Separation of alkenes from alkanes
US5085740A · kind A · utility
11Cited by
20References
25Claims
0Family size
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Key dates
| Filing date | Oct 26, 1990 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Oct 26, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D3/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An extractive distillation process for separating at least one C.sub.4 -C.sub.10 alkene (monoolefin) from at least one close-boiling alkane (paraffin) employs as solvent a mixture of (a) at least one N-alkyl-2-pyrrolidone, preferably N-methyl-2-pyrrolidone and either (b1) at least one sulfolane compound (preferably cyclotetramethylene sulfone) or (b2) at least one glycol compound (preferably tetraethylene glycol) or both (b1) and (b2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.