Patent GB-471595-A (GB)
Title: A process for producing hydrocarbons by the catalytic reduction of oxides of carbon with hydrogen
IPC: C07C1/04
Filed: 1936-03-07
Abstract: In the catalytic conversion of carbon oxides and hydrogen into hydrocarbons, the catalysts are charged, before, during or after their preparation, with hydrocarbons in liquid, molten or p dissolved condition which are carried away after the reaction has commenced.  The high initial activity of the catalyst is thereby reduced.  Suitable additions are the reaction products themselves. The catalyst may be preserved by suspension in the hydrocarbon, excess of which is allowed to drain off after transfer to the reaction chamber.  Hydrocarbon mixtures, e.g. oil + benzine, may be used, the lower boiling component being vaporized after treating the catalyst.  In this way a smaller amount of the higher boiling component is absorbed.  Alternatively, the reduced catalyst is cooled in a stream of inert gas which it absorbs so that less hydrocarbon is absorbed.  A protective layer of molten or dissolved hydrocarbons, e.g. solid paraffin, protects the reduced catalyst, such as nickel for benzine synthesis, at ordinary temperature.  In examples: (1) equal parts of kieselguhr and cobalt carbonate with activating additions are treated with a benzine solution of solid paraffin so that, after evaporation of benzine, 5 per cent of paraffin remains in the catalyst.  This is shaped, and reduced with hydrogen at 200 DEG C., surplus paraffin draining off.  CO and H2 are introduced, the reaction beginning slowly but increasing in intensity as the gas stream carries off the paraffin.  Alternatively, the catalytic material is sieved, and treated in a rotating drum with a spray of paraffin oil which binds the particles to form grains of uniform size; (2) nickel carbonate is precipitated on kieselguhr from a solution of nickel and aluminium nitrates, the product granulated, reduced with hydrogen at 450 DEG  C., and introduced into melted paraffin, oxygen being excluded.  Surplus paraffin is removed, the granules on cooling hardening and being unaffected by air.ALSO:In the catalystic conversion of carbon oxides and hydrogen into hydrocarbons, the catalysts are charged, before, during, or after their preparation, with hydrocarbons in liquid, molten, or dissolved condition which are carried away after the reaction has commenced. The high initial activity of the catalyst is thereby reduced. Suitable additions are the reaction products themselves. The catalyst may be preserved by suspension in the hydrocarbon, excess of which is allowed to drain off after transfer to the reaction chamber. Hydrocarbon mixtures, e.g. oil and benzine, may be used, the lower boiling component being vaporized after treating the catalyst.  In this way a smaller amount of the higher boiling component is absorbed.  Alternatively the reduced catalyst is cooled in a stream of inert gas which it absorbs so that less hydrocarbon is absorbed. A protective layer of molten or dissolved hydrocarbons, e.g. solid paraffin, protects the reduced catalyst, such as nickel for benzine synthesis, at ordinary temperature.  In examples: (1) equal parts of kieselguhr and cobalt carbonate with activating additions are treated with a benzine solution of solid paraffin so that, after evaporation of benzine 5 per cent of paraffin remains in the catalyst.  This is shaped and reduced with hydrogen at 200 DEG  C., surplus paraffin draining off.  CO and H2 are introduced the reaction beginning slowly but increasing in intensity as the gas stream carries off the paraffin.  Alternatively the catalytic material is sieved, and treated in a rotating drum with a spray of paraffin oil which binds the particles to form grains of uniform size; (2) nickel carbonate is precipitated on kieselguhr from a solution of nickel and aluminium nitrates, the product granulated, reduced with hydrogen at 450 DEG C., and introduced into melted paraffin, oxygen being excluded. Surplus paraffin is removed the granules on cooling hardening and being unaffected by air.