公开(公告)号：WO2003076369A1

公开(公告)日：2003-09-18

申请号：PCT/US2003/001437

申请日：2003-01-16

Applicant: SASOL NORTH AMERICA INC.

Inventor： WINDER, J. Barry ,  WHARRY, Donald L. ,  SCHELL, John R. ,  BROWN, Mary J. ,  MURRAY, Joy L. ,  HOWE, Richard C. ,  SORENSON, Wayne L. ,  SZURA, Daniel P.

IPC: C07C2/64

CPC classification number: C07C2/66 ,  Y02P20/127

Abstract: A unified process for reactive distillation under pressure for the alkylation of light aromatic hydrocarbons such as benzene and cumene with straight chain C 6 - C 18 olefins using a solid acid alkylation catalyst supported in the reflux zone of the distillation column (column 2). The process is continuous, using a reactive distillation configuration such that at least a portion of the olefin (7) is injected below the benzene rectification zone at the top of the column. The aromatic hydrocarbon (17) is injected continuously at a low rate above the rectification zone (H) at the base of the column and above the reboiler (40). The alkylation reaction takes place primarily in the liquid phase on the solid acid catalyst and is characterized in that the molar ratio is adjustable up to about 100/1, through adjustment of the internal column operating pressure, the benzene reflux rate, the amount of benzene removed from the reflux condenser to storage or from the reboiler with the distillation column operated at or near total aromatic hydrocarbon reflux. The unexpectedly high liquid phase aromatic hydrocarbon to olefin molar ratios achieved in the reactive distillation column increases the selectivity to mono-alkylated aromatics and helps stabilize catalyst lifetime.

Abstract translation: 使用在蒸馏塔的回流区（柱2）中负载的固体酸烷基化催化剂，在压力下进行反应蒸馏的统一方法，用于烷基化轻质芳烃如苯和枯烯与直链C6-C18烯烃。 该方法是连续的，使用反应蒸馏构型使得至少一部分烯烃（7）被注入塔顶部的苯精馏区下方。 在柱的底部和再沸器（40）上方的芳香族烃（17）以低于精馏区（H）的低速连续注入。 烷基化反应主要发生在固体酸催化剂上的液相中，其特征在于通过调整内部柱的工作压力，苯回流速率，苯的量，摩尔比可调至高达约100/1 从回流冷凝器中取出至储存或从再沸器与蒸馏塔一起运行或接近总芳烃回流。 在反应蒸馏塔中实现的意想不到的高液相芳烃与烯烃摩尔比提高了对单烷基化芳族化合物的选择性，有助于稳定催化剂寿命。