655. ------. [FETTERLY, L. C.] (N. V. de Bataafsche Petroleum Maatschappij). [Separation of Branched Aliphatic and Aromatic as Well as Cyclic and Naphthenic Hydrocarbons From Mixtures With Other Hydrocarbons and Hydrocarbon Compounds by Adding Urea or

Patent Abstracts

655. ------. [FETTERLY, L. C.] (N. V. de Bataafsche Petroleum Maatschappij). [Separation of Branched Aliphatic and Aromatic as Well as Cyclic and Naphthenic Hydrocarbons From Mixtures With Other Hydrocarbons and Hydrocarbon Compounds by Adding Urea or Thiourea Which Forms Crystalline Complex Compounds With Isoparaffins, Cyclic or Naphthenic Hydrocarbons.] French Patent 964,693, Aug. 15, 1948. Chem. Zentralb., 1951, I, p. 1104.