Heteropolyacid amino resin catalyst as well as preparation method and application thereof

The invention relates to a heteropolyacid amino resin catalyst and a preparation method and application thereof.The preparation method comprises the steps that water-soluble heteropolyacid serves as a catalyst, urea, melamine and formaldehyde serve as raw materials to be subjected to copolymerization, heteropolyacid is chemically combined to the surface and the interior of a formed amino resin carrier in situ, heating curing and forming are further conducted at the temperature of 110-150 DEG C, and the heteropolyacid amino resin catalyst is obtained. The insoluble and infusible heteropolyacid amino resin catalyst is obtained; wherein the mass fraction of the heteropoly acid is 20-40%, the mass fraction of the amino resin carrier is 60-80%, and the specific surface area is 2-5m < 2 >/g; and the heteropoly acid is one of H3PW12O40, H4SiW12O40, H3PMo12O40 or H4SiMo12O40. The invention further discloses a preparation method of the catalyst. The heteropoly acid and the amino resin are chemically combined, so that