US 6,908,603 B2  13  14  24.  The process of claim  23  wherein said additive catalyst  is present in amounts of 1 to less than 10 wt.  %  relative to  the total amount of catalyst.  * * * * *  22.  The process of claim  20  wherein said catalytic crack› ing is fluidized catalytic cracking.  23.  The process of claim  20  wherein said additive catalyst  is present in amounts of 1 to 50 wt.  %  relative to the total  amount of catalyst. 