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Preparation of Immobilized Phosphotungstic Acid by Sol-Gel Method and Catalytic Synthesis of Anthraquinone
Pages: 308-313
Year: Issue:  3
Journal: Petrochemical Technology

Keyword:  磷钨酸催化剂溶胶-凝胶法邻苯甲酰苯甲酸蒽醌乙醇正硅酸乙酯;
Abstract: 采用溶胶-凝胶法制备了负载型磷钨酸催化剂,并将其用于催化邻苯甲酰苯甲酸(BBA)合成蒽醌.考察了溶剂种类、水与正硅酸乙酯的摩尔比(水硅比)、乙醇与正硅酸乙酯的摩尔比、水解温度、磷钨酸负载量、焙烧温度等制备条件对催化剂活性的影响,得到制备催化剂的适宜条件:以乙醇为溶剂,水解液pH为3.8,水解温度80 ℃,水硅比为5,乙醇与正硅酸乙酯的摩尔比为2,干燥温度120 ℃,在250 ℃下焙烧,磷钨酸负载量...
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