Process for the production of olefins from synthesis gas

Details Process for the production of olefins from synthesis gas Process for the production of olefins from synthesis gas

1981-02-17

1983-08-09

Waltz, Thomas A.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

568909, 585639, C07C 104

Patent

active

043980503

ABSTRACT:
A process for the production of olefins from synthesis gas comprises a first synthesis stage in which a mixture of methanol and higher alcohols are formed from a synthesis gas comprising hydrogen and carbon monoxide. The catalyst for the first synthesis stage comprises the oxides of copper and zinc in intimate association with each other and a promoting compound selected from the group consisting of chromium, cerium, lanthanum, manganese, thorium, and an alkali metal. The materials from the first synthesis stage are separated into a gas phase and a liquid phase. Thereafter the methanol is separated from the higher alcohol fractions. The higher alcohols are then subjected to dehydration in a dehydration stage which comprises passing the higher alcohol fraction over an alkalized dehydration catalyst at a pressure in the range of 0.5-1 bar and a temperature in the range of 350.degree.-500.degree. C. Thereafter the olefins produced by the dehydration of the higher alcohols are separated into the olefinic and non-olefinic materials. Preferred dehydration catalysts include alkalized aluminum oxide and alkalized calcium phosphate.

REFERENCES:
patent: 2636057 (1953-04-01), Cutcher et al.
patent: 4049741 (1977-09-01), Kuo et al.
patent: 4076761 (1978-02-01), Chang et al.
patent: 4260841 (1981-04-01), Holland et al.
Natarajan et al., "Alumina Catalyst for Alcohol Dehydration," Indian J. Tech., vol. 10, Dec., 1972, pp. 463-464.

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