The present invention relates to a process for the preparation of modified ZSM-5 molecular sieves, which comprises conducting a co-feeding reaction of methanol and naphtha over a modified ZSM-5 molecular sieve catalyst to produce low-carbon olefins and / or aromatic hydrocarbons Catalytic catalytic cracking reaction of naphtha using a catalyst. In the process, the modified ZSM-5 molecular sieve catalyst comprises, by weight percent, 25-80 wt% ZSM-5 molecular sieve, 15-70 wt% binder, and 2.2-6.0 wt% Of lanthanum and 1.0-2.8 wt% phosphorus. The naphtha contains 63.8-89.5 wt% saturated chain alkane and 5.6-29.8 wt% cyclic alkane. The naphtha and methanol pass through the catalyst bed at the same time and the reaction takes place during the contact with the catalyst at a reaction temperature of 550-670 ° C. The mass ratio of methanol to naphtha is 0.05-0.8 and the total mass space velocity of naphtha and methanol mass space velocity) is 1.0-5 h -1 .
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机译：本发明涉及一种制备改性的ZSM-5分子筛的方法，该方法包括在改性的ZSM-5分子筛催化剂上进行甲醇和石脑油的共同进料反应，以生产低碳烯烃和/或芳族烃。使用催化剂的石脑油催化催化裂化反应。在该方法中，改性的ZSM-5分子筛催化剂包含按重量百分比计的25-80重量％的ZSM-5分子筛，15-70重量％的粘合剂以及2.2-6.0重量％的镧和1.0-2.8重量％。磷。石脑油含有63.8-89.5重量％的饱和链烷烃和5.6-29.8重量％的环状烷烃。石脑油和甲醇同时通过催化剂床，并且在与催化剂接触期间在550-670°C的反应温度下进行反应。甲醇与石脑油的质量比为0.05-0.8，总质量石脑油的空速和甲醇的质量空速）为1.0-5 h -1 。
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