Synthesis method of hierarchical pore MTW type molecular sieve
A synthesis method and technology of molecular sieves, applied in the fields of molecular sieves and base exchange compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of limiting the application of microemulsion systems, the inability to obtain multi-stage molecular sieves, etc., and achieve the effect of wide application prospects
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Embodiment 1
[0035] 称取环己烷35g,向其中加入正戊醇3.3g,曲拉通X-100 6.7g,充分搅拌后所得混合液记作A;向烧杯中加入偏铝酸钠0.08g,加水3.90g,充分搅拌后再向其中加入25%的四乙基氢氧化铵溶液3.24g,最后加入40%的硅溶胶溶液6.6g,然后搅拌均匀,所得混合液记作B;称取5g B混合液,边搅拌边加入到A溶液,所得混合液记作C;向混合物C中加入2.9g曲拉通,搅拌均匀得到混合物D;将D转移到聚四氟乙烯内衬的反应釜中160℃晶化5天后,冷却至室温,用去离子水洗涤3次后置于120℃烘箱中干燥,经过550℃焙烧12h,制得MTW型分子筛。其XRD谱图如附 image 3 ;SEM图如附 Figure 4 . 所得MTW型分子筛的微孔孔容、总孔容、是否含大孔汇总于表1。
Embodiment 2
[0037]Weigh 32.7g of cyclohexane, add 4.1g of n-pentanol and 8.2g of Triton X-100 to it, and record the mixture as A after fully stirring; add 0.08g of sodium metaaluminate and 3.90g of water into the beaker After fully stirring, add 25% tetraethylammonium hydroxide solution 3.24g therein, finally add 40% silica sol solution 6.6g, then stir evenly, and the gained mixed solution is recorded as B; 5g B mixed solution is weighed, Add to solution A while stirring, and record the resulting mixture as C; add 3.1 g of Triton to mixture C, and stir evenly to obtain mixture D; transfer D to a polytetrafluoroethylene-lined reactor for crystallization at 160°C After 5 days, it was cooled to room temperature, washed with deionized water three times, dried in an oven at 120°C, and calcined at 550°C for 12 hours to obtain MTW molecular sieve. The microporous pore volume, total pore volume, and macropores of the obtained MTW molecular sieves are summarized in Table 1.
Embodiment 3
[0039] Weigh 32.7g of n-heptane, add 4.1g of n-hexanol and 8.2g of Triton X-100 into it, and record the mixture obtained after thorough stirring as A; add 0.08g of sodium metaaluminate and 3.90g of water into the beaker, After fully stirring, add 25% tetraethylammonium hydroxide solution 3.24g thereinto, finally add 40% silica sol solution 6.6g, then stir evenly, and the gained mixed solution is recorded as B; 5g B mixed solution is weighed, and Add solution A while stirring, and record the resulting mixture as C; add 3.5 g of Triton to mixture C, and stir evenly to obtain mixture D; transfer D to a Teflon-lined reactor for crystallization at 160°C for 5 After one day, cool to room temperature, wash with deionized water three times, dry in an oven at 120°C, and bake at 550°C for 12 hours to obtain MTW molecular sieve. The microporous pore volume, total pore volume, and macropores of the obtained MTW molecular sieves are summarized in Table 1.
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