Reaction of Formalin with Acetic Acid over Vanadium鈥揚hosphorus Oxide Bifunctional Catalyst

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• 作者：Dan Yang ; Dan Li ; Haoyu Yao ; Guoliang Zhang ; Tiantian Jiao ; Zengxi Li ; Chunshan Li ; Suojiang Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：July 15, 2015
• 年：2015
• 卷：54
• 期：27
• 页码：6865-6873
• 全文大小：623K
• ISSN：1520-5045

文摘

A new route to synthesizing acrylic acid from acetic acid and formalin by one-step aldol condensation reaction was proposed and developed. V鈥揚/SiO₂ oxide bifunctional catalysts were designed and prepared by ultrasonic impregnation method. The catalysts were characterized by XRD, BET, TEM, TG/DTA, and XPS, as well as NH₃- and CO₂-TPD and pyridine-FTIR methods. Catalytic performance was evaluated using a fixed-bed tubular microreactor operating with a CH₃COOH/HCHO (HAc/FA) molar ratio of 10 under atmospheric pressure. Influences of the balance between acidic and alkaline sites, as well as ratio of V⁴⁺ and V⁵⁺, on catalyst activity were further studied. Reaction parameters were systemically optimized. Through a series of comparisons, V鈥揚/SiO₂ binary oxide catalyst with a bulk density ratio of 1:2 was selected.