696. ------. [FISCHER, F., AND TROPSCH, H.] Gas Purification. Canadian Patent 266,382, Dec. 7, 1926. Chem. Abs., vol. 21, 1927, p. 1003.

S-containing C compounds are catalytically hydrogenated, and the H₂S thus formed is adsorbed.

See also British Patent 254,288 (abs. 707).