| abstract |
The present invention relates to a supported or bound heteropolyacid catalyst composition, a process for preparing the catalyst composition, and a process for oxidizing saturated and / or unsaturated aldehydes to unsaturated carboxylic acids using the catalyst composition About. The catalyst composition has a heteropolyacid component containing molybdenum, vanadium, phosphorus and cesium, and a support / binder having a surface area of about 0.1 m 2 / g to about 1.0 m 2 / g. In this catalyst, the compound of each component of the heteropolyacid compound is dissolved in a solution, the heteropolyacid compound is precipitated, the heteropolyacid compound is contacted to form a catalyst precursor, and the catalyst precursor is calcined. Produced by forming a heteropolyacid compound catalyst. Unsaturated aldehydes such as methacrolein are oxidized in the presence of the heteropolyacid compound catalyst to produce unsaturated carboxylic acids such as methacrylic acid. |