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Adsorbent resin, also known as polymer adsorbent, is a kind of high molecular polymer which has the function of adsorption and concentrates and separates organic matter.  According to the surface properties of the resin, the adsorption resin is generally classified: non-polar adsorption resins which are obtained from a monomer polymer having a small dipole moment. A typical example of an adsorption resin having any functional group is an adsorption resin of a styrene-divinylbenzene system; a medium polarity adsorption resin means an ester-containing adsorption resin such as acrylate or methacrylate and dimethacrylate. A type of copolymer which is cross-linked; a polar adsorption resin refers to an  adsorption resin  containing a nitrogen, oxygen, sulfur polar functional group such as an amide group, a cyano group or a phenolic hydroxyl group.

The adsorption is mainly based on the principle of van der Waals force or hydrogen bonding to produce adsorption. Because the adsorption resin has a large pore structure, the adsorption resin also combines the principle of molecular sieve. The surface characteristics of the  adsorbent resin  determine the target that it can separate, generally following the following rules: Non-polar sorbents can adsorb non-polar materials from polar solvents Polar adsorbents can adsorb polar substances from non-polar solvents Medium polarity adsorbent combines both of these capabilities The main factors affecting adsorption;  1.The nature of the adsorbent, specific surface, particle size, polarity 2.The nature of the target, solubility, surface tension, molecular weight 3.Temperature; adsorption is an exothermic process, low temperature is good for adsorption, high temperature is good for analysis 4.The pH of the solution, which affects the degree of dissociation of the target 5. Salt...

The adsorption resin is mainly formed by suspension polymerization, and the pores are formed inside the resin through the addition of the porogen, followed by rinsing, sieving and the like. 1.Non-polar adsorbent resin Mainly use styrene and divinylbenzene as raw materials, choose the appropriate porogen and dosage. 2. Medium polarity adsorbent resin The acrylate monomer is mainly introduced into the non-polar adsorption resin, so that the resin structure has a certain polarity. 3. Polar adsorbent resin It mainly contains a polar group, a nitrile group, a sulfone group, an amide group, and an amino group. A.  adsorbent resin with Nitrile group Polymerization of acrylonitrile and divinylbenzene B.  adsorbent resin with Sulfone group It is a low crosslinked polystyrene sphere which is crosslinked by thionyl chloride. C.  adsorbent resin with Amide group The nitrile-containing  adsorption resin  is obtained by aminolysis of ethylenediamine; it can also be prepared b...