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    • 1. 发明授权
    • Process for alkane isomerization using reactive chromatography
    • 使用反应层析的烷烃异构化方法
    • US5763730A
    • 1998-06-09
    • US666717
    • 1996-06-18
    • Hemant W. DandekarGregory A. FunkRalph D. GillespieHerman A. ZinnenCharles P. McGonegalMasami KojimaSimon H. Hobbs
    • Hemant W. DandekarGregory A. FunkRalph D. GillespieHerman A. ZinnenCharles P. McGonegalMasami KojimaSimon H. Hobbs
    • C07C5/27C07C7/13C07C9/12C07C9/16C07C9/18C07C5/122
    • C07C5/2789C07C5/2791C07C7/13C07C9/12C07C9/16C07C9/18C07C2521/04C07C2521/06C07C2523/42C07C2523/54C07C2527/126C07C2529/22Y02P20/582
    • A process for the continuous isomerization of an alkane to produce an isomerized product through contacting the alkane with a simulated moving bed acting as a catalyst for isomerization and an adsorbent for the alkanes has been developed. The alkane may be n-butane and the isomerized product 2-methylpropane, the alkane may be n-pentane and the isomerized product 2-methylbutane or 2,2-dimethylpropane, the alkane may have from 6 up to about 8 carbon atoms with no more than one methyl branch and the isomerized product having the same number of carbon atoms and at least two methyl branches, or the reactant may be a mixture of the foregoing alkanes with the corresponding isomerized products being formed. In a zone of the simulated moving bed, the alkanes are catalytically isomerized to form the isomerized products. The unreacted alkanes are adsorbed, and the isomerized products are collected. In a subsequent zone of the simulated moving bed, the unreacted alkanes are desorbed using a desorbent and may be catalytically isomerized to form additional isomerized products which are also separated and collected. The catalyst used in the simulated moving bed may be platinum on tungstated zirconia, and the adsorbent used in the simulated moving bed may be EU-1, ZSM-12, SAPO-5, Y-82, faujasite, erionite, zeolite beta exchanged with sodium, lithium, potassium, barium, calcium, strontium or combinations thereof, zeolite X exchanged with calcium and strontium, mordenite exchanged with sodium, lithium, potassium, barium, calcium, strontium, or combinations thereof.
    • 已经开发了通过使烷烃与用作异构化的催化剂的模拟移动床和用于烷烃的吸附剂使烷烃连续异构化以产生异构化产物的方法。 烷烃可以是正丁烷,异构化产物2-甲基丙烷,烷烃可以是正戊烷,异构化产物2-甲基丁烷或2,2-二甲基丙烷,烷烃可以具有6个至约8个碳原子,没有 多于一个甲基支链和具有相同数目的碳原子和至少两个甲基支链的异构化产物,或者反应物可以是前述烷烃与形成相应的异构化产物的混合物。 在模拟移动床的区域中,烷烃被催化异构化以形成异构化产物。 未反应的烷烃被吸附,收集异构化产物。 在模拟移动床的随后区域中,未反应的烷烃使用解吸剂解吸,并且可以被催化异构化以形成也被分离和收集的另外的异构化产物。 在模拟移动床中使用的催化剂可以是钨酸氧化锆上的铂,模拟移动床中使用的吸附剂可以是EU-1,ZSM-12,SAPO-5,Y-82,八面沸石,毛沸石,沸石β与 钠,锂,钾,钡,钙,锶或其组合,与钙和锶交换的沸石X,与钠,锂,钾,钡,钙,锶或它们的组合交换的丝光沸石。
    • 4. 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。
    • 5. 发明授权
    • Process for continuous reaction and deparation using reactive
chromatography
    • 使用反应层析连续反应和分离的方法
    • US5744683A
    • 1998-04-28
    • US666713
    • 1996-06-18
    • Hemant W. DandekarGregory A. FunkSimon H. HobbsMasami KojimaRalph D. GillespieHerman A. ZinnenCharles P. McGonegal
    • Hemant W. DandekarGregory A. FunkSimon H. HobbsMasami KojimaRalph D. GillespieHerman A. ZinnenCharles P. McGonegal
    • C07C5/27C07C9/16C07C5/13C07C7/12
    • C07C9/16C07C5/2791C07C2521/04C07C2523/42C07C2527/126C07C2529/44Y02P20/582
    • A process for the continuous isomerization of an alkane to produce an isomerized product through contacting the alkane with a simulated moving bed acting as a catalyst for isomerization and an adsorbent for the alkanes has been developed. The alkane may be n-butane and the isomerized product 2-methylpropane, the alkane may be n-pentane and the isomerized product 2-methylbutane or 2,2-dimethylpropane, the alkane may have from 6 up to about 8 carbon atoms with no more than one methyl branch and the isomerized product having the same number of carbon atoms and at least two methyl branches, or the reactant may be a mixture of the foregoing alkanes with the corresponding isomerized products being formed. In a zone of the simulated moving bed, the alkanes are catalytically isomerized to form the isomerized products. The unreacted alkanes are adsorbed, and the isomerized products are collected. In a first subsequent zone of the simulated moving bed, a large portion of the unreacted alkanes are desorbed using a desorbent. In a second subsequent zone of the simulated moving bed, residual adsorbed alkanes are desorbed using a mixture of desorbent and isomerized products, and the desorbed residual alkanes may be removed from the simulated moving bed or may be reacted to form additional isomerized products. The isomerized products are removed from the simulated moving bed and collected. The process may also be used to effect other chemical reactions with the concurrent separation of product.
    • 已经开发了通过使烷烃与用作异构化的催化剂的模拟移动床和用于烷烃的吸附剂使烷烃连续异构化以产生异构化产物的方法。 烷烃可以是正丁烷,异构化产物2-甲基丙烷,烷烃可以是正戊烷,异构化产物2-甲基丁烷或2,2-二甲基丙烷,烷烃可以具有6个至约8个碳原子,没有 多于一个甲基支链和具有相同数目的碳原子和至少两个甲基支链的异构化产物,或者反应物可以是前述烷烃与形成相应的异构化产物的混合物。 在模拟移动床的区域中,烷烃被催化异构化以形成异构化产物。 未反应的烷烃被吸附,收集异构化产物。 在模拟移动床的第一后续区域中,大部分未反应的烷烃使用解吸剂解吸附。 在模拟移动床的第二个随后的区域中,残余吸附的烷烃使用解吸剂和异构化产物的混合物解吸,并且解吸的残余烷烃可以从模拟的移动床中除去,或者可以反应形成另外的异构化产物。 将异构化产物从模拟移动床上取出并收集。 该方法也可用于通过产品的同时分离来实现其它化学反应。