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Patent Abstracts

      648.  FEISST, W., ROELEN, O., AND SCHUFF, W.  (Alien Property Custodian).  Synthesis of Multilink Hydrocarbons From Hydrogen and Carbon Monoxide.  United States Patent 2,369,956, Feb. 20, 1945: appl. filed Oct. 14, 1941. APC No. 414,926, in Germany Oct. 6, 1936: 9 claims (Cl. 260-449.6).  Chem. Abs., vol. 39, 1945, p. 3148.

            Co catalyst, used to exhaustion in the Fischer-Tropsch synthesis, is treated with a rapidly flowing stream of H₂ at 350º C.  In 2 hr. it removes from the catalytic mass 80%-85% of organic substances in the form of a paraffin m. p. 60º-65º.  The H₂-treated catalyst is cooled, then moistened with H₂O and dissolved in HNO₃.  The catalytically active metals are precipitated with a soda solution from the metal salt solution thus obtained, after purification by filtration.  The washed and dried catalyst is then reduced with H₂ and is again available for use.

            FELLER, A.  See abs. 3295.