Method of separating dimethyl ether from an olefin stream

Details Method of separating dimethyl ether from an olefin stream Method of separating dimethyl ether from an olefin stream

2005-01-18

2005-01-18

Griffin, Walter D. (Department: 1764)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

C585S836000, C585S639000, C585S864000, C585S868000, C203S095000, C203S096000, C526S077000, C208S311000, C208S313000, C208S321000, C208S347000

Reexamination Certificate

active

06844480

ABSTRACT:
This invention is directed to a method of removing dimethyl ether from an olefin stream. Dimethyl ether is removed from the olefin stream by first separating the olefin stream into a first stream comprising dimethyl ether and lighter boiling point compounds, and a second stream comprising C4+ olefin and higher boiling point hydrocarbons. The dimethyl ether is then separated from the first stream using extractive distillation.

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