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PATENTS
52.
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[ATWELL, H. V.] (The Texas Co.). Method
for Synthesizing Hydrocarbons and the Like.
United
States Patent 2,433,255, Dec. 23, 1947: appl. Filed Sept. 26, 1946, Serial
No. 699,439: 9 claims (Cl.
260-449.6). Chem. Abs., vol. 42, 1948. p. 1724. Catalyst
particles are distributed in a number of beds.
A layer of noncatalytic packing material is superimposed on each catalyst
bed. The temperature is controlled
by direct contact of the catalyst in each stage with a cooling liquid.
A substantial portion of the cooling liquid is vaporizable under the
conversion conditions. Part of the nonvaporized cooling liquid is continuously
withdrawn from the lower section of each stage.
A fraction of this coolant is introduced into a separate unit for
recovery of dissolved conversion products therefrom.
Another portion is cooled and returned to the stage from which it was
withdrawn at a point above the layer of noncatalytic packing material.
The effluent from each catalyst bed is subjected to countercurrent
contact with recycled cooled liquid in the layer of noncatalytic material.
High-boiling components of the products and vaporized constituents of the
cooling liquid in the effluent are condensed and flow back to the catalyst bed.
In the example for conversion of CO and H2 to liquid
hydrocarbons, a gasoline-gas oil fraction derived from the products of
conversion is used as liquid coolant. 5
United Sates patents cited. |