721. ------. [FOHLEN, J. L.] [Synthetic Fuels.] French Patent 37,076, Dec. 23, 1927. Chem. Abs., vol. 25. 1931, p. 1060.

Patent Abstracts

Carbonaceous materials used for reduction of an ore and manufacture of synthetic liquid fuels are present in higher % than in a simple metallurgical operation. The yield in liquid fuels is increased by using a speed for ascending gases higher than the speed of the descending solids.

See French Patent 631,927 (abs. 720).