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      1128.  ------.  [I. G. FARBENINDUSTRIE A. G.]  Aldehydes.  British Patent 267,925, Mar. 19, 1926.  Chem. Abs., vol. 22, 1928, p. 1163.

            Carboxylic acids are treated in the presence of a heated catalyst (such as Fe, Co, Cr, or Ce catalysts) with CO or gases containing CO.  Gives examples for the production of BzH from benzoic acid vapor and of AcH from HOAc.