PREPARATION OF MODIFIED ALUMINA AND FLUIDIZABLE CATALYTIC CRACKING CATALYST USING THE MODIFIED ALUMINA

摘要

PURPOSE: To provide a zeolite-contg. cracking catalyst containing modified alumina which has excellent metal durability and which gives a good tower top-bottom conversion rate. ;CONSTITUTION: This preparation method of modified alumina includes a process to bring an alumina hydrate into contact with aq. soln. of an acid selected from formic acid, acetic acid and proplonic acid at 25 to 110°C for 1 to 100 hours, a process to control the final pH to ≤4, and a process to separate a solid reaction product.;COPYRIGHT: (C)1994,JPO