Preparation method of rare earth element modified and aldehyde removed resin and application of rare earth element modified and aldehyde removed resin in ethylene glycol refining

The invention relates to a preparation method of rare earth element modified and aldehyde removed resin and an application of the rare earth element modified and aldehyde removed resin in ethylene glycol refining. According to the preparation method, styrene is taken as a monomer, divinylbenzene is taken as a crosslinking agent, benzoyl peroxide is taken as an initiator, polyvinyl alcohol is taken as a suspending agent, water is taken as a reaction medium, and the components react in a suspension polymerization manner at the temperature of 85-95 DEG C; a polymer obtained after reaction is dissolved in dichloroethane for swelling, sulfuric acid is added for a sulfonation reaction, and cation exchange resin is obtained; and a nitric acid solution of the rare earth element is added into the cation exchange resin, and the rare earth element is chemically bonded to the resin to obtain the spherical modified and aldehyde removed resin. A fixed bed reactor is filled with the aldehyde removed resin, ethylene glycol is refined at the temperature of 60-70 DEG C, the density of a resin packing layer heap is 400-600 kg/m , the reaction pressure is 0.4 MPa, under the catalytic action of the modified and aldehyde removed resin, impurity aldehyde and ethylene glycol have a condensation polymerization reaction and produce a product that does not influence an ethylene glycol product, and obtained ethylene glycol has high purity.