Patent ID: 8450232
Filing Date: 2013-05-28
Classification: B01J,C07C

Abstract:
1. A method for improving the activity of acidic zeolitic catalysts, the method comprising: contacting an acidic zeolitic catalyst comprising at least one from the group consisting of zeolite Beta, ZSM-5, ZSM-22, ZSM-23, MCM-22, and MCM-49 having surface non-framework aluminum and framework aluminum with an organic dibasic acid at a catalyst to acid weight ratio in the range from about 2:1 to about 20:1 and at a temperature in the range from about 50° C. to about 100° C. for a duration of up to about 2 hours to selectively remove at least a portion of the surface non-framework aluminum, thereby forming a selectively dealuminated zeolitic catalyst; wherein the selectively dealuminated zeolitic catalyst has a measured first-order rate constant, k