Solvent-less cation resin preparation process
A preparation process and technology of cation resin, applied in cation exchange materials, ion exchange water/sewage treatment, etc., can solve problems such as poor deformation resistance, prolong reaction time, etc. Effect
Active Publication Date: 2012-08-22
NINGBO ZHENGGUANG RESIN CO LTD
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Problems solved by technology
[0006] 1.2 Insufficient reaction time: If dichloroethane is not added as an expansion agent, the reaction time needs to be extended to achieve the same number of functional groups (mass exchange capacity)
[0007] 1.3 Insufficient resistance to osmotic pressure: After the traditional styrene-divinylbenzene is polymerized, it is a rigid skeleton with poor deformation resistance
Method used
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Embodiment 1
[0025] Embodiment 1: with reference to attached Figure 1-4 . Solvent-free cationic resin polymerization process: 1) White ball polymerization: After mixing liquid monomers such as styrene and divinylbenzene, add them to the water phase with dispersant to polymerize into spherical particles, after curing, wash, dry and sieve for later use ,See figure 1 . 2) Functional group sulfonation reaction: Polystyrene white balls react with refined and purified sulfuric acid under the condition of no solvent swelling, so as to introduce sulfonic acid groups into the skeleton, and then gradually dilute to synthesize cationic resin, see figure 2. Raw material ratio: white ball: sulfuric acid (95%) = 1:7 (weight ratio). Reaction process: After throwing white balls and sulfuric acid, raise the temperature to 85°C at a constant speed, keep it warm for 1 hour, raise the temperature to 100°C at a constant speed, then raise the temperature to 130°C at a constant speed, keep it warm for 5 h...
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The invention relates to a solvent-less cation resin preparation process, which is capable of effectively realizing advanced purification of ion exchange resin industrial products to obtain 'food-grade water treated solvent-less cation resin', and capable of replacing the conventional synthesis method utilizing solvent, controlling intrusion of toxic substance from sources and preventing adverse effect of residual solvent to human bodies. The solvent-less cation resin preparation process includes steps of white ball polymerization, functional group sulfonation reaction and solvent-less resin refining. 2-5% of ethylene glycol dimethacrylate (EGDMA) cross linking agent is added to the step of white ball polymerization. Polystyrene white balls react with sulfuric acid refined and purified without swelling of solvent, sulfonic acid groups are transferred on a frame, and then cation resin is synthetized after diluting step by step during the functional group sulfonation reaction. During solvent-less cation resin refining, cation resin which is transformed to be sodium-type and sulfonated is heated to be 95 DEG C by steam so as to be digested for 2 hours, and sulfonated dissolved residues are removed after repeating the last step three times.
Description
technical field [0001] The invention relates to a method that can not only effectively purify and deep-treat ion exchange resin industrial products, realize "food-grade water treatment solvent-free cation resin", but also replace the traditional solvent-based synthesis method, and control the entry of toxic substances from the source The invention relates to a solvent-free cation resin preparation process for avoiding harmful effects of residual solvents on the human body, and belongs to the field of cation resin preparation process. Background technique [0002] At present, with the development of the drinking water industry, it is necessary to soften high-hardness water, remove heavy metal ions from heavy metal-polluted water, and remove harmful substances such as nitrate, fluoride, and arsenic in water. These are imperative, otherwise it will affect to people's health. Most of these drinking water treatments are done with ion exchange resins. In addition, according to t...
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Login to View More IPC IPC(8): B01J39/20C02F1/42C08F212/08C08F8/36
Inventor 汪国周沈建华
Owner NINGBO ZHENGGUANG RESIN CO LTD