In this study, a novel heterogeneous catalyst based on silicotungstic acid (STA) has been synthesised using hydrothermal and wet-impregnation methods for methanol–acetic acid esterification. Active compound STA was loaded on MCM-48 support material to compose proposed catalysis. Tungsten (W) to silica (Si) molar ratios were set as 5%, 10%, 20% and 40%. Characterizations of MCM-48 and STA/MCM-48 catalysts were performed using BET, XRD, FT-IR, DRIFT, TGA/DTA, SEM, and EDX mapping analysis. Results showed successful synthesis of the novel catalyst with good thermal stability and formation of both Brønsted acid and Lewis acid sites. The catalytic activity was also investigated in methyl acetate esterification reaction and it was shown that temperature, reaction time and the molar ratio of the reactants had significant effect on conversion rate. The highest catalytic activity was obtained as 84% with 20% catalyst at feed ratio of 1:3 (metanol:acetic acid, 353 K, 27 h).

在这项研究中，已经使用水热和湿法浸渍法合成了一种基于硅钨酸（STA）的新型多相催化剂，用于甲醇-乙酸酯化反应。将活性化合物STA负载在MCM-48载体材料上以构成拟议的催化作用。钨（W）与二氧化硅（Si）的摩尔比设定为5％，10％，20％和40％。使用BET，XRD，FT-IR，DRIFT，TGA / DTA，SEM和EDX作图分析对MCM-48和STA / MCM-48催化剂进行表征。结果表明，成功合成了具有良好热稳定性的新型催化剂，并形成了布朗斯台德酸和路易斯酸。还研究了乙酸甲酯酯化反应的催化活性，结果表明温度，反应时间和反应物的摩尔比对转化率有显着影响。