2636. PHILLIPS, I. H., AND HUMPHREYS & GLASGOW, LTD. Removing Hydrogen Sulfide From a Gas Mixture With a Purification Material and Then Revivifying That Material. British Patent 681,551, Oct. 29, 1952. Chem. Abs., vol. 47, 1953, p. 5667.

H2S as in coke-oven gas is removed with a material containing Fe(OH)3. This material is revivified by passing air or other O2-containing gas through the material.