公开(公告)号：WO2003076074A1

公开(公告)日：2003-09-18

申请号：PCT/US2003/001432

申请日：2003-01-16

Applicant: SASOL NORTH AMERICA INC.

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

IPC: B01J38/50

CPC classification number: B01J29/90 ,  B01D3/009 ,  C07C2/66 ,  Y02P20/127 ,  Y02P20/584

Abstract: A unified process which couples a unique in-situ catalyst regeneration process with a continuous reactive distillation under pressure for the alkylation of light aromatic hydrocarbons such as benzene with C 2 -C 30 olefins using a solid acid alkylation catalyst supported in the reflux zone (21) of a distillation column (section A). Periodic regeneration of the catalyst (sections E, F and G) is carried out with a countercurrent injection of a C 4 -C 16 paraffin (35) below the benzene rectification zone at the top of the column, but above the catalyst zone while the aromatic hydrocarbon reaction feedstock (17) is injected continuously at a point above a rectification zone at the base of the column where the aromatic compound is separated from the paraffin and by-products washed from the catalyst. The use of the C 4 -C 16 paraffin with the aromatic at a mole fraction in the range of 40 to 90% enables a regeneration temperature of about 175 - 250°C. to be achieved and maintained by adjusting the column pressure and aromatic reflux rate. Significantly lower pressures, on the order of 125 to 370 psig, are required to achieve regeneration temperature than would be otherwise required with the use only of the aromatic hydrocarbon to dilute and wash the by-products from the catalyst surfaces.

Abstract translation: 将独特的原位催化剂再生过程与压力下的连续反应蒸馏相结合的方法，用于使用在C 2 -C 30烯烃的回流区（21）中负载的固体酸烷基化催化剂烷基化轻质芳烃如C 2 -C 30烯烃 蒸馏塔（A部分）。 催化剂（部分E，F和G）的定期再生通过在塔顶部但在催化剂区上方的苯精馏区下面的C4-C16石蜡（35）逆流注入来进行，而芳族烃 将反应原料（17）连续注入塔的底部的精馏区上方，其中芳族化合物与石蜡分离，副产物从催化剂中洗脱。 使用具有40至90％摩尔分数的芳族化合物的C 4 -C 16石蜡使得能够通过调节柱压力和芳族回流速率来实现和维持约175-250℃的再生温度。 需要显着降低约125至370psig的压力以实现再生温度，而不是仅使用芳烃从催化剂表面稀释和洗涤副产物所需的压力。