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    • 5. 发明授权
    • Naphtha upgrading process
    • 石脑油升级过程
    • US4647368A
    • 1987-03-03
    • US787565
    • 1985-10-15
    • Mary P. McGuinessKenneth M. MitchellRobert A. Ware
    • Mary P. McGuinessKenneth M. MitchellRobert A. Ware
    • C10G59/02C10G69/08
    • C10G59/02
    • An upgrading process for paraffinic naphthas subjects a full range naphtha to hydrocracking over a zeolite beta hydrocracking catalyst to effect a selective, partial hydrocracking in which the higher molecular weight n-paraffinic components of the naphtha are hydrocracked preferentially to the lower molecular weight components with concurrent isomerization of n-paraffins to isoparaffins, to form a hydrocracked effluent which comprises isobutane, C.sub.5 to C.sub.7 paraffins and relatively higher boiling naphthenes and paraffins. The hydrocracked effluent is split to remove the isobutane and the C.sub.5 and C.sub.7 paraffins with the balance of the higher boiling components being used as a reformer feed. Removal of the C.sub.5 and C.sub.7 paraffins permits improved reformer operation with the production of a higher octane product. The isomerization of the paraffins which occurs in the hydrocracking step provides a C.sub.5 to C.sub.7 paraffinic fraction which is of relatively higher octane number because of the shift to isoparaffins, permitting this component to be used as a gasoline blending component.
    • 石蜡石脑油的升级过程使全程石脑油在沸石β加氢裂化催化剂上进行加氢裂化,以实现选择性部分加氢裂化,其中石脑油的较高分子量正链烷烃组分优先加氢裂化至较低分子量组分,同时并入 正链烷烃异构化为异链烷烃,形成加氢裂化的流出物,其中包括异丁烷,C5至C7链烷烃和相对较高沸点的环烷烃和石蜡。 将加氢裂化的流出物分离以除去异丁烷,将C5和C7链烷烃与高沸点组分的余量用作重整器进料。 去除C5和C7链烷烃允许改进重整器操作,同时生产较高辛烷值的产品。 在加氢裂化步骤中发生的链烷烃的异构化提供了由于转移到异链烷烃而具有相对较高辛烷值的C5至C7链烷烃馏分,允许该组分用作汽油调和组分。