Supported on silica B-P-V-W-O_x catalysts of the aldol condensation process, subjected to hydrothermal treatment (HTT), were synthesized and characterized. It was found that HTT of silica has a significant effect on catalyst texture, namely specific surface area, pore size. These properties affect the distribution of the active phase on the support surface. It was suggested that this is the reason of change in acid-base characteristics of the catalysts. It was observed that HTT at 100-150 °C leads to increase in surface, available for the reagents, ability to sorb acetic acid, decrease of acidity, improving catalytic activity and selectivity. It had been demonstrated that HTT allows to increase acrylic acid yield up to 67.6% which is 10% higher compared to that for catalyst supported on initial silica. The HTT of silica support before the active phase deposition is suggested as a cheap and efficient way to improve catalytic performance of B-P-V-W-O_x/SiO₂ catalysts.

在二氧化硅BPVWO _x上受支持合成并表征了经过水热处理（HTT）的羟醛缩合过程的催化剂。已经发现二氧化硅的HTT对催化剂的质地，即比表面积，孔径具有显着影响。这些性质影响活性相在载体表面上的分布。认为这是催化剂的酸碱特性变化的原因。观察到在100-150°C的HTT会导致表面增加，可用于试剂，吸收乙酸的能力，降低酸度，提高催化活性和选择性。业已证明，HTT可使丙烯酸的收率提高至67.6％，这比负载在初始二氧化硅上的催化剂的收率高10％。_x / SiO ₂催化剂。