Title:
SEPARATION OF OXYGENATES FROM A HYDROCARBON STREAM
Document Type and Number:
WIPO Patent Application WO2002031085
Kind Code:
A3
Abstract:
This invention relates to a method for separating olefins and paraffins from oxygenates in a liquid hydrocarbon stream containing a high proportion of olefins, paraffins and oxygenates (mainly alcohols). Typically, the hydrocarbon stream is obtained from a Fischer-Tropsch process. The organic counter-solvent has a boiling point which is less than the boiling point of the most volatile alcohol in the hydrocarbon stream. A raffinate from the liquid-liquid extractor is passed to a distillation column. A bottoms product from the distillation column comprises olefins and paraffins, and the overhead product comprising solvents is recycled. An extract from the liquid-liquid extractor is sent to a stripping column, where a bottoms product containing pure alcohol is obtained. The overhead product containing counter-solvent is recycled.
Inventors:
DE WET JOHAN PETER (ZA)
SCHOLTZ JACOB JOHANNES (ZA)
SCHOLTZ JACOB JOHANNES (ZA)
Application Number:
PCT/IB2001/001874
Publication Date:
November 07, 2002
Filing Date:
October 09, 2001
Export Citation:
Assignee:
SASOL TECH PTY LTD (ZA)
DE WET JOHAN PETER (ZA)
SCHOLTZ JACOB JOHANNES (ZA)
DE WET JOHAN PETER (ZA)
SCHOLTZ JACOB JOHANNES (ZA)
International Classes:
C10G21/04; C10G21/14; C10G53/04; (IPC1-7): C10G21/04
Domestic Patent References:
| WO1999058625A1 | 1999-11-18 |
Foreign References:
| GB717725A | 1954-11-03 | |||
| GB661916A | 1951-11-28 | |||
| US3725255A | 1973-04-03 |
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