Macroporous adsorption resin

     Macroporous adsorption resin is an artificially synthetic polymer adsorbent which has multi hole three dimension structures. It is a new type resin developed from application of ion exchange and other adsorbent. The principle of its wok is physical adsorption by way of the FanDenHua gravitation between itself and adsorbed molecules and through its huge ratio surface. It has very strong adsorbing ability to those molecules with similar structure such as aroma annular chemical compound. The process of using synthetic adsorption extraction make solvent to be reduced and safer than other adsorption.

      THE SPECIALITY   

     Macroporous adsorption resin has multi holes framework, and its speciality is similar to active charcoal but it can make up the storage of active charcoal because of the advantages as below:

1)  Its physical and chemical property is stabled, good mechanical intensity and used with long term.

2)  Regenerate easily, as usual it can make extraction in water, sparse acid, alkali or organic solvent such ethanol with low charcoal, acetone, and the matter extracted has low ashes.

3)  Many type, and it can change the structure of resin, polarity to fit many types of organic compound adsorption.

4)   As usual, the resin like a ball and the diameter is between 0.2-0.8mm. So it is more convenient for its hydro-resistance than active powder.

       Macroporous adsorption resin is type of intersectant polymer without ion exchange. It doesn’t dissolve in any acid, alkali, organic solvent and heated up because of intersectant solid structure. And make it high mechanical stabilization as its flexible structure, and high intersectant make it producing chemical. So when it is being in inclement condition, it has higher stabilization of physical and chemical property than gelable resin. The hot weightlessness temperature is 266℃. It has excellent heat-resistant and irradiate-resistant property, and its temperature is 150℃ or so for   polystyrene resin, it can endure 200℃-250℃ in short time. It mustn’t consider of inorganic salt, strong ion minimum-molecule compound for organic matter concentration. It has adsorption as FanDeHua gravitation and hydrogenolysis, and has filtration property as its multi holes structure and huge ratio surface, so it is a extraction material that is a compound adsorption and filtration property what is different from ion exchange resin. Its chemical structure has or hasn’t function radicel with different polarity.  It includes un-polarity, mid-polarity, polarity and strong polarity according to the surface property of resin.

       Un-polarity is made by minimum dipole distance without any function radicel, and it is very fit to adsorb un-polarity solvent for polarity solvent (such as water) as it high hydrophobe property on the surface. Mid-polarity is a type of resin containing ester radicel, has both hydrophobe and hydrophile on its surface, it can adsorb un-polarity matter from polarity solvent, it also can adsorb polarity matter from un-polarity matter. For polarity and strong polarity, that contain acyl, cyanogen and phenol what have nitrogen, oxygen, sulphur inside and etc, it is very fit polarity matter extraction by un-polarity matter system.

      Macroporous absorption resin:

     Specific property and usage of macroporous adsorption resin:　

(1) Water content of the resin is about 70%. It should be stored in a temperature over 0℃ in wet state. Avoid frozen breakage of ball body.

(2) Its physical chemical property is stabled. It does not dissolve in acid, alkali and organic solvent, indissolubility, hot weightlessness temperature 266℃.

(3) Before it is used the resin should be pre-treated accordingly depending on application purpose. That is to eliminate through infiltration the inertia solvent remains inside the resin holes. The pre-treatment method is to add as much ethanol as to a level 10cm above the resin layer in the extraction vessel and infiltrate 4hours before rinsed by ethanol. The rinse should be made to a extent that the flowed out liquid becomes non-cloudy when water diluted in test tube. Then wash it repeatedly by water to an extent that ethanol content less than 1% or there is no obvious ethanol smell. Then it can be used in productions. The medical grade resin of our factory has undergone deep treatment. So it can be used directly in productions.

(4) In production, we suggest fill in 2 meters high of resin, and make adsorbing flow speed 4-10 meters/h (1-4BV/h), methanol, acetone can desorption.

(5) Resin regenerate: after a period of using, the resin will become weak in its adsorbing ability and maybe contaminated. So it needs regenerate. The method is to add 3%-5% hydrochloric acid solution to a level 10cm above resin layer in the vessel and infiltrate for 2-4 hours, and then resin rinsed. Then use same density hydrochloric acid solution of the quantity 3-4 times that of resin to rinsed and then wash with clear water to an extent near neural. Then infiltrate with 3%-5% sodium hydroxide solution for 4 hours. Then rinse. Using same density sodium hydroxide solution of the quantity 3-4 times that of resin volume rinse. Finally wash with clear water approach to an extent that PH become neutral.