Being the manner which prepares the mannered null hetero polyacid compound which synthesizes the hetero polyacid catalytic converter for oxidizing

摘要

This invention, being, the hetero polyacid compound catalyst for oxidizing to the unsaturated carboxylic acid such as methacrylic acid of unsaturated aldehyde such as meta clo lane, contains the molybdenum, phosphorus, the bismuth and M'no oxide, the M'ga cesium, regards the method of synthesizing the catalyst which is the kalium, rubidium or the sodium here. This method is synthesis of the catalyst with the process condition of specification in order to add the bismuth compound nitric acid as the water slurry which is not included. The catalyst precusor removes the water, is formed by drying the solid particle. The hetero polyacid compound catalyst is formed by the calcination of the catalyst precusor.