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Literature Abstracts

1409.    HERINGTON, E. F. G., AND WOODWARD, L. A.  Experiments in the Fischer-Tropsch Synthesis of Hydrocarbons From Carbon Monoxide and Hydrogen.  Trans. Faraday Soc., vol. 35, 1939, pp. 958-966; Brennstoff-Chem., vol. 20, 1939, pp. 319-324; Chem. Abs., vol. 33, 1939, p. 9583.

       Catalyst of the following composition by weight was used throughout:  Co:ThO₂:kieselguhr=100:18:100.  Oil synthesis can be insured by breaking in the catalyst in a suitable manner, that is, by keeping the temperature well below 150° when the synthesis gas is first admitted (following the treatment with H₂), the temperature should then be raised very slowly.  Under otherwise similar conditions of reaction, a high H₂:CO ratio in the ingoing gas favors the formation of hydrocarbons of lower molecular weight.  Most of the revivifying effect of the H₂O on a used catalyst is shown to be due to chemical interaction.  The addition of S compounds during the reaction at first causes an increased production of hydrocarbons of higher molecular weight.  Treatment with H₂ at 375° destroys the preferential S resistance of centers, so that, with a partly poisoned catalyst, an increase in poisoning may result owing to redistribution of the S.

       HERRMANN, K.  See abs. 1356.