836. ------. [GOUDET, A.] (The Texas Co.). Catalytic Synthesis of Hydrocarbons. United States Patent 2,464,501, Mar. 15, 1949; appl. filed Sept. 19, 1946, Serial No. 697,960: 13 claims (Cl. 260-449.6). Chem. Abs., vol. 43, 1949, p. 4447.

Patent Abstracts

836. ------. [GOUDET, A.] (The Texas Co.). Catalytic Synthesis of Hydrocarbons. United States Patent 2,464,501, Mar. 15, 1949; appl. filed Sept. 19, 1946, Serial No. 697,960: 13 claims (Cl. 260-449.6). Chem. Abs., vol. 43, 1949, p. 4447.

Synthesis gas leaves the generator at about 2,100º F. and is cooled to about 1,200º F. in a waste-heat boiler. From there it passes in direct heat exchange with a combination isomerization-dehydrogenation catalyst such as silica-alumina-thoria complex mixed with a second catalyst to 10% chromite on alumina. The synthesis gas passes upward through the catalyst, leaving the bed at about 600º F. The catalyst is discharged at the lower portion of the preheating vessel at about 1,150º F. The synthesis gas, temperature 600º F., goes from the preheater to the reactor containing a typical fluidized Fe catalyst. Cooling coils hold the temperature at 600º F., and the pressure is 200 p. s. i. Products are withdrawn. Gases are condensed, the water layer separated, and the liquid hydrocarbons and the gaseous residue preheated to 900º F. and passed in direct contact with the catalyst withdrawn from the preheater at 1,150º F. Temperature in this zone is approximately 1,000º F. with a gaseous hourly space velocity of 1,000. Gasoline of 80 octane is obtained. The gaseous fraction is recycled with partial venting to relieve the accumulation of CH₄, N₂, etc. The invention is adaptable to any type of conversions with endothermic requirements at temperatures about 700º F. and a catalyst relatively inert to the synthesis-gas stream. 2 United States patents cited.