Organic-Pollution-Resistant Ion Exchange Resin and Preparation Method and Application Thereof

摘要

Implementations herein relate to a method for preparing organic-pollution-resistant ion exchange resins and application thereof. The method includes adding modified inorganic particles to prepare novel ion exchange resins containing inorganic particles modified by a parcel modifier. A weight ratio between the monomer of the ion exchange resins and the modified inorganic particles is about 0.1% to 30%. The method may increase moisture content of the resins 3 to 30% such as to improve the structures of the resins, and therefore increase the regeneration efficiency 0.4 to 70%, as compared to conventions resins. The method improves resistance of resins to organic pollution, increases regeneration efficiency, and extends service life of the resins. In the process of water treatment, the ion exchange resin of the implementations may be regenerated with long-term stability. In addition to securing the water treatment efficiency, the method may avoid frequent replacement operations and lower the costs.

主权项

1. A method for preparing organic-pollution-resistant ion exchange resins, the method comprising:
(1) mixing a monomer, a crosslinking agent, and an initiator to obtain an oil phase, wherein a weight ratio between the monomer and the crosslinking agent is about 1:0.02 to 0.45, a weight ratio between the monomer and the initiator is about 1:0.003 to 0.15, and the monomer includes at least one of acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, butyl methacrylate, acrylonitrile, glycidyl methacrylate, styrene, p-chlorostyrene, divinylbenzene, nitrostyrene, dichloro styrene, methyl styrene polychloroprene, methyl cellulose, carboxymethyl cellulose, sodium alginate, chitosan or derivatives thereof; (2) adding 0.2 to 3% by weight of a dispersant to a water phase, wherein a weight ratio between the water phase and the oil phase is about 1:0.4 to 1, and the dispersant includes at least one of polyvinyl alcohol, gelatin, starch, methyl cellulose and derivatives thereof, calcium carbonate, calcium phosphate, talc, diatomaceous earth, bentonite, salt, or silicate; (3) adding inorganic particles to a methanol solution to obtain a mixture, stirring the mixture at 20° C. to 90° C. with 30 to 250 rpm for 0.5 h to 4h, adding a modifier to the mixture and stirring the mixture for 0.5 h to 10 h, and drying the mixture to obtain modified inorganic particles, wherein a weight ratio between the inorganic particles and the methanol solution is about 1:3 to 10, and a weight ratio between the modifier and the inorganic particles is about 1:0.05 to 5; (4) adding the modified inorganic particles to the water phase, the oil phase, or a suspension polymerization system of the water phase and the oil phase, wherein a weight ratio between the modified inorganic particles and the monomer is about 0.1% to 30%; and (5) adding the oil phase to the stirred water phase, raising the temperature to 75 to 95° C. and keeping the temperature for about 1 to 15 hours, and separating resins from the suspension polymerization system after cooling, and drying the resins after extraction or washing, wherein the stirring speed is about 100 to 1500 rpm, a temperature is about 50 to 80° C., and a duration of polymerization is about 2 to 8 hours, steps (1), (2), and (3) are adjustable, step 4 is performed prior to step 5.