PATENTS

3158.----- [RUHRCHEMIE, A. G.]  [Production of Pure Oxygenated Derivatives of Aliphatic Hydrocarbons, Particulary Fatty Acids or Alcohols.]  German Patent Appl. R 106,852, Pa 61,045, filed Jan 27, 1940 (Cl. IV d-12 o).  FIAT Reel B-196, frames 883-886; PB 83,253.

In producing fatty acids or alcohols by reacting CO and H₂ with olefins at raised temperature and pressure with eventual oxidation or reduction, the working-up of the olefin-containing mixtures, particularly such as have an average boiling range of 150°-350°, is performed in such a way that the heavy oil is divided into 2 or more fractions of such characteristics that in each fraction the high boiling constitutent boils at a lower degree than the lowest boiling reaction product.  The process offers particular advantage for the thorough working up of olefinic synthetic or natural hydrocarbon mixtures to pure oxygenated derivatives such as fatty acids or fatty alcohols.  For example, the heavy oil fraction of such a hydrocarbon mixture of b. p. 165°-330° is separated into 4 fractions of boiling ranges 165°-220°, 220°-255°, 255°-295°, and 295°-330°, which closely correspond to the olefins C₁₀-C₁₂, C₁₃-C₁₄, C₁₅-C₁₆, and C₁₇- C₁₉.  These fractions, which fulfill the supposition that the highest boiling constituent boils at a lower degree than the lowest boiling reaction product are subjected to the water-gas conversion, whereby the reaction product is separated through fractional vacuum distillation into nonconverted diesel oil, an aldehyde fraction. and a portion consisting of various oxygenated conversion products.  The aldehydes are then oxidized into fatty acids or reduced into alcohols of molecular weights C₁₁-C₂₀.

301275°--55—PT. II-----20