Infrared Study on Interaction Between Methacrolein and Catalyst H_4PMo_(11)V_1O_(4O)/SiO_2

• 出 处: Chemical Journal of Chinese Universities
• 发表日期: 1987年02期
• 关键词: Infrared bands anion adsorbed hydroxyl characterizing oxidizing carbonyl disappe

In this paper,we report the results of an infrared study on methacrolein (MAL) adsorption on heteropoly acid catalyst,H4-PMO11V1O40/SiO2 Three surface species,CH2=C(CH3)-CHO (I),CH22=C(CH3)-CO(II) and CH2=C(CH3) were formed on the catalyst surface.We consider that they are the intermediates to form methacrylic acid (MAA).It was found that at 300℃ MAL chemisorption did not occur on the catalyst surface treated with evacuation and v(p-o) and v(M3-O-Me) bands characterizing the heteropoly acid anion structure disappeared (Me: Mo or V)

In this paper, we report the results of an infrared study on methacrolein (MAL) adsorption on heteropoly acid catalyst, H4-PMO11V1O40 / SiO2 three surface species, CH2 = C (CH3) -CHO (I) -CO (II) and CH2 = C (CH3) were formed on the catalyst surface. We consider that they are the intermediates to form methacrylic acid (MAA) .It was found that at 300 ° C MAL chemisorption did not occur on the catalyst surface treated with evacuation and v (po) and v (M3-O-Me) bands characterizing the heteropolyacid anion structure disappeared (Me: Mo or V)