Process for synthesizing low boiling aliphatic hydrocarbons from

Details Process for synthesizing low boiling aliphatic hydrocarbons from Process for synthesizing low boiling aliphatic hydrocarbons from

1975-11-28

1978-03-07

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604496R, 48197R, 252466J, C07C 2706

Patent

active

040779955

ABSTRACT:
Low boiling (C.sub.1 to C.sub.4) aliphatic hydrocarbons are obtained by passing a mixture of hydrogen and carbon monoxide at a molar ratio of about 1:2 to 2:1 at a temperature between about 350.degree. and about 450.degree. C. and a pressure of about 600 p.s.i.g. to about 10,000 p.s.i.g. at a volumetric hourly space velocity of about 200 to about 6000 in contact with catalyst comprising a sulfided, interspersed mixture of cobalt oxide, aluminum oxide and zinc oxide. The catalyst, prior to sulfiding, comprises about 1 to about 15 weight percent of cobalt oxide, about 55 to about 85 weight percent of aluminum oxide and about 15 to about 30 weight percent of zinc oxide. In preparing the catalyst, the cobalt, aluminum and zinc can be separately precipitated as the corresponding hydroxides and then admixed prior to calcination, or two or more of such metals can be coprecipitated as the hydroxides at a controlled pH with ammonium hydroxide from the corresponding aqueous nitrate solutions and then admixed with each other. The admixed hydroxides of cobalt, aluminum and zinc are then dried, calcined and sulfided. The sulfur content of the catalyst by elemental analysis, comprises about 2.0 to 12.0 percent by weight of the final catalyst composition.

REFERENCES:
patent: 2665288 (1954-01-01), Odell

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