Contamination-resistant large-capacity macroporous weak-acid resin synthesis method

Abstract

The invention discloses a contamination-resistant large-capacity macroporous weak-acid resin synthesis method. The synthesis method comprises the steps that an acrylonitrile monomer, a divinyl benzene crosslinking agent, a pore-foaming agent and an initiator are adopted according to a certain proportion to prepare an oil phase, and water, a dispersing agent and NaCI are adopted to prepare a water phase in a polymerization kettle, then the oil phase is added to the water phase, heat release reaction occurs in the polymerization kettle, and the temperature of released heat is as high as 95 DEG C; cooling is performed with prepared saturated salt water, the temperature of the polymerization kettle is kept at 95 DEG C, then heating is performed to reach 100 DEG C, and heat-preservation distillation is performed; after temperature reduction, discharging, washing, drying, screening and cooling, contamination-resistant large-capacity acrylic acid type cation exchange resin white balls are obtained, the white balls are subjected to dissolving and swelling and then are mixed with 60 wt% sulphuric acid to perform hydrolysis reaction, heat preservation is performed for 10 hours, then discharging is performed, the discharge is washed with water to be neutral, alkali regulation is performed to reach pH = 12, and standing is performed for 2 hours; then, the discharge is washed with water to be neutral, acid regulation is performed to reach pH = 2, and standing is performed for 2 hours; the discharge is washed with pure water to be neutral and then is converted into sodium resin by using NaOH with the concentration of 30%, namely the contamination-resistant large-capacity macroporous weak-acid resin is obtained.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis in the sewage treatment industry, in particular to a method for synthesizing a pollution-resistant large-capacity macroporous weak-acid resin. Background technique [0002] When the weak acid adsorption resin is applied to sewage containing a large amount of background substances, such as humic acid, animal and vegetable oils, and petroleum, these substances will be adsorbed on the surface of the resin by the lipophilic framework of the resin, forming a layer of water-oil mixture, slowing down The rate at which metal ions in water diffuse into the resin prevents the ion concentration in the effluent from falling to the ppb level and causes irreversible pollution to the resin. [0003] The prior art provides many synthesis methods of weak acid resins to improve their performance. CN86101585A discloses a synthesis process of acrylic weak acid ion exchange resin. In order to solv...

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Problems solved by technology

[0006] However, the technical solutions disclosed in the above-mentioned patent applications all improve the resin performance only from the physical or chemical properties of the weak acid resin, and do not adjust the resin synthesis parameters for different water quality conditions to improve the application performance of the resin in a certain water quality