191. ------. [BLACK, J. F.] (Standard Oil Development Co.). Synthetic Adsorbent for Separating Hydrocarbons. United States Patent 2,442,191, May 25, 1948; appl. filed June 23, 1945, Serial No. 610,329 (Cl. 252-270). Chem. Abs., vol. 42, 1948, p. 5628.

PATENTS

191. ------. [BLACK, J. F.] (Standard Oil Development Co.). Synthetic Adsorbent for Separating Hydrocarbons. United States Patent 2,442,191, May 25, 1948; appl. filed June 23, 1945, Serial No. 610,329 (Cl. 252-270). Chem. Abs., vol. 42, 1948, p. 5628.

Adsorbent for straight-chain hydrocarbons, particularly n-paraffins, consists of a mixture of hydrons oxides having the empirical formula 4CaO·Al₂O₃·4SiO₂ and prepared by reacting a hydrons oxide of Al, a hydrous oxide of Si, and Ca(OH)₂ in the presence of a solution of 1-10% concentration of a salt of the group II element, such as CaCl₂ or Ca acetate, for 48-216 hr. at 220º-400º. After thus heating, the material is cooled to room temperature and dehydrated. Increasing the heating time increases the adsorptive capacity of the material. 1 literature ref. And 7 United States patents cited.