Mitsubishi Rayon Company, Limited

Yutaka Kinoshita

Motomu Oh-Kita

Shinji Yamamoto

Kazuhiro Ishii

Toru Kuroda

Masako Usui

A process for preparing a multi-component catalyst for producing methacrylic acid containing phosphorus, molybdenum and vanadium comprising using in preparing the catalyst, at least one number selected from the group consisting of the oxide, carbonates, acetates and hydroxides of each catalyst-constituting element as a source of the element; dissolving or dispersing the selected sources of the catalyst-constituting elements in water; adding at least one member selected from the group consisting of ammonium carbonate, ammonium hydrogen-carbonate, ammonium sulfate and ammonium hydrogen-sulfate to the resulting aqueous solution or dispersion; removing water therefrom and then heat-treating the residual product.

Process of preparing catalysts for producing methacrylic acid

In a process for preparing a catalyst for producing methacrylic acid represented by the formula,

Process for preparing catalysts for producing methacrylic acid

A process for producing methacrylic acid which includes subjecting methacrolein to gaseous phase catalytic oxidation using molecular oxygen and a catalyst represented by the general formula:

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Otake, Japan

Yutaka Kinoshita