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Introduction of ion exchange resin

Jun 01, 2020

Pudding ion exchange resin

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Overview description, properties, functions and uses: that is, a kind of composite resin (Composite IER). In order to make the fine particle resin can be applied in the general ion exchange technology, the two fine particle ion exchange resins can be embedded in a matrix that can permeate water and salt according to the required ratio, so that the overall particles still have the normal size. Such composite resins can be made from finely ground commercial ion exchange resins, so-called raisin-pudding resins. For example, anionic and cation fine powder resins are embedded in hydrophilic polymers such as cellulose, polysalts or polyvinyl alcohol cross-linked with dialdehyde. Because the matrix particles have a standard ion exchange resin particle size, the operation is very convenient.


Powder ion exchange resin


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General description, properties, functions and uses: refers to ion exchange resins with irregular fine powder (200 mesh or more) appearance. Generally, the fine powder resin can be directly prepared by the emulsion polymerization method, or it can be mechanically crushed and sieved by the spherical resin. This kind of resin is used in special occasions, and this powdery resin can be used as a filter (plate) in the treatment of condensed water. At present, a large amount of powdery ion exchange resins are mainly used to manufacture heterogeneous ion exchange membranes. That is, 60% to 70% of resin powder is mixed with 30% to 40% of high-pressure polyethylene particles and added with polyisobutylene and calcium stearate, kneaded into a sheet on a hot roller, and then with nylon mesh on the press Hot-pressed into finished ionic membrane.


Monofunctional exchange group ion exchange resin


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General description, properties, functions and uses refer to the general term for various ion exchange resins that contain only a single type of exchange group on the cross-linked structure or non-cross-linked structure body of the ion exchange resin. Such as commonly used sulfonic acid type positive resin, carboxylic acid type positive resin, quaternary ammonium type negative resin, etc.


Application of macroporous ion exchange resin


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General description, properties, functions and uses: Sometimes it is also commonly known as macroreticular ion ex-change resin. It is a resin with a macroporous network three-dimensional structure and with exchange groups. This type of resin is generally made by a polymerization synthesis process with porogen or inert filler. It is different from the gel-type resin. The pellet has a capillary structure inside. The appearance is opaque. It has compressive elasticity and mechanical strength. Its anti-pollution performance is better than that of the gel-type resin. Used in various industrial fields.


Phenolic polyamine ion exchange resin


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General description, properties, functions and uses: It is an early development of ion exchange resin varieties. For example, adding polyamines such as tetraethylenepentamine during the condensation of phenol and formaldehyde can produce anion exchange resins. Since its comprehensive performance is not as good as the anion exchange resin synthesized with styrene-divinylbenzene as the skeleton material, this kind of resin is now rarely used.


Large mesh ion exchange resin


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General description, properties, functions and uses: a resin with a large network structure. It is a kind of functional polymer formed by introducing functional groups after synthesizing macroporous adsorbent with inert polymer as matrix. The parent group connecting functional groups is called a polymer carrier, and most of them are synthetic polymers or polymers easily available, such as polystyrene, polyacrylamide gelatin, dextran, cellulose, etc. During the preparation, first add inert porogens (such as alcohols, alkanes, etc.) to the polymer raw materials. After the network skeleton is cured, the porogens are dissolved out with organic solvents, etc., and the pore size can reach more than 100nm The large pores are then activated by chemical reactions and attached to the support. The main characteristics of this type of resin are good physical and chemical stability and large exchange capacity, which is especially suitable for the separation of polymer materials. For example, a resin obtained by copolymerizing a vinyl compound (such as methacrylic acid, styrene, etc.) monomer and a long-chain divinyl compound as a cross-linking agent. Important types of cross-linking agents are: When this type of resin swells, the cross-linking bridge opens a considerable distance, which easily causes organic ions to diffuse in the pores, thus having good permeability to large ions. Since the crosslinking agent contains unstable amide groups and ester groups, the chemical stability is poor.

Source´╝Ühttp://www.up-resin.com/


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