公开(公告)号：US6137020A

公开(公告)日：2000-10-24

申请号：US127025

申请日：1998-07-31

申请人： James R. Butler ,  Mark E. Kuchenmeister

发明人： James R. Butler ,  Mark E. Kuchenmeister

IPC分类号： C07C2/66 ,  C07C15/073 ,  C07C15/067

CPC分类号： C07C15/073 ,  C07C2/66 ,  C07C2529/035

摘要： A process for reducing the amount of undesirable byproducts, for example multi-ring compounds known as heavy residue in a process for the alkylation of an aromatic hydrocarbon with an olefin using a silicalite catalyst is disclosed. The process comprises supplying a feedstock containing benzene to a reaction zone with an alkylating agent in a molar ratio of benzene to alkylating agent of from about 2:1 to about 20:1 and into contact with an aluminosilicate alkylation catalyst having an average crystallite size of less than about 0.50 .mu.m and wherein the size of about 90% of the crystallites is less than 0.70 .mu.m. The catalyst is characterized by an Si/Al atomic ratio in the range from between 50 and 150 and a maximum pore size in the range from about 1000 to 1800 .ANG.. The catalyst has a sodium content of less than about 50 ppm and the reaction is carried out under conversion conditions including a temperature of from about 250.degree. C. to about 550.degree. C. and a pressure of from about 200 psi to about 500 psi.

摘要翻译： 公开了一种减少不需要的副产物的方法，例如在使用硅沸石催化剂的烯烃烷基化芳族烃的方法中称为重残基的多环化合物。 该方法包括将含苯的原料与苯与烷基化剂的摩尔比为约2:1至约20:1的烷基化剂供应到反应区，并与平均微晶尺寸为的硅铝酸盐烷基化催化剂接触 小于约0.50μm，其中约90％的微晶的尺寸小于0.70μm。 催化剂的特征在于Si / Al原子比在50至150之间，最大孔径在约1000至1800安培的范围内。 催化剂的钠含量小于约50ppm，反应在包括温度为约250℃至约550℃，压力为约200psi至约500psi的转化条件下进行。