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Vapor-Phase Esterification of Benzoic Acids with Ethyl Alcohol Effect of Oxides on Catalytic Activity of Silica Gel

✍ Scribed by Vernon, Arthur A.; Brown, Bertram M.

Book ID
126883982
Publisher
American Chemical Society
Year
1940
Weight
367 KB
Volume
32
Category
Article
ISSN
0019-7866

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## Abstract Different ratios of phosphotungestic acid supported on silica gel were prepared by an impregnation method with PWA loadings ranging from 1 to 30% w/w and calcined at 350 and 500 Β°C for 4 h in a static air atmosphere. The catalysts were characterized by thermogravimety (TG), differential