Separation of methanol, ethanol and/or dimethyl ether from hydrocarbon mixtures
AssigneeExxonMobil Chemical Patents Inc.
InventorsSebastian C. Reyes, Venkatesan V. Krishnan, Gregory J. DeMartin, John Henry Sinfelt, Karl G. Strohmaier, Jose Guadalupe Santiesteban
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Abstract
The present invention is a separation process for producing a methanol, ethanol and/or dimethyl ether stream from a first stream containing C3+ hydrocarbons. The first stream comprises C3+ hydrocarbons, methanol, ethanol and/or dimethyl ether. The process comprises the step of passing the first stream through an adsorbent bed having a crystalline microporous material that preferentially adsorbs methanol, ethanol and/or dimethyl ether over the C3+ hydrocarbons.
Claims13
A process for making a propylene stream and a propane stream from an oxygenate feed stream comprising the steps of:
- (a) contacting an oxygenate feed stream with a molecular sieve catalyst under conditions sufficient to make a first stream, the first stream comprises, propylene, propane and dimethyl ether;
- (b) separating at least a majority of propane in the first stream from propylene in the first stream to farm a propylene product stream;
- and
- (c) adsorbing dimethyl ether from propane with a crystalline microporous material that preferentially adsorbs dimethyl ether over propane to form a propane stream.
Dependencies are inferred from the claim text.