2747. RAY, G. C. (Phillips Petroleum Co.). Hydrogenation of Acetylene. United States Patent Appl. 32,541, no date. Official Gaz., vol. 652, 1951, p. 891; Chem. Abs., vol. 47, 1953, p. 1725.

Effluent from hydrocarbon cracking is passed over a catalyst consisting of at least 1 of the group of a Mo, a Ni, or a W sulfide at 150°-350°, 1-50 atm. pressure, and space velocity of 300-500 vol. gas per catalyst vol. per hr., to selectively hydrogenate the 5% or less of C₂H₂ present.