Alkali or alkaline earth metal promoted catalyst and a process f

Details Alkali or alkaline earth metal promoted catalyst and a process f Alkali or alkaline earth metal promoted catalyst and a process f

1993-02-24

1995-01-31

Mars, Howard T.

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

568885, C07C 2706, C07C 2708

Patent

active

053859499

ABSTRACT:
The present invention relates to a novel route for the synthesis of methanol, and more specifically to the production of methanol by contacting synthesis gas under relatively mild conditions in a slurry phase with a heterogeneous catalyst comprising reduced copper chromite impregnated with an alkali or alkaline earth metal. There is thus no need to add a separate alkali or alkaline earth compound. The present invention allows the synthesis of methanol to occur in the temperature range of approximately 100.degree.-160.degree. C. and the pressure range of 40-65 atm. The process produces methanol with up to 90% syngas conversion per pass and up to 95% methanol selectivity. The only major by-product is a small amount of easily separated methyl formate. Very small amounts of water, carbon dioxide and dimethyl ether are also produced. The present catalyst combination also is capable of tolerating fluctuations in the H.sub.2 /CO ratio without major deleterious effect on the reaction rate. Furthermore, carbon dioxide and water are also tolerated without substantial catalyst deactivation.

REFERENCES:
patent: 4031123 (1977-06-01), Espino et al.
patent: 4567204 (1986-01-01), Mednick et al.
patent: 4731386 (1988-03-01), Onsager
patent: 5079267 (1992-01-01), Kao et al.

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