| 摘要 |
1,155,637. Hydrofining. CHEVRON RESEARCH CO. 5 Sept., 1967 [6 Sept., 1966], No. 40492/67. Heading C5E. A method of operating a hydrofining process comprises continuously reducing to below 50 ppm. the organic nitrogen content of a hydrocarbon feed containing from 50-20,000 ppm. of nitrogen in the form of organic nitrogen compounds by continuously contacting the feed and added hydrogen under conventional hydrofining conditions with a hydrofining catalyst comprising Mo sulphide or W sulphide and containing 1-20% combined sulphur, discontinuing the contacting when the denitrification activity of the catalyst falls to a level indicating that regeneration of the catalyst is desirable, regenerating the catalyst in the presence of an oxygen-containing gas under conventional regeneration conditions to produce a metal sulphate-containing regenerated catalyst, reducing the regenerated catalyst in a gas stream containing from 0À1-10 mol per cent of hydrogen, at a temperature of 550-750‹ F., pressure of 15-10,000 p.s.i.g. until reduction reactions are substantially completed, resulphiding the resulting regenerated and reduced catalyst, and resuming the contacting of the feed and added hydrogen with the sulphided catalyst under the conventional hydrofining conditions, e.g. temperature of 500-850‹ F., pressure of 200-4000 p.s.i.g., space velocity of 0À2-10 L.H.S.V. and a hydrogen throughput of 1000-10,000 S.C.F. per barrel of hydrocarbon feed. |
