1790. ------. [KALBACH, J. C.] (Hydrocarbon Research, Inc.). Conversion of Carbonaceous Materials. Canadian Patent 487,256, Oct. 14, 1952; appl. filed July 21, 1948, Serial No. 577,438; 5 claims.

Coal in a fluidized state is simultaneously hydrogenated and carbonized in the presence of H₂ substantially free from CO at pressure 300-750 p. s. i. g. and 1,000º-1,500º F. The carbonaceous residue is reacted with O₂-containing gas and steam to produce a mixture of CO and H₂. H₂ is separated from the mixture and used to hydrogenate more coal. The CO separated from the mixture of H₂ and CO is mixed with the gaseous product of carbonization to produce a high caloric gas useful as fuel.