Abstract

The paper presents the results of studies of catalytic properties of cesium salts of heteropoly acids Cs_4–хH_хSiW₁₂O₄₀ (x = 3 and 3.5), Cs_3–хH_хPMo₁₂O₄₀ and Cs_3–хH_хPW₁₂O₄₀ (x = 2 and 2.5) for hydrolysis of cellulose to glucose at 180°C under argon atmosphere. Glucose is shown to be the main reaction product. The maximum hourly yield equal to 23% is observed in the presence of Cs₃HSiW₁₂O₄₀. It is assumed that the catalyst efficiency is affected by the specific surface area. It is established that both heterogeneous and homogeneous processes occur in the presence of the salts due to leaching of the active component to the solution. The prepared salts are demonstrated to be more efficient than systems reported previously in literature.

中文翻译：

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杂多酸铯盐催化的纤维素水解

摘要

本文提出的杂多的铯盐的催化性质的研究的结果的酸铯_{4- х} ħ _х硅钨酸₁₂ ø ₄₀（X = 3和3.5），CS _{3- х} ħ _х PMO ₁₂ ö ₄₀和Cs _{3- х} ħ _х PW ₁₂ ø ₄₀（X = 2和2.5）对纤维素的水解在180℃氩气气氛下于葡萄糖。葡萄糖是主要反应产物。在存在Cs ₃ HSiW ₁₂ O的情况下，观察到的最大小时产量等于23％₄₀。假定催化剂效率受比表面积的影响。已经确定，由于活性成分向溶液中的浸出，在盐的存在下发生了非均相过程和均相过程。所制备的盐被证明比文献中先前报道的系统更有效。