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Patent Abstracts

      1053.  HIDAKA, T., AND OTHERS  (Nissan Chemical Industries Co.).  [Recovery of Hydrogen Sulfide in the Gaseous Mixture as Free Sulfur.]  Japanese Patent 4,338, Oct. 22, 1952.  Chem. Abs., vol. 47, 1953, p. 8997.

            Water gas containing a small amount of H₂S is passed through an absorption tower containing yellow earth (Fe₂O₃∙3H₂O) molded into granules with 2% NaOH; when the weight of absorbent increases 30-33% of the weight, inert gas containing a small amount of O₂ is passed through to heat at about 50° by the heat of reaction, and to separate the free S, and the S is extracted with liquid NH₃ to recover 96-98% of the S in the absorbent.  The regenerated absorbent is then recycled. 

            HILBERATH, F.  See abs. 2629, 2630, 2631.

            HILL, A. J., Jr.  See abs. 871.

            HILL,   B. L.  See abs. 657.