Patent GB-486928-A (GB)
Title: Process for the catalytic conversion of carbon monoxide into higher hydrocarbons by means of hydrogen
IPC: C07C1/04
Filed: 1936-12-09
Abstract: In the conversion of carbon monoxide and hydrogen into higher hydrocarbons using catalysts containing iron, nickel or cobalt, with or without activators such as magnesium and thorium, the non-volatile reaction products are removed from the catalyst by treatment with solvents or with hydrogen or gases containing or yielding hydrogen, such as steam, at such frequent intervals that the efficiency of the catalyst is not impaired appreciably and without substantial rise in the reaction temperature.  The reactivation is preferably carried out in the reaction chamber. Suitable solvents are benzine, alcohols or the oils produced by the reaction.  The gases containing hydrogen are preferably freed from oxides of carbon before use as reactivating agents, and after being freed from the substances removed from the catalyst may be returned into circulation for the regeneration stage. Preferably, the catalyst is first treated with a solvent and then with gases containing hydrogen.  According to examples, (1) a mixture of 28-29 per cent carbon monoxide and 56-60 per cent hydrogen is passed over a catalyst of cobalt, thorium and kieselguhr at 185-190 DEG  C. to give higher paraffin hydrocarbons. Every 24 hrs. hydrogen at 180-185 DEG  C. is passed over the catalyst for one hour.  The non-volatile products are removed from the catalyst partly as solid paraffin or high-boiling oils and partly as methane or other gaseous hydrocarbons.  To obtain the non-volatile products unchanged, the catalyst is first treated with steam and then with hydrogen; (2) a mixture of carbon monoxide and hydrogen is passed over an alkaline iron catalyst at 225-250 DEG  C. to obtain high melting paraffins. At intervals of four days, the temperature of the catalyst is lowered to 110 DEG  C. and the non-volatile products removed by extraction with a benzine fraction boiling at 130-140 DEG  C.  Hydrogen is then passed through the catalyst and the temperature raised to the synthesis temperature.  When this is reached, the synthesis is continued until the next regeneration stage.  Specification 457,934, [Group IV], is referred to.ALSO:In the conversion of carbon monoxide and hydrogen into higher hydrocarbons using catalysts containing iron, nickel or cobalt, with or without activators such as magnesium and thorium, the non-volatile reaction products are removed from the catalyst by treatment with solvents or with hydrogen or gases containing or yielding hydrogen, such as steam, at such frequent intervals that the efficiency of the catalyst is not impaired appreciably and without substantial rise in the reaction temperature. The reactivation is preferably carried out in the reaction chamber. Suitable solvents are benzine, alcohols or the oils produced by the reaction.  The gases containing hydrogen are preferably freed from oxides of carbon before use as reactivating agents, and, after being freed from the substances removed from the catalyst, may be returned into circulation for the regeneration stage. Preferably the catalyst, is treated first with a solvent and then with gases containing hydrogen.  According to examples: (1) a mixture of 28-29 per cent carbon monoxide and 56-60 per cent hydrogen is passed over a catalyst of cobalt, thorium and kieselguhr at 185-190 DEG  C. to give higher paraffin hydrocarbons. Every 24 hours hydrogen at 180-185 DEG  C. is passed over the catalyst for one hour.  The non-volatile products are removed from the catalyst partly as solid paraffin or high boiling oils and partly as methane or other gaseous hydrocarbons.  To obtain the non-volatile products unchanged the catalyst is first treated with steam and then with hydrogen; (2) a mixture of carbon monoxide and hydrogen is passed over an alkaline iron catalyst at 225-250 DEG C. to obtain high wetting paraffins.  At intervals of 4 days the temperature of the catalyst is lowered to 110 DEG  C. and the non-volatile products removed by extraction with a benzine fraction boiling at 130-140 DEG  C.  Hydrogen is then passed through the catalyst and the temperature raised to the synthesis temperature. When this is reached, the synthesis is continued until the next regeneration stage.  Specification 457,934 is referred to.