GB252152A - - Google Patents

Abstract

252,152. Fischer, F., and Tropsch, H. May 15, 1925, [Convention date]. Carbon.-In the production of carbon by the decomposition of carbon monoxide in the presence of iron or iron oxide as a catalyst, the latter and also the gas containing carbon monoxide are freed from sulphur before use. In an example commercial carbon monoxide produced by passing carbon dioxide over flowing coke is freed from hydrogen sulphide, carbon bisulphide, and carbon oxysulphide &c. and passed over finely divided iron oxide free from sulphur. When the carbon collected contains only 5 per cent of iron the gases are passed over fresh catalyst. The process may be conducted continuously by feeding the catalyst into one end of the apparatus either in countercurrent to, or in the same. direction as, the carbon monoxide and removing the carbon contaminated with iron from the opposite end. Water gas may be used as the source of carbon monoxide. The Specification, as open to inspection under Sect. 91 (3) (a) comprises also the use of nickel and cobalt and oxides thereof as catalysts. This subject-matter does not appear in the Specification as accepted.