Acrylic acid restructuring

Acetic acid formed via isopropanol and acetone could involve Mo " species. With the second way, acrolein and acrylic acid are obtained with the participation of Mo species. When the temperature increases the first way of the scheme is favored owing to a surface restructuration of the oxide Mo 03 which can contain pentacoordinated molybdenum species. The addition of bismuth to these phases decreases slightly the activity, the formation of acetic acid being supressed. When water is added to the reagent stream, the activity does not change, but the desorption of oxygenated compounds is favored and the selectivity towards acids enhanced. 

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