CuSAPO-34 molecular sieves were synthesized through a short-time reconstruction method by using molecular sieve seeds containing copper as the copper source.The influence of the type of template agent on properties of the seed crys-tals,CuSAPO-34 molecular sieves and the reaction performance of methanol to olefins was investigated.The results showed that the seed crystal synthesized using triethylamine and diethylamine as mixed tem-plate agents had lower crystallinity and smaller grain size;the CuSAPO-34 molecular sieve prepared from this seed crystal had strong acidity and high olefin selectivity.The selectivity of ethylene was 47.41％,the selectivity of ethylene+propylene+butylene was 90.37％,and n(ethylene)/n(propylene)was 1.37.
关键词
甲醇制烯烃/CuSAPO-34分子筛/晶种/重构法/乙烯/丙烯/丁烯
Key words
methanol to olefins/CuSAPO-34 molecular sieve/seed crystal/reconstruction method/ethylene/propylene/butylene
维普
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