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 1544.    IMHAUSEN, K. H.  [Synthesis of Edible Fats.]  Ztschr. Ver. Deut. Ing., vol. 91, 1949, pp. 463-467; Chem. Abs., vol. 44, 1950, pp. 4695, 5615.

        Fischer-Tropsch process yields 10-15% of paraffinic residue boiling 320°-450° (chain length, C₂₀-C₃₀) suitable for producing synthetic fatty acids.  The conversion uses finely distributed air of atmospheric pressure at temperatures slightly above 100° in the presence of Mn catalyzers.  The process takes 15-30 hr. in Al or special steel towers 11 m. high and 2.6 m. in diameter.  Oxidation requires approximately 50 m.³ per hr. per ton of paraffin.  The reaction is exothermic.  The product is washed in towers and saponified with 30% Na₂CO₃ and 45% NaOH at 95°.  Nonsaponifiables are separated, and the soap is heated 320°-350° to remove H₂O and paraffins, which are recycled along with the previously recovered nonsaponified material.  The soap is dissolved and converted into fatty acid and Na₂SO₄ by means of 75% H₂SO₄.  The crude fatty acid is fractionated under 4-10 mm. absolute pressure at 320° into C₅-C₉, C₁₀-C₁₇, C₁₈ and higher, and residue.  Yield is 70-80%.

        IMHOFF, D. H.  See abs. 202.

        INABA, T.  See abs. 1120.