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    • 1. 发明授权
    • Gasoline upgrading process
    • 汽油升级过程
    • US5320742A
    • 1994-06-14
    • US963229
    • 1992-10-19
    • David L. FletcherTimothy L. HilbertDavid A. PappalDavid W. RumseyGerald J. Teitman
    • David L. FletcherTimothy L. HilbertDavid A. PappalDavid W. RumseyGerald J. Teitman
    • C10G35/04C10G59/00C10G65/04C10G67/12C10G69/08C10G35/00C10G45/00
    • C10G69/08C10G65/043C10G67/12
    • A sulfur-containing catalytically cracked naphtha is upgraded to form a low-sulfur gasoline product by a process which retains the octane contribution from the olefinic front end of the naphtha. Initially, the mercaptan sulfur in the front end of the cracked naphtha is converted to higher boiling disulfides by oxidation. The front end, which is then essentially an olefinic, high octane sulfur-free material, may be blended directly into the gasoline pool. The back end, which now contains the original higher boiling sulfur components such as thiophenes, together with the sulfur transferred from the front end as disulfides, is hydrotreated to produce a desulfurized product. This desulfurized product, which has undergone a loss in octane by saturation of olefins, is then treated in a second stage, by contact with a catalyst of acidic functionality, preferably a zeolite such as ZSM-5, under conditions which produce a product in the gasoline boiling range of higher octane value. Because this second product may contain combined organic sulfur, it may be subjected to a final desulfurization to reduce organic sulfur to acceptable levels.
    • 通过保留来自石脑油的烯烃前端的辛烷贡献的方法,将含硫催化裂化石脑油升级以形成低硫汽油产物。 最初,裂化石脑油前端的硫醇硫通过氧化转化为较高沸点的二硫化物。 然后,基本上为烯属,高辛烷值的无硫材料的前端可以直接混合到汽油池中。 现在包含原来较高沸点的硫成分如噻吩的后端与从前端转移的硫作为二硫化物一起加氢处理以产生脱硫产物。 然后在第二阶段通过与酸性官能团的催化剂(优选沸石如ZSM-5)接触,在产生烯烃的产物的条件下处理已经经历烯烃饱和的辛烷值损失的该脱硫产物 汽油沸点范围较高的辛烷值。 因为该第二产品可能含有组合的有机硫,所以可以对其进行最终脱硫以将有机硫降低至可接受的水平。
    • 8. 发明授权
    • Gasoline upgrading process
    • 汽油升级过程
    • US5326463A
    • 1994-07-05
    • US967322
    • 1992-10-28
    • David L. FletcherTimothy L. HilbertMichael S. SarliStuart S. Shih
    • David L. FletcherTimothy L. HilbertMichael S. SarliStuart S. Shih
    • C10G35/095C10G53/16C10G67/00C10G67/16C10G69/08C10G45/00
    • C10G35/095C10G53/16C10G67/00C10G67/16C10G69/08C10G2300/70
    • Low sulfur gasoline of relatively high octane number is produced from a catalytically cracked, sulfur-containing naphtha by hydrodesulfurization and treatment over an acidic catalyst, preferably an intermediate pore size zeolite such as ZSM-5 in an octane restoration step, followed by separation of a C.sub.9 -containing fraction, and recycling the C.sub.9 -containing fraction to the octane restoration step. A hydrocarbon fraction comprising C.sub.1 to C.sub.3 hydrocarbons may also be separated from the octane restored product and recycled for purposes of alkylating aromatic hydrocarbons and for this purpose, it may be advantageous to introduce a benzene-rich feed, such as a reformate, to the process. The treatment over the acidic catalyst in the octane restoration step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha.
    • 相对高辛烷值的低硫汽油通过加氢脱硫和在酸性催化剂,优选中等孔径的沸石如ZSM-5在辛烷值恢复步骤中进行加氢脱硫和处理,由催化裂解的含硫石脑油生产,然后分离 含有C9的级分,并将含C9馏分再循环至辛烷还原步骤。 包含C 1至C 3烃的烃馏分也可与正辛烷烃还原产物分离并再循环用于烷基化芳族烃的目的,为此,将富含苯的进料如重整产物引入该方法可能是有利的 。 在辛烷维持步骤中对酸性催化剂的处理恢复了由于氢化处理而发生的辛烷值损失,并导致辛烷值与进料石脑油相当的辛烷值的低硫汽油产物。
    • 9. 发明授权
    • Gasoline upgrading process
    • 汽油升级过程
    • US5290427A
    • 1994-03-01
    • US925007
    • 1992-08-05
    • David L. FletcherTimothy L. HilbertMichael S. SarliStuart S. Shih
    • David L. FletcherTimothy L. HilbertMichael S. SarliStuart S. Shih
    • C10G69/08C10G45/00
    • C10G69/08
    • Low sulfur gasoline is produced from a catalytically cracked, sulfur-containing naphtha by fractionating the naphtha feed into a number of fractions of differing boiling range and hydrodesulfurizing them by by feeding them into a hydrodesulfurization reactor at spaced locations along the length of the reactor in order of descending boiling range, with the highest boiling fraction first. Staged introduction of the feed into the hydrodesulfurization reactor in this way promotes desulfurization of the sulfur-rich, olefin poor back end of the feed while reducing the saturation of the high octane olefins in the olefin-rich, sulfur-poor front end, so preserving octane while achieving the desired desulfurization. The hydrodesulfurization is followed by treatment over an acidic catalyst, preferably an intermediate pore size zeolite such as ZSM-5. The treatment over the acidic catalyst in the second step restores octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha.
    • 通过将石脑油进料分馏成不同沸程的多个馏分并将其加氢脱硫,通过将其按照反应器长度的间隔位置依次送入加氢脱硫反应器中,由催化裂化的含硫石脑油生产低硫汽油 沸点下降,沸点最高。 以这种方式将进料分阶段引入加氢脱硫反应器促进了进料中富含硫的烯烃不良后端的脱硫,同时降低了烯烃富含硫贫的前端中的高辛烷值烯烃的饱和度,从而保持 辛烷值,同时达到理想的脱硫效果。 加氢脱硫之后,通过酸性催化剂,优选中等孔径的沸石如ZSM-5处理。 在第二步骤中对酸性催化剂的处理恢复了由于氢化处理而发生的辛烷值损失,并导致具有与进料石脑油相当的辛烷值的低硫汽油产物。