818. GOHR, E. J. (Standard Oil Development Co.). [Continuous Hydrocarbon Synthesis From Carbon Monoxide and Hydrogen by the Fluidization Process.] French Patent 943,737, Dec. 31. 1946. Mar. 16, 1949. in United States June 25, 1946. Chem. Zentralb., 19

Patent Abstracts

818. GOHR, E. J. (Standard Oil Development Co.). [Continuous Hydrocarbon Synthesis From Carbon Monoxide and Hydrogen by the Fluidization Process.] French Patent 943,737, Dec. 31. 1946. Mar. 16, 1949. in United States June 25, 1946. Chem. Zentralb., 1950, I. p. 1174.

Catalyst is maintained in the reaction zone through which the gases pass from bottom to top in the form of a lower dense phase and a superimposed dilute phase. By suitably measuring the catalyst column, care is taken that the degree of conversion of the CO always amounts to more than 95 vol %. The upper boundry line of the denser phase is allowed to rise by adding a further amount of catalyst when the process has been in operation for 500-1,000 hr. The flow velocity of the gases through the fluidized catalyst mass is so chosen that the density of the catalyst amounts to about 2.4 kg. per 1. The pressure is kept above normal pressure, and the time of contact is increased whenever the activity of the catalyst slackens.

Goldsburough, L. N. See abs. 773.