| 摘要 |
<p>1,184,166. Sweetening hydrocarbon distillates. UNIVERSAL OIL PRODUCTS CO. 17 April, 1968 [20 April, 1967], No. 18073/68. Heading C5E, Mercapto sulphur compounds contained in a hydrocarbon distillate are oxidized in the presence of an alkaline reagent, a phthalocyanine catalyst and oxygen in an amount of less than 1'4 times that stoichiometrically necessary to oxidize all the mercapto compounds to the corresponding disulphides. The distillates treated are kerosenes, stove oils, furnace oils, solvent oils, diesel fuels, lubricating oils, jet fuels, straight-run gasolines, cracked gasolines and heavy naphthas. Naphthenic acids and hydrogen sulphide can be washed from the feed with dilute caustic solution. The catalyst comprises either 0À005-10 wt. per cent of a phthalocyanine of Co, Va, Fe, Cu, Ni or Cr on a carrier of activated charcoal, coke, silica, alumina or magnesia or an aqueous solution of the sulphonated or carboxylated derivatives of these metal phthalocyanines. The alkaline reagent generally comprises an aqueous solution of 1- 50 wt. per cent of caustic soda, caustic potash, lithium hydroxide, rubidium hydroxide or cesium hydroxide but alcoholicalkalicanbeused.Sodium isobutyrate, ammonium hydroxide or dimethylsulphoxidemay be included in the alkaline reagent as a solutizer. The oxygen content can be controlled by removing excess dissolved or entrained oxygen from the distillate feed with nitrogen or by adding oxygen as air or dissolved in the hydrocarbon feed or alkaline reagent. The reaction is carried out at up to 204‹ C. and 0 68 to 10.2 atm. gauge.</p> |
