PATENTS

      3.  ADAMS, C. E., and Dinerstein, R. A. (Standard Oil Co. of Indiana).  Urea Fractionation of Organic Compounds.  United States Patent 2,588,602, Mar. 11, 1952.  Chem. Abs., vol. 47,1953, p. 1181

Straight-chain organic compounds (hydrocarbons, alcohols, or aldehydes) of the highest molecular weight are separated from a mixture of straight-chain compounds of the same class by treating a solution of the mixture with urea (I) and a urea activator (H₂O, MeOH, EtOH, PrOH, or Me₂CO) to form a complex with the compound (II) of highest molecular weight and separating the complex from the reaction mixture.  The molar ratio of (I) : (II) is around (n-2), where n is the number of C atoms in (II).

AGNEW, G. H.  See abs. 2209