384. ------. [CLARK, A.] (Phillips Petroleum Co.). Removal of Exothermic Heat of Reaction. United States Patent 2,526,934. Oct. 24, 1950; appl. Filed Jan. 20, 1947. Serial No. 723,195; 3 claims (Cl. 260-449.6). Chem. Abs., vol. 45, 1951, p. 1752.

Patent Abstracts

384. 384. ------. [CLARK, A.] (Phillips Petroleum Co.). Removal of Exothermic Heat of Reaction. United States Patent 2,526,934. Oct. 24, 1950; appl. Filed Jan. 20, 1947. Serial No. 723,195; 3 claims (Cl. 260-449.6). Chem. Abs., vol. 45, 1951, p. 1752.

Boiling point of coolant is coordinated with reaction temperature and pressure so that the coolant is introduced at its boiling point under such conditions that a substantial part is the liquid phase. Maximum cooling effect is realized by adsorption as latent heat of vaporization of the liquid, preferably H₂ and CO are introduced countercurrent with the coolant. At no point should the coolant establish a level. When it is necessary, as in Fischer-Tropsch reaction to increase reaction temperature to maintain conversion level, the reaction pressure is correspondingly increased to keep the coolant under boiling conditions. Fischer-Tropsche products, 295°-305° F. fraction, may be used at 30-40 p. s. i. and 392° F. with Co-Th catalyst. With hydrocarbon coolent, ratio of coolant to product will be 40-100. with H₂O a ratio as low as 15 may be used. Reaction temperatures for Co-Th catalyst will be 180°-220° C., for Ni-Th, 170°-200° and for Fe. 220°-280° C. Space velocities for Co-Th and Ni-Th will be 100 vol. Synthesis gas per vol. Catalyst per hr.: for Fe it may be as high as 150 or 300. Pressure may be atmospheric—500 p. s. i. Synthesis gas composition for Co and Ni catalysts may be H₂:CO=2:1; for Fe, H₂:CO=1-2:1. 2 foreign and 4 United States patents cited.