2723. ------. [PRUDHOMME, E. A.] Regenerating Metal Catalysts Contaminated With Sulfur. United States Patent 1,640,668, Aug. 30, 1927. Chem. Abs., vol. 21, 1927, p. 3431.

S-contaminated catalysts, for example, those used in synthesis of light hydrocarbons, are treated with HOAc, formic acid, or other suitable organic acid to eliminate the S as H₂S.

PRYDE, D. R. See abs. 38.