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    • 3. 发明授权
    • Integrated hydroprocessing scheme for production of premium quality
distillates and lubricants
    • 一体化加氢处理方案,用于生产优质馏出物和润滑剂
    • US4851109A
    • 1989-07-25
    • US192072
    • 1988-05-09
    • Nai Y. ChenRene B. LaPierreRandall D. PartridgeStephen S. Wong
    • Nai Y. ChenRene B. LaPierreRandall D. PartridgeStephen S. Wong
    • C10G65/12F02B3/06
    • C10G65/12C10G2300/1074C10G2400/02C10G2400/04C10G2400/08F02B3/06
    • An integrated refining scheme for hydroprocessing high boiling fractions such as gas oil and catalytically cracked cycle oils to produce premium quality distillates, especially jet fuels and naphthas suitable for reforming into high octane gasoline. In addition, unconverted, high boiling fractions suitable for processing by conventional refining techniques into high quality, low pour point lube base stocks are obtained. The integrated hydroprocessing comprises a first stage hydrocracking step employing an aromatic selective hydrocracking catalyst based on a large pore size acidic component such as amorphous alumina or silica alumina or a large pore size zeolite such as zeolite X or zeolite Y. The hydrocracking may be operated either in a naphtha directing mode under conditions of moderate to high severity or under conditions of low to moderate severity to produce a relatively higher proportion of product boiling in the middle distillate range. The unconverted fraction from the hydrocracking step is passed to a second step in which it is hydroprocessed over a zeolite beta catalyst with additional hydrogenation-dehydrogenation functionality. In this stage, the paraffins remaining in the feed are attacked by the zeolite beta to form isoparaffins and conditions may be controlled to favor hydroisomerization over hydrocracking so as to increase the yield of middle distillate product, especially of highly isoparaffinic jet fuels and diesel fuel.
    • 一种用于加氢处理高沸点馏分(如瓦斯油和催化裂解循环油)的综合精炼方案,以生产优质馏出物,特别是适用于重整为高辛烷值汽油的喷气燃料和石脑油。 此外,获得了适用于通过常规精制技术加工成高质量低倾点润滑油基础油料的未转化的高沸点馏分。 一体化加氢处理包括使用基于大孔径酸性组分如无定形氧化铝或二氧化硅氧化铝或大孔径沸石如沸石X或沸石Y的芳族选择性加氢裂化催化剂的第一阶段加氢裂化步骤。加氢裂化可以 在中等至高严重度的条件下或在低至中等严重度的条件下以石脑油引导模式在中间馏分范围内产生相对较高比例的沸点产物。 来自加氢裂化步骤的未转化的级分被传递到第二步骤,其中其在具有另外的氢化 - 脱氢官能团的沸石β催化剂上进行加氢处理。 在这个阶段,剩余在饲料中的链烷烃被沸石β攻击以形成异链烷烃,并且可以控制条件以有利于加氢裂化加氢异构化,从而提高中间馏分产物,特别是高度异链烷烃喷气燃料和柴油燃料的产率。
    • 9. 发明授权
    • Lubricant production process
    • 润滑油生产过程
    • US4919788A
    • 1990-04-24
    • US260857
    • 1988-10-21
    • Nai Y. ChenWilliam E. GarwoodTracy J. HuangQuang N. LeStephen S. Wong
    • Nai Y. ChenWilliam E. GarwoodTracy J. HuangQuang N. LeStephen S. Wong
    • C10G45/64C10G65/04C10G67/04
    • C10G67/04C10G45/64C10G65/043
    • A process for producing lubricant oils of low pour point and high viscosity index by first carrying out a partial dewaxing of a lubricant base stock in an initial catalytic dewaxing operation, followed by a selective dewaxing step. The initial catalytic dewaxing step is carried out using a large pore, high silica zeolite dewaxing catalyst such as high silica Y or zeolite beta which dewaxes by isomerizing the waxy components of the base stock to less waxy brance chain isoparaffins but the severity of the operation is controlled so as to effect only a partial removal of the waxy components. Further removal of the waxy components is effected during the subsequent dewaxing step which is selective for the removal of the more waxy n-paraffin components, leaving the branched chain isoparaffins which contribute to a high VI in the product. The selective dewaxing step may be either a solvent, e.g. MEK dewaxing operation or a catalytic dewaxing using a highly shape selective zeolite such as ZSM-22 or ZSM-23. The severity of the initial catalytic dewaxing operation may be controlled so as to effect a net increase in the content of isoparaffins and because of the selective nature of the solvent dewaxing step, this increased isoparaffins concentration may be retained, producing a product of high VI. The pour point of the feedstock is preferably reduced during the initial catalytic dewaxing step to a value which is no lower than 10.degree. F. and preferably no lower than 20.degree. F., above the target pour point for the products. Generally, this will entail a reduction of at least 10.degree. F. and preferably at least 20.degree. F. in the pour point of the feed.
    • 首先在初始催化脱蜡操作中进行润滑剂原料的部分脱蜡,然后进行选择性脱蜡步骤,生产低倾点和高粘度指数的润滑油的方法。 初始催化脱蜡步骤使用大孔,高二氧化硅沸石脱蜡催化剂如高二氧化硅Y或沸石β进行,该脱蜡通过使基础油料的蜡质组分异构化成较少的蜡状分支链异链烷烃,但操作的严重性是 被控制以仅影响蜡组分的部分去除。 在随后的脱蜡步骤中进一步除去蜡状组分,该脱蜡步骤选择性地除去更多的蜡状正链烷烃组分,留下有助于产物中高VI的支链异链烷烃。 选择性脱蜡步骤可以是溶剂,例如 MEK脱蜡操作或使用ZSM-22或ZSM-23等高选择性沸石的催化脱蜡。 可以控制初始催化脱蜡操作的严重性,以便实现异链烷烃含量的净增加,并且由于溶剂脱蜡步骤的选择性,可以保留这种增加的异链烷烃浓度,从而产生高VI的产物。 原料的倾点优选在初始催化脱蜡步骤期间降低至不低于产物的目标倾点的10°F,优选不低于20°F的值。 通常,这将导致在进料的倾点下降至少10°F,优选至少降低20°F。