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Patent Abstracts

      840.  GRASSNER, F.  (I. G. Farbenindustrie A. G.).  [Freeing Gases Containing Carbon Monoxide From Volatile Iron Compounds.]  German Patent 499,652, June 16, 1925.  Schmidt, J. Das Kohlenoxyd. Akad. Verlagsgesell., Leipzig 1950. p. 214: Chem. Abs., vol. 24, 1930. p. 4562.

            Gases containing CO (except MeOH) are freed from volatile Fe compounds, especially Fe(CO)x, by leading them over burned lime, BaO, SrO, Al2O3, MgO, magnesite, pumice stone, fragments of earthenware, diatomacetous masses or active H2SiO3 at high temperatures.

            See abs. 2428, 2429.