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    • 9. 发明授权
    • Multiple stage sulfur removal process
    • 多级除硫工艺
    • US6059962A
    • 2000-05-09
    • US150451
    • 1998-09-09
    • Bruce D. AlexanderGeorge A. HuffVivek R. PradhanWilliam J. ReaganRoger H. Cayton
    • Bruce D. AlexanderGeorge A. HuffVivek R. PradhanWilliam J. ReaganRoger H. Cayton
    • C10G57/00C10G7/00C10G17/095C10G29/20C10G55/06C10G29/00
    • C10G29/205
    • A product of reduced sulfur content is produced in a multiple stage process from a feedstock which is comprised of a mixture of hydrocarbons and includes sulfur-containing aromatic compounds as unwanted impurities. The first stage involves: (1) subjecting the feedstock to alkylation conditions which are effective to convert a portion of the impurities to higher boiling sulfur-containing products, and (2) separating the resulting products by fractional distillation into a lower boiling fraction and a higher boiling fraction. The lower boiling fraction is comprised of hydrocarbons and is of reduced sulfur content relative to the feedstock. The higher boiling fraction is comprised of hydrocarbons and contains unconverted sulfur-containing aromatic impurities and also the higher boiling sulfur-containing products. Each subsequent stage involves: (1) subjecting the higher boiling fraction from the preceding stage to alkylation conditions which are effective to convert at least a portion of its content of sulfur-containing aromatic compounds to higher boiling sulfur-containing products, and (2) separating the resulting products by fractional distillation into a lower boiling hydrocarbon fraction and a higher boiling fraction which contains higher boiling sulfur-containing alkylation products. The total hydrocarbon product of reduced sulfur content from the process is comprised of the lower boiling fractions from various stages.
    • 减少硫含量的产物在多级工艺中由来自烃的混合物的原料产生,并且包括作为不需要的杂质的含硫芳族化合物。 第一阶段包括:(1)使原料经受有效将一部分杂质转化成高沸点含硫产物的烷基化条件,和(2)通过分馏将所得产物分离成较低沸点馏分和 较高的沸点。 低沸点馏分由烃组成,相对于原料硫含量降低。 较高沸点馏分由烃组成,含有未转化的含硫芳族杂质和较高沸点含硫产物。 每个后续阶段包括:(1)将来自前一阶段的较高沸点馏分经受烷基化条件,这些条件有效地将其含硫芳香族化合物的至少一部分转化成高沸点含硫产物,和(2) 通过分馏将所得产物分离成低沸点烃馏分和含较高沸点含硫烷基化产物的较高沸点馏分。 来自该方法的硫含量降低的总烃产物由来自不同阶段的低沸点馏分组成。