Method for the production of dimethyl ether

Details Method for the production of dimethyl ether Method for the production of dimethyl ether

2004-01-29

2008-10-14

Eyler, Yvonne (Department: 1621)

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

C518S713000, C518S714000, C518S726000, C502S307000, C502S325000, C502S342000

Reexamination Certificate

active

07435759

ABSTRACT:
A method for producing DME, which comprises separating a CO2rich stream from a crude product stream containing DME and CO2obtained by a DME synthesis from a feed syn gas; introducing the CO2rich stream to a reverse water gas shift (RWGS) reactor wherein it is reacted with hydrogen in the presence of an oxide catalyst of either ZnO or NiO to provide a CO rich stream, and recycling the CO rich stream to the step of the methanol synthesis step.

REFERENCES:
patent: 4098809 (1978-07-01), Pagani
patent: 2003/0113244 (2003-06-01), Dupont et al.
patent: 2003/0162846 (2003-08-01), Wang et al.
O.V.Krylov, A.Kh.Mamedov, S.R.Mirzabekova; Interaction of carbon dioxide with methane on oxide catalysts; Catalysis Today, 1998, 42, 211-215.

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