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    • 3. 发明授权
    • PSA process with reaction for reversible reactions
    • PSA方法与可逆反应有反应
    • US5811630A
    • 1998-09-22
    • US638705
    • 1996-04-29
    • Hemant W. DandekarGregory A. Funk
    • Hemant W. DandekarGregory A. Funk
    • C07C5/27C07C7/13C07C29/151C07C29/152C07C5/22B01D53/047C07C7/12C07C9/14
    • C07C5/2772C07C5/2789C07C5/2791C07C7/13C12C11/02C07C2521/04C07C2521/06C07C2523/42C07C2527/126C07C2529/22
    • A process is disclosed for the production of a high octane product from a feed mixture comprising C.sub.5 -C.sub.6 normal paraffins in which an equilibrium reaction to produce mono and dimethyl branched paraffins is achieved by conducting the reaction and the product separation in a pressure swing adsorption and reaction zone containing a uniformly distributed adsorbent for the selective adsorption of normal paraffins and a catalyst for the equilibrium conversion of normal paraffins to mono and dimethyl branched paraffins. More specifically, the process achieves the isomerization of the normal paraffins by the reaction of the normal paraffins in the presence of hydrogen with the simultaneous removal of the mono and dimethyl branched paraffin product at the same temperature and pressure. In one embodiment, the passing of the feed mixture to the bed is terminated and the bed is purged with one of the reactants which in turn further reacts to displace heavier paraffin and enhance the overall product octane. The advantage of the present invention over the conventional process is the higher octane of the product produced and that this higher octane can be achieved at lower severity since the product is removed from the reaction zone as soon as it is produced. The lower operating severity provides longer catalyst life, and reduces the amount of heavy paraffins lost to side reactions such as cracking.
    • 公开了一种从包含C5-C6正构链烷烃的进料混合物生产高辛烷值产物的方法,其中通过在变压吸附中进行反应和产物分离来实现产生单和二甲基支链烷烃的平衡反应, 反应区含有均匀分布的吸附剂,用于选择性吸附正构烷烃和用于将正链烷烃平衡转化为单和二甲基支链烷烃的催化剂。 更具体地,该方法通过正链烷烃在氢气存在下的反应,同时在相同的温度和压力下同时除去单支和二甲基支链的石蜡产物,来实现正链烷烃的异构化。 在一个实施方案中,将进料混合物通入床中止,并且用一种反应物吹扫床,反应物又进一步反应以置换较重的石蜡并增强总产物辛烷值。 本发明优于常规方法的优点是所生产的产物中较高的辛烷值,并且可以在较低的苛刻度下实现更高的辛烷值,因为一旦生产产物就从反应区域中除去。 较低的操作苛刻度提供更长的催化剂寿命,并且减少了副反应(例如开裂)所损失的重链烷烃的量。