PATENTS

3067.----- [RUHRCHEMIE, A. G.]  [Process for Producing High-Grade Lubricants From the High-Molecular Paraffins From the catalytic Hydrogenation of Carbon Monoxide.]  German Patent Appl. --, R. 705, filed Feb. 9, 1944.  FIAT Reel K-30, frames 7,845-7,847; PB 73,587; TOM Reel 37, bag 3,451, item 36, 3 pp.

In producing high-grade lubricants from high molecular paraffins, the latter are treated at temperatures slightly > their melting point with elementary Cl until the adsorption of Cl amounts to 0.9-1.4 mol. of Cl to each mol. of hydrocarbon.  The chlorinated paraffins thus obtained are dechlorinated at 300°-400°over catalysts consisting of SiO₂ and /or Al₂O₃ which before the treatment have been heated to temperatures > the sintering temperature.  After the dechlorinated product is polymerized 50°-100° with AlCl₃, the layer of polymerisate is diluted with heavy gasoline or other solvent and separated from the catalyst residue.  it is finally treated at 100°-120° with bleaching earth, and the heavy gasoline and the fraction b. < 400° are vacuum distilled leaving an end product of viscosity 93° E, a viscosity pole height 1.58, and a solidifying point--22°.