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Patent Abstracts

      433.            COOPER, C., HENSHAW, D. M., AND W. C. Holmes & Co., LTD.  Purification of Gases Containing Hydrogen Sulfide.  British Patent 551,652, Mar. 4, 1943.  Chem. Abs., vol. 38, 1944. p. 3114.

Describes process for treating coal gas and other gases containing H2S with a dilute solution of NH4OH.  The times of contact of the gases with the liquid is so short that H2S is selectively absorbed.