PATENTS

      202. BOOTH, N., AND JOLLEY, L. J.  Purification of Gases.  British Patent 572,471, July 9, 1941.  British Abs., 1946, I. B. p. 54.

Catalyst suitable for reducing the organic S compounds to H₂S is prepared by depositing Fe, by thermal decomposition at 400°-450° of Fe(CO)₃, on porcelain rings, porous pot, glass beads, Cu gauze, or other support.  The operating temperature is not less than 450°.  The degree of purification depends on the space velocity V (vol. Per vol. Per hr.).  At V=400° and 500°, the organic S in coal gas previously freed from H₂S is reduced to <1 grain per 100 cu ft.  By combining the process with a prior oil scrubbing to remove the more resistant S compounds, the residual organic S is brought to <0.1 grain per 100 cu. Ft.