Liquid phase process for dimethyl ether synthesis

Details Liquid phase process for dimethyl ether synthesis Liquid phase process for dimethyl ether synthesis

1992-04-23

1993-06-08

Mars, Howard T.

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

C07C 4101

Patent

active

052180034

ABSTRACT:
A one-step process is disclosed for the coproduction of dimethyl ether and methanol from synthesis gas containing H.sub.2, CO, and CO.sub.2. The synthesis gas is contacted with a mixture of methanol synthesis and methanol dehydration catalysts suspended in an inert liquid in a three phase reactor system. Maximum dimethyl ether productivity and product energy recovery are realized by controlling the fraction of methanol synthesis catalyst in the range of about 75 to about 90 wt % of the total catalyst mixture. A methanol-rich fuel product containing dimethyl ether can be obtained when this range is about 95 to about 99.9 wt %.

REFERENCES:
Lewnard et al, Chemical Engineering Science, vol. 45, No. 8, pp. 2735-2741, 1990.
Hsiung et al, AIChE National Meeting, San Diego, Calif., Aug. 14-22, 1990, "Synthesis of Dimethyl Ether from Syngas in a Slurry Reactor".
Sherwin et al, Liquid Phase Methanol, AF-693 Research Project 317-2 May 1978.

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