Extractive distillation of hydrocarbon mixtures employing mixed solvent
US4948472A · kind A · utility
13Cited by
25References
20Claims
0Family size
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Key dates
| Filing date | Jul 12, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Jul 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A mixture of (a) at least one N-alkyl-2-pyrrolidone (preferably N-methyl-2-pyrrolidone) and (b) at least one glycol compound (preferably ethylene glycol or tetraethylene glycol) is used as solvent in the extractive distillation of a feed mixture of cycloalkane(s) (in particular cyclohexane) and close-boiling alkane(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.