EXTENDING DEWAXING CYCLE LENGTH

• Main Authors: HARANDI MOHSEN N, PERETTI KATHRYN L
• Format: Patent
• Language: Chinese; English
• Published: 30.07.2019
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

Methods are provided for dewaxing a distillate fuel boiling range feed to improve one or more cold flow properties of the distillate fuel feed, such as cloud point. The dewaxing can be performed in the presence of an olefin co-feed that allows for an increase in the average temperature for exposure of the feed to the dewaxing catalyst. If the dewaxing catalyst is included in a reactor that also includes other hydroprocessing catalyst(s), the olefin co-feed can optionally be introduced into the reactor at a location after the hydroprocessing catalyst bed(s) and prior to the dewaxing catalyst bed(s). Due to the relative ease of performing olefin saturation in the presence of a catalyst with a hydrogenation metal, a substantial portion of the olefins in an olefin co-feed (such as substantially all) can be converted to alkanes. Olefin saturation is exothermic, so the conversion of olefins to alkanes can provide a temperature increase for a feed as it is being exposed to catalyst in a catalyst bed. 提供用于将馏出燃料沸程进料脱蜡