Distillation of methane from a methane-containing crude gas
US4230469A · kind A · utility
12Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1978 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Jun 21, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/88
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In the separation in a rectification column of methane and optionally lower-boiling components from a methane-containing crude gas, which gas contains additionally higher-boiling hydrocarbons, hydrogen sulfide, carbon dioxide, or mixtures thereof, wherein an auxiliary cycle containing a fluid medium is employed for the production of cooling to produce reflux liquid at the head of the rectifying column, an improvement is provided wherein liquid in the rectifying column positioned above the column sump and below the column head, is vaporized in indirect heat exchange with condensing cycle medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.