What resin is adsorption resin?

Recently, many users have asked what resin is the adsorption resin this problem, in fact, the adsorption resin refers to a class of polymer, the appearance is generally a diameter of 0.3 ~ 1.0mm small ball, it is a new development in the polymer field in recent years, a porous resin, often used in wastewater treatment, pharmaceutical separation and purification.
What is adsorption resin?
Adsorbent resin refers to a class of high molecular polymers that can be used to remove organic matter from wastewater, decolorization of sugar solution, separation and refining of natural products and biochemical products. There are many kinds of adsorbed resins, and the changes of monomers and functional groups on monomers can give the resin various special properties. Commonly used are polystyrene resin and polyacrylate resin and other high polymer. Adsorption resin is a resin adsorbent characterized by adsorption and has a porous three-dimensional structure. It is a new porous resin developed in the field of polymers in recent years, by styrene and styrene monomers, in the presence of organic solvents such as toluene, through suspension copolymerization of small balls like fish seed.
What are the characteristics of adsorbed resins?
Comfortable stability good renewable reuse, saving expenses; The adsorption effect is good, and the analytes can be reused after analysis, especially heavy metals; Simple process, convenient operation, low cost: wide range of application is less affected by external conditions, the separation and extraction of natural products, adsorption resin separation, boiling liquid directly on the column, do not need to concentrate, after the adsorption is finished with dilute alcohol elution, eluent after concentration, drying, you can obtain high purity, non-moisture absorption products; At the same time, the adsorption technology has the advantages of simple equipment, convenient operation, short production cycle, low energy consumption and cost, and can be formed without auxiliary materials.
Structure of adsorbed resin:
The appearance of the adsorption resin is generally a small ball with a diameter of 0.3 ~ 1.0mm, the surface is smooth, and it can be milky white, light yellow or dark brown according to the variety and performance. The size of adsorbed resin particles has a great influence on the properties. The smaller and more uniform the particle size, the better the adsorption performance of the resin. However, the particle size is too small, the resistance to the fluid is too large when used, the filtration is difficult, and it is easy to lose. The adsorption resin with uniform particle size is difficult to achieve in production, so the adsorption resin generally has a wide particle size distribution at present.
The adsorbent resin feels hard and has a high strength. The density is slightly greater than that of water, and there is a certain swelling in organic solvents. But it shrinks again after drying. And often the larger the swelling, the more severe the shrinkage after drying. In order to avoid excessive swelling of the adsorbent resin, ethanol, methanol, etc. with small swelling of the adsorbent resin are often replaced and then transferred to water. The adsorbed resin must be stored under conditions of water, so as not to shrink the resin and make the pore size smaller. Therefore, adsorbent resins are generally sold with water.
The internal structure of adsorbed resin is very complicated. It can be observed under a scanning electron microscope. The inside of the resin is like a bunch of grape microspheres, the size of the grape beads is in the range of 0.06 ~ 0.5μm, and there are many gaps between the grape beads. This is actually a hole in the resin. Studies have shown that there are still many tiny pores inside the grape balls. The adhesion between grape beads forms a macroscopically spherical resin. It is this porous structure that gives the resin excellent adsorption properties, so it is the key technology in the preparation and property research of adsorbed resin.
Application fields of adsorption resin:
It is widely used in wastewater treatment, chemical separation and purification, as the carrier of chemical reaction catalyst, gas chromatography analysis and the packing of gel permeation chromatography molecular weight classification column. It is characterized by easy regeneration and can be used repeatedly. If combined with negative, cation exchange resin, can achieve a very high level of separation and purification.