Separation of oxygenates from a hydrocarbon stream

Details Separation of oxygenates from a hydrocarbon stream Separation of oxygenates from a hydrocarbon stream

2005-05-03

2005-05-03

Griffin, Walter D. (Department: 1764)

Mineral oils: processes and products

Refining

With reagent feed control

C585S833000, C208S263000, C208S313000, C208S322000, C208S323000, C208S333000, C208S339000

Reexamination Certificate

active

06887370

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.

REFERENCES:
patent: 3725255 (1973-04-01), Barilli et al.
patent: 661916 (1951-11-01), None
patent: 717725 (1954-11-01), None
patent: WO-9958625 (1998-11-01), None

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