Catalytic formation of hydrocarbons from CO, H.sub.2 mixtures an

Details Catalytic formation of hydrocarbons from CO, H.sub.2 mixtures an Catalytic formation of hydrocarbons from CO, H.sub.2 mixtures an

1977-02-17

1978-06-06

Mars, Howard T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260449R, 252455Z, 252460, 252466R, C07C 104

Patent

active

040936430

ABSTRACT:
A method for producing low molecular weight organic compounds, said method comprising the step of passing a mixture of CO and H.sub.2 over palladium supported on a suitable acidic metal oxide at a temperature and pressure sufficient to form said organic compounds. The palladium is highly dispersed on the chosen support and has a crystallite size of less than 100 A, preferably less than 70 A, most preferably, less than 40 A. In this state, the surface Pd atoms have a much higher activity than surface Pd atoms of very large Pd crystallites. To insure maintenance of such high activity and small crystallite size for a substantial period during the course of the reaction, the synthesis reactions are run at reactor bed temperatures below which agglomeration of crystallites is avoided, i.e., at temperatures below 350.degree. C., preferably about 325.degree. C., most preferably 300.degree. C.

REFERENCES:
patent: 3625664 (1971-12-01), Padovani
patent: 3854895 (1974-12-01), Muller
Shultz et al., Bur. of Mines, Report of Investigations, No. 6974 pp. 1-11, 1967.
Collier, Catalysis in Practice, Reinhold Publishing, New York, 1957, pp. 14-15.
Vannice I, J. of Catalysis 37, 449-461 (1975).
Aben, J. of Catalysis 10, 224, 229 (1968).
Vannice II, J. of Catalysis 40, 192-134, 1975.

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