1879. ---------------. [TSUNEOKA, S., AND FUNASAKA, W.] Benzine Synthesis From Carbon Monoxide and Hydrogen at Ordinary Pressure. XLIII. Purification of the Gaseous Raw Material Used for Benzine Synthesis. 2. Removal of Organic Sulfur Compounds at High Temperature. Jour. Soc. Chem. Ind. (Japan), vol. 41, suppl., 1938, pp. 47-51; Sci. Papers Inst. Phys. Chem. Research (Tokyo), vol. 34, 1938, pp. 310-320; Chem. Abs., vol. 32, 1938, p. 3577.

Return to Abstracts of Literature 1750-1999

Literature Abstracts

Same city gas was used for S removal at high temperature by passing the gas through heated pipes without and in the presence of catalysts. Fe, Cu and V2A-stel pipes were used. At 500°, Fe pipe gave the best results but desulfuration is only 77%. Ag catalysts (1% Ag by wt.), CuO-CrO₄Pb, Ni, Fe-Cu, Ag catalysts (10% metal) and active C were used in an effort to eliminate the organic S by transforming it into H₂S, by contact. With CuO-CrO₄ Pb, Ni, Fe-Cu catalysts (10% metal), at temperatures 450°, 350°, 300°, 330 cm.³ per hr. per cm.³ contact (see abs. 1026) in each case, the organic S content was reduced to less than 0.2 gm. S per 100 m.³ of gas. The amount of organic S changed into H₂S was very small, the major part of it being fixed on the catalyst. A preliminary extraction of H₂S from the gas is necessary, otherwise the amounts of total S, remaining in gas, are 0.66, 3.12, 0.82 gm. per 100 m.³ respectively. With Fe₂O₂ on a pumice support (30% Fe₂O₃) and Luxmasse, at 350° and 330 m.³ per hr. per cm.³ contact, the organic S was completely removed from the gas. No preliminary extraction of H₂S is necessary and the S is economically removed to less than 0.2 gm. S per 100 m.³ (organic S less than 0.07 gm. per 100 m.³, total S less than 0.07 gm. per 100 m.³ or 99.7% S removed). The Luxmasse used by the authors was a by-product obtained in the manufacture of Al (“red mud”), often used in city-gas plants for H₂ removal, which in muddy form contained 38.2% of H₂O. The material was dried for 12 hr. at 105° and then crushed to 3-5 mm. granules.