Process for purifying a C.sub.4 and/or C.sub.5 hydrocarbon cut containing water and dimethyl ether as impurities
US4474647A · kind A · utility
29Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1982 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Apr 23, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A C.sub.4 and/or C.sub.5 olefinic hydrocarbon cut, containing dimethyl ether and water as impurities, in a relative proportion of dimethyl ether to water of at most 5:1, is purified in a distillation zone where it is introduced at an intermediate level, distant from the top or from the bottom thereof by at least 3 theoretical plates, optionally with a stripping gas, and separated into a overhead fraction comprising an aqueous liquid phase and a hydrocarbon liquid phase at least partially recycled as reflux to the upper part of the distillation zone, and a bottom fraction formed of the purified C.sub.4 and/or C.sub.5 olefinic cut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.