METHOD FOR RECOVERING MOLYBDENUM AND METHOD FOR PREPARING CATALYST

摘要

A method for obtaining a material containing recovered molybdenum for use in the preparation of a catalyst from a molybdenum-containing material containing at least molybdenum, A element (phosphorus and/or arsenic) and X element (at least one selected from the group consisting of potassium, rubidium, cesium and thallium), in particular, from a spent catalyst; and a method for preparing a catalyst using said material containing recovered molybdenum. A particularly preferred catalyst is a catalyst for use in the production of methacrylic acid through gas phase catalytic oxidation.