigerating unit (13, 20) operating at a temperature on the order of -30.degree. to -40.degree. C. Application to the recovery of a mixture of propane, butane and pentane from a petroleum refinery residual gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.