PATENT

3666. ----- [STUDIEN-UND VERWERTUNGS-G. M. B. H.]  Cracking Oils.  British Patent 453,973, Sept. 22, 1936.  Chem. Abs., vol. 31, 1937, p. 1598.

Antidetonating benzines and lubricating oils are produced from the products formed in the synthesis of benzines from H₂ and oxides of C by removing the light benzines that boil up to 100°, and also the paraffin from the higher-boiling fractions, condensing the olefins in the higher-boiling fractions to form lubricating oils, removing the noncondensed fractions from the lubricating oils, removing the noncondensed fractions from he lubricating oils and cracking these fractions if desired together with the paraffins removed at an earlier stage.  Thus 100 kg. of a raw product produced by treating water gas at 200° in presence of a catalyst comprising Co and ZnO is fractionally distilled up to 125°, whereby a light benzine having a 60% olefin content is obtained, and then up to 250° to give a heavy benzine, the residue comprising 21 kg. of crude paraffin.  The heavy benzine distillate is polymerized with AlCl₃ for 2 hr. at 120° and allowed to settle for 6 hr.  The upper layer is separated from the lower layer of AlCl₃ addition compounds and is distilled to 250° at normal pressure and then to 200° under vacuum.  The residue of 10.5 kg. comprises a lubricating oil of viscosity under 1.9 and solidification point -36°.  The distillate is cracked in admixture with the paraffin residue, 39 kg. of a cracked benzine having an octane number of 75 being obtained.