Butadiene recovery
US4166771A · kind A · utility
5Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1977 |
| Grant date | Sep 4, 1979 |
| Priority date | — |
| Expiry date | Mar 23, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A mixture of C.sub.4 -hydrocarbons is extractively distilled with sulfolane and acetone or methylethyl ketone as the selective solvent; the rich solvent containing 1,3-butadiene and vinylacetylene is stripped and a small quantity of the ketone is allowed to leave overhead. Thereby the further fractionation of the stripper overhead results in a very efficient separation of 1,3-butadiene and vinylacetylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.