Gromov Nikolay V, Medvedeva Tatiana B, Rodikova Yulia A, Babushkin Dmitrii E, Panchenko Valentina N, Timofeeva Maria N, Zhizhina Elena G, Taran Oxana P, Parmon Valentin N
Boreskov Institute of Catalysis SB RAS Lavrentiev Av., 5 Novosibirsk 630090 Russia
RSC Adv. 2020 Aug 4;10(48):28856-28864. doi: 10.1039/d0ra05501h. eCollection 2020 Aug 3.
Solid bifunctional catalysts based on cesium salts of V-containing heteropoly acids (CsHPA: CsHPWVO, CsHSiWVO, CsHPMoVO) and CsHPMoO were used for studying one-pot hydrolysis-oxidation of potato starch to formic acid at 413-443 K and 2 MPa air mixture. It was shown that the optimum process temperature that prevents formic acid from destruction is 423 K. The studies were focused on the influence of the composition of heteropoly anions on the yield and selectivity of formic acid. Using W-V-P(Si) CsHPA results in the product overoxidation compared to Mo-V-containing CsHPA. The activity of Cs-PMo was significantly lower compared to Cs-PMoV. This may indicate that vanadium plays an important role in the oxidation process. The most promising catalyst was CsHPMoVO which provided the maximum yield of formic acid equal to 51%. CsHPMoVO was tested during nine cycles of starch hydrolysis-oxidation to demonstrate its high stability and efficiency.
基于含钒杂多酸铯盐（CsHPA：CsHPWVO、CsHSiWVO、CsHPMoVO）和CsHPMoO的固体双功能催化剂用于研究在413 - 443 K和2 MPa空气混合物条件下马铃薯淀粉一锅法水解氧化制备甲酸。结果表明，防止甲酸分解的最佳工艺温度为423 K。研究重点在于杂多阴离子组成对甲酸产率和选择性的影响。与含钼 - 钒的CsHPA相比，使用钨 - 钒 - 磷（硅）CsHPA会导致产物过度氧化。Cs - PMo的活性明显低于Cs - PMoV。这可能表明钒在氧化过程中起重要作用。最有前景的催化剂是CsHPMoVO，其甲酸最大产率可达51%。对CsHPMoVO进行了九个淀粉水解氧化循环测试，以证明其高稳定性和高效性。
