The acidities of HY, USHY and SSHY zeolites were modified by K 2SO 4 solution , the acid strength and acid amount of zeolites could be controled by adjusting the concentration and temperature of K 2SO 4 solution and the frequency of exchange.

• 用K2SO4 溶液对HY、USHY 和SSHY 沸石的酸性进行改性，通过调节K2SO4 溶液的浓度、温度和交换次数，可控制沸石的酸强度和酸量。