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Direct conversion of xylose to butyl levulinate over mesoporous zirconium silicates with an integrated dehydration alcoholysis process
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.5 ) Pub Date : 2020-09-29 , DOI: 10.1016/j.jtice.2020.09.007
Sahar Nazer , Alireza Najafi Chermahini , Bahram Hosseini Monjezi , Hossein A. Dabbagh

Organic intermediates, like n-butyl levulinate, have a widespread application, especially in organic synthesis. Thus, direct synthesis of n-butyl levulinate from xylose was investigated over the mesoporous zirconium silicate catalysts (KITZx (X = 20,10)). The catalysts were identified through various methods like FESEM, EDS, XRD, FT-IR, nitrogen adsorption-desorption, ICP-AES, and NH3-TPD). An integrated catalytic protocol includes dehydration, and alcoholysis led to the selective formation of n-butyl levulinate and gave a yield of 87.7% over KITZ20 under optimal conditions. Various reaction parameters, for example, the effect of temperature, reaction time, the influence of the catalyst, and the amount of xylose were investigated. The spent catalyst can be effectively recovered after the thermal regeneration of KITZ20 and has good reusability.



中文翻译:

介孔硅酸锆通过集成脱水醇解法将木糖直接转化为乙酰丙酸丁酯

有机中间体,如乙酰丙酸正丁酯,具有广泛的应用,特别是在有机合成中。因此,在介孔硅酸锆催化剂(KITZx(X  = 20,10))上研究了由木糖直接合成乙酰丙酸正丁酯的方法。通过FESEM,EDS,XRD,FT-IR,氮吸附-解吸,ICP-AES和NH 3等多种方法鉴定了催化剂-TPD)。综合的催化方案包括脱水,并且醇解作用可导致乙酰丙酸正丁酯的选择性形成,在最佳条件下的收率比KITZ20高出87.7%。研究了各种反应参数,例如温度,反应时间,催化剂的影响以及木糖的量。KITZ20进行热再生后,可以有效回收废催化剂,并且具有良好的可重复使用性。

更新日期:2020-10-16
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