During the preparation of titanium silicalite TS-1 by hydrothermal crystallization method,there is a problem of mismatched hydrolysis rates between silicon and titanium sources.This problem can be solved by the crystal dissolution crystallization method,but the influence of synthesis conditions has not been systematically studied.The effects of synthesis conditions such as titanium source,alkalinity,water content,and crystallization temperature on the preparation of TS-1 by crystal dissolution crystallization method are investigated in this arti-cle.The results show that TS-1 zeolite synthesized from inorganic titanium source has more advantages,while alkalinity,water content,and crystallization temperature should be appropriate.Both too high and too low will have negative effects.The optimized synthesis conditions obtained comprehensively are:the good catalytic per-formance of TS-1 zeolite synthesized under the conditions of inorganic titanium source(TiCl3,Ti(SO4)2,TiOSO4),alkalinity HCl/TP AO H ratio of 0.1,water content H2O/SiO2 ratio of 34,and crystallization tem-perature of 170 ℃.This research result has important guiding significance for the industrial production of TS-1 zeolite.
关键词
钛硅分子筛/TS-1/晶体溶解-晶化法/合成条件/催化性能
Key words
titanium silicalite/TS-1/crystal dissolution and crystallization method/synthesis conditions/cata-lytic performance
维普
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