382. ------. [CLARK, A.] (Phillips Petroleum Co.). Production of Diolefins and Motor Fuel From Carbon Monoxide and Hydrogen. United States Patent 2,506,065. May 2, 1950; appl. filed Jan. 2, 1948, Serial No. 239; 7 claims (Cl. 260-450). Chem. Abs., v

Patent Abstracts

382. ------. [CLARK, A.] (Phillips Petroleum Co.). Production of Diolefins and Motor Fuel From Carbon Monoxide and Hydrogen. United States Patent 2,506,065. May 2, 1950; appl. filed Jan. 2, 1948, Serial No. 239; 7 claims (Cl. 260-450). Chem. Abs., vol. 44, 1950, p. 6605.

Effluent from Fischer_Tropsch process is separated into a hydrocarbon phase and an aqueous phase containing H₂O-soluble, O-containing compounds. These compounds are recovered to the extent of 10-25% of the CO converted. The aqueous phase is then separated into 2 fractions at a distillation cut point of 100 C. The fraction boiling below 100º C is an azeotropic mixture containing 6-25% H₂O and is suitable charge stock without further refining for production of diolefins, particularly butadiene. Zn oxide-alumina or Mh oxide-silica as catalyst, temperature 380º-450º C, and pressures not greater than 20 lb. absolute are conditions for the butadiene production. With Ta oxide as catalyst the temperature is 300º-375º C. Yields of 27-40 lb. butadiene per 100 lb. anhydrous ethyl alcohol may be expected. C₂ and C₆ dioleins as well as some polymers and aldehyde condensation products are obtained. The last 2 materials are separated and refined along with the hydrocarbon phase from the Fischer-Tropsch synthesis. The method converts what was a waste product or material difficult to refine to a useful product. 1 foreign and 4 United States patents cited.