这个让人为难了这份专利是PCT申请，现在公开的版本里面还只有中文版的。只有一个摘要是英文版的，估计还是机器译的：A catalyst for preparing propylene and ethylene through C4 olefin catalytic cracking and the use thereof are provided. The main problem to be solved is that the hydrothermal stability of catalysts is bad at high temperature in the prior art and the yield of propylen...
