2665. PIER, M., AND KROENIG, W. (I. G. Farbenindustrie A. G.). Production of Nonknocking Motor Fuels. United States Patent 2,116,081, May 3, 1938; appl. filed Jan. 29, 1936. Chem. Abs., vol. 32, 1938, p. 5200.

Nonknocking motor fuels are made by converting CO and H2 in presence of a Co-Mn catalyst on kieselguhr into hydrocarbons boiling at least in part in the gasoline range, separating these hydrocarbons into higher and lower boiling constituents by compression, and polymerizing the lower boiling constituents in presence of a condensing agent, such as bleaching earth impregnated with H3PO4.