Separation of methanol, ethanol and/or dimethyl ether from hydrocarbon mixtures (US6984765)

(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.

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U.S. References:

Go to Result Set: All U.S. references | No patents reference this one | Backward references (19) | Citation Link

Patent	Pub.Date	Inventor	Assignee	Title
US4310440	1982-01	Wilson et al.	Union Carbide Corporation	Crystalline metallophosphate compositions
US4447653	1984-05	Vora	UOP Inc.	Adsorbent regeneration in integrated etherification process
US4465870	1984-08	Herskovits	UOP Inc.	Etherification process with sorptive treating of hydrocarbon recycle stream
US4605787	1986-08	Chu et al.	Mobil Oil Corporation	Process for the preparation of alkyl tert-alkyl ethers
US4734199	1988-03	Nagji et al.	Union Carbide Corporation	Liquid phase adsorption process
US4740631	1988-04	Nagji et al.	Union Carbide Corporation	Process for preparing ethers
US4748281	1988-05	Whisenhunt et al.	Conoco Inc.	Recovery of methanol in an MTBE process
US4814517	1989-03	Trubac	UOP	Oxygenate removal in MTBE production
US4861938	1989-08	Lewis et al.	UOP	Chemical conversion process
US5026482	1991-06	Sircar	Air Products and Chemicals, Inc.	Separation of liquid mixtures by concentration swing adsorption
US5030768	1991-07	Chen et al.	Air Products and Chemicals, Inc.	Process for preparing alkyl tert-alkyl ethers
US5237111	1993-08	Yon et al.	UOP	Liquid adsorption process to produce an ultra pure product
US5527981	1996-06	Valyocsik	Mobil Oil Corporation	Sorption separation with MCM-58
US6403854	2002-06	Miller et al.	UOP LLC	Two-stage quench tower for use with oxygenate conversion process
US6488741	2002-12	Olson	The Trustess of the University of Pennsylvania	Light hydrocarbon separation using 8-member ring zeolites
US6733572	2004-05	Reyes et al.	ExxonMobil Chemical Patents Inc.	Separation of propylene and dimethylether from hydrocarbon mixtures
US20020144597A1	2002-10	Olson		LIGHT HYDROCARBON SEPARATION USING 8-MEMBER RING ZEOLITES
US20030018228A1	2003-01	Vaughn et al.		Molecular sieve catalyst composition, its making and use in conversion processes
US20040254416A1	2004-12	Risch et al.		Removal of oxygenate from an olefin stream

Foreign References:

Publication	Date	IPC Code	Assignee	Title
EP0229994	1989-05	C07C 7/00	UNION CARBIDE CORPORATION	Process for the removal of dimethyl ether contained as an impurity in liquid olefinic C3-C5 feeds
EP0572239	1996-10	C07C 7/00	THE BOC GROUP, INC.	Separation of hydrocarbon mixtures
EP0943595	2002-01	C07C 7/00	THE BOC GROUP, INC.	PROCESS FOR THE SEPARATION OF ALKENES AND ALKANES