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271. BLUMENTHAL, L. M. Activated-Carbon Production in Germany During the War. FIAT Final Rept. 1181, 1947, 21 pp.; PB 85,143. General review of German developments in the production and uses of activated C in such fields as gas-mask C, C-depolarizer for dry cells, purification of water, deoiling of boiler condensate, industrial vapor and gas adsorption, and regenerated cellulose fiber containing active C. The production capacity of plants had increased from a total of 990 tons in 1939 to 1,377 tons per month in 1944. A list of trade names is appended. Particular attention was paid to the use of gas-adsorption carbons in the Fischer-Tropsch synthesis. A higher recovery of C3H8 was achieved by increasing the size of adsorbers and by the use of special gas-adsorption carbons, TS and SK identical with type G used in gas masks. SK, an improved supersorbon, 4 mm., 400 gm. per 1., was found to be 50-60% more effective than supersorbon T for this application. SK carbon also was found to be very effective in the adsorption of C2H4 and of CH4. Purification of gas for the Fischer-Tropsch process can be carried out as follows: H2S is removed, then a treatment with supersorbon follows at room temperature to remove gum-forming hydrocarbons, dienes, indenes, and stable cyclic S compounds. The supersorbon is regenerated by the Bayer procedure and liquid-aromatic fuel obtained in this manner. Labile S compounds such as COS are then eliminated by purifying with alkaline Fe hydroxide at 150°-300°. Continuous use of the Fischer-Tropsch catalyst for 6-7 months is insured by this treatment of the gas, which lowers the S content to less than 0.1 gm. per 100 m.3
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