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通过对一种ＦＣＣ催化剂水热稳定性的实验研究，揭示了催化剂酸性、分子筛破坏程度、晶胞常数和硅铝原子比等参数受水热处理条件影响的一些规律。发现温度在７５０～８００°Ｃ之间时催化剂的总酸量降低很快，而强酸与总酸之比随分子筛脱铝量的增多而增大；在８５０°Ｃ、样品处理时间大于４ｈ时，晶胞常数降到２．４２７ｎｍ，硅铝原子比增大到２０．１，剩下的酸基本上是强酸，而且分子筛的相对破坏程度达到６０％。
Through the experimental study on the hydrothermal stability of a FCC catalyst, some laws of the catalyst acidity, the degree of molecular sieve destruction, the unit cell constant and the atomic ratio of silicon to aluminum and other parameters affected by the hydrothermal treatment conditions were revealed. It was found that when the temperature was between 750 and 800 ° C, the total acid amount of the catalyst decreased rapidly while the ratio of the strong acid to the total acid increased with the amount of the dealumination of the molecular sieve. At 850 ° C, when the sample processing time was more than 4h, The unit cell constant is reduced to 2.427 nm, the atomic ratio of silicon to aluminum is increased to 20.1, and the remaining acid is essentially a strong acid, and the relative degree of molecular sieve destruction is 60%.