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    • 6. 发明授权
    • Gasoline upgrading process
    • 汽油升级过程
    • US5360532A
    • 1994-11-01
    • US42189
    • 1993-04-02
    • David L. FletcherStephen J. McGovernJohn E. Sauer
    • David L. FletcherStephen J. McGovernJohn E. Sauer
    • C10G67/04C10G69/08C10G45/00
    • C10G69/08C10G67/04
    • Low sulfur gasoline is produced from a catalytically cracked, sulfur-containing naphtha by fractionating the naphtha feed into a low boiling fraction in which the majority of the sulfur is present in the form of mercaptans and a high-boiling fraction in which the sulfur is predominantly in non-mercaptan form such as thiophenes. The low boiling fraction is desulfurized by a non-hydrogenative mercaptan extraction process which retains the olefins which are present in this fraction. The second fraction is desulfurized by hydrodesulfurization, which results in some saturation of olefins and loss of octane. The octane loss is restored by treatment over an acidic catalyst, preferably an intermediate pore size zeolite such as ZSM-5, to form a low sulfur gasoline product with an octane number comparable to that of the feed naphtha but which contains some recombined sulfur in the form or mercaptans which are removed in the non-hydrogenative mercaptan extraction step.
    • 通过将石脑油进料分馏成低沸点馏分,其中大部分硫以硫醇和高沸点馏分的形式存在,低硫汽油由催化裂解的含硫石脑油生产,其中硫主要是 在非硫醇形式如噻吩中。 低沸点馏分通过保留存在于该馏分中的烯烃的非氢化硫醇萃取方法进行脱硫。 第二部分通过加氢脱硫脱硫,导致烯烃的一些饱和和辛烷值的损失。 通过在酸性催化剂,优选中等孔径的沸石如ZSM-5上处理来恢复辛烷值损失,以形成辛烷值与供应石脑油相当的低硫汽油产物,但其中含有一些重组硫 在非氢化硫醇提取步骤中除去的形式或硫醇。