497.    ----------------.[CHAUX, R.]  United States Coal Gasification.  Vol. 60, 1949, pp. 924-925.

                  The production of synthetic liquid fuel occurs in 4 distinct phases:  Coal gasification; gas purification; hydrocarbon synthesis; and refining of products.  Each of these receives brief description, the first by aid of a sectional diagram of the Koppers O₂ steam gasifier.  Hydrocarbons are synthesized from synthesis gas either in a unit known as an internally cooled converter, through which cooling oil is circulated, or in a slurry type reactor, the Lamo process, in which the fluidized catalyst is kept suspended in the cooling oil by internal circulation.  All 4 phases represent a very advanced stage in instrumentation and automatic control.