公开(公告)号：US07696394B2

公开(公告)日：2010-04-13

申请号：US12327682

申请日：2008-12-03

申请人： James R. Butler ,  Marcus Ledoux ,  Michael Betbeze

发明人： James R. Butler ,  Marcus Ledoux ,  Michael Betbeze

IPC分类号： C06C2/58 ,  C07C5/327

CPC分类号： C07C5/333 ,  C07C2529/06 ,  C07C15/46

摘要： Methods and processes for reducing alkylation catalyst poisoning are described herein. Such methods generally include providing a dehydrogenation system including a dehydrogenation reactor and a separation system, wherein the separation system includes a first column and a second column, introducing an alkyl aromatic hydrocarbon into the dehydrogenation reactor, contacting the alkyl aromatic hydrocarbon with a dehydrogenation catalyst disposed within the dehydrogenation reactor to form a dehydrogenation output stream comprising a vinyl aromatic hydrocarbon, passing at least a portion of the dehydrogenation output stream to first column, recovering a first overhead fraction including benzene and a first bottoms fraction from the first column, passing at least a portion of the benzene from the first column to an alkylation system including an alkylation catalyst, passing the first bottoms fraction from the first column to the second column, recovering a second overhead fraction and a second bottoms fraction from the second column, withdrawing offtest from effluent streams selected from the dehydrogenation output stream, the first bottoms fraction, the second bottoms fraction and combinations thereof to form withdrawn offtest and introducing the withdrawn offtest into the separation system downstream from the first column.

摘要翻译： 本文描述了用于还原烷基化催化剂中毒的方法和方法。 这样的方法通常包括提供包括脱氢反应器和分离系统的脱氢系统，其中分离系统包括第一塔和第二塔，将烷基芳烃引入脱氢反应器中，使烷基芳族烃与脱氢催化剂接触 在脱氢反应器内以形成包含乙烯基芳族烃的脱氢输出物流，将至少一部分脱氢输出流送至第一塔，从第一塔回收包括苯和第一塔底馏分的第一塔顶馏分，至少通过 从第一塔的一部分苯到包含烷基化催化剂的烷基化体系，将第一塔底馏分从第一塔通到第二塔，从第二塔回收第二塔顶馏分和第二塔底馏分， 流出物流 选自脱氢输出流，第一塔底馏分，第二塔底馏分及其组合，以形成退出，并将排出的最后馏分引入第一塔下游的分离系统。