Recovery of C4 olefins from a product stream comprising C4...

Details Recovery of C4 olefins from a product stream comprising C4... Recovery of C4 olefins from a product stream comprising C4...

2006-06-13

2006-06-13

Griffin, Walter D. (Department: 1764)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

C203S014000, C203S049000, C203S094000, C203S098000, C208S100000, C208S101000, C208S185000, C208S187000, C208S347000, C208S356000, C208S362000, C568S697000, C568S699000, C585S018000, C585S264000, C585S502000, C585S510000, C585S518000, C585S639000, C585S640000, C585S809000

Reexamination Certificate

active

07060865

ABSTRACT:
Disclosed is a process for removing DME from a stream containing C4 olefins. The process includes providing a first stream comprising C4 olefins, C5+ hydrocarbons, DME, and methanol. The first stream is separated into a second stream comprising the C4 olefins and the DME and a third stream comprising the C5+ hydrocarbons and the methanol. The second stream is directed to a DME absorption unit, wherein the second stream contacts water under conditions effective to separate the C4 olefins from the DME. Also disclosed is a process including contacting the first stream with water in a methanol removal unit under conditions effective to separate remove the methanol therefrom; distilling the methanol-depleted stream to remove C5+ hydrocarbon components, and contacting the stream with water in a DME removal unit under conditions effective to form an overhead stream comprising the C4 olefins and a bottoms stream comprising the DME.

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