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      1088.  HOPFF, H. (I. G. Farbenindustrie A. G.).  [Oxygenated Organic Compounds.]  German Patent 512,718, Nov. 6, 1927.  Chem. Abs., vol. 25. 1931, p.1258.

            Aliphatic hydrocarbons are subjected to the action of CO in the presence of anhydrous AlCl₃ at temperature <100º under pressure.  Gives several examples.  In one, normal C₅H1₂, CO and AlCl₃ are heated to 60º in a high-pressure bomb at 120-150 atm.  The product includes a carboxylic acid C₆H₁₂O₂, b. 190º-191º, and a ketone C₆H₁₂O, b. 114º-116º.

            See also German Patent 492,427 (abs. 3925) and   United States Patent 1,798,288 (abs. 3927).