Effect of carbon chain length on catalytic C O bond cleavage of polyols over Rh-ReOx/ZrO2 in aqueous phase
作者:Achraf Sadier、Noémie Perret、Denilson Da Silva Perez、Michèle Besson、Catherine Pinel
DOI:10.1016/j.apcata.2019.117213
日期:2019.9
-tetraols, -triols, -diols, and hexanols) is achievable by hydrogenolysis of erythritol, xylitol, and sorbitol over supported-bimetallic Rh-ReOx (Re/Rh molar ratio 0.5) catalyst, respectively. After validation of the analytical methodology, the effect of some reaction parameters was studied. In addition to CO bond cleavage by hydrogenolysis, these polyols can undergo parallel reactions such as epimerization
线性脱氧的C4(丁三醇,-二醇和丁醇),C5(戊四醇,-三醇,-二醇和戊醇)和C6产品(己烷五醇,-四醇,-三醇,-二醇和己醇)的生产可以实现赤藓糖醇,木糖醇和山梨糖醇分别在负载型双金属Rh-ReO x(Re / Rh摩尔比0.5)催化剂上进行氢解。在验证了分析方法之后,研究了一些反应参数的影响。除了通过氢解裂解C O键外,这些多元醇还可以进行平行反应,例如差向异构化,循环脱水和CC键裂解。线性脱氧C4,C5和C6产品每个家族的时间进程证实,不同类别的脱氧产品的出现顺序遵循多重顺序的脱氧途径。在高压下,在3.7wt。%Rh-3.5wt。%ReO x / ZrO 2催化剂存在下,对线性脱氧的C4,C5和C6产物混合物的最高选择性在80%的转化率下是有利的(54–71% 80 bar下)在200°C下。