Ion-exchange resins contain a certain amount of water and should not be stored in the open air. They should be kept wet during storage and transportation to avoid dehydration damage. If the resin is dehydrated during the storage process, it should be soaked in concentrated brine (10%) and then diluted gradually. Do not directly enter the water to avoid the rapid expansion of the resin and rupture.
The ion exchange resin should be protected from freezing and heat when stored. Storage temperature should be maintained at 5-40ºC as far as possible, never lower than 0ºC, to prevent resin particles from cracking due to condensation of water inside the resin.
If there are no insulation measures in winter, the resin can be stored in salt water, which concentration can be determined according to the temperature.
Resin in the storage and use process, to prevent contact with metal, rust, oil, strong oxidant, otherwise it will reduce the resin exchange capacity, or even lose function.
Ion exchange resins should be stored separately and marked to distinguish them. Storage should be in their most stable form. Strong base anionic resin should be chlorine type; Strong acid cationic resin should be sodium type; Weak base anionic resin should be free amine type. The weak acid type cationic resin shall be of hydrogen type.
Notes for resin using
Resin is best not to use direct contact with the hand, to prevent skin allergy, if direct contact with the hand, need to clean with water, in case of accidental ingestion, should immediately go to the hospital for treatment.
Acids and other strong oxidants cause reactions when mixed with resins. If oxidants such as acids are considered, the process equipment must be properly designed to prevent rapid pressure increases.
Under certain conditions, oxidizing agents, such as nitric acid, can attack organic ion-exchange resins. This effect causes degradation of the resin and even violent exothermic reactions (such as explosions). Consult a technician or experienced person before using it.
After resin saturation, the resin is recycled in time. After regeneration, clean it with clean water and avoid soaking. It is best to wash the resin regularly to effectively remove impurities on the surface of the resin.
When the resin needs to be replaced, the waste resin cannot be arbitrarily treated, to put the resin into a container, to the professional unit for treatment, to prevent environmental pollution.
Notes for resin regeneration
The method used for resin regeneration is very important, which affects the regeneration and exchange capacity of resin. General resins can be used for downstream regeneration, and special resins can be used for counter-current regeneration.
Acidic and alkaline regenerated solutions are corrosive and should be treated in a manner that prevents contact with eyes and skin.
The selection of regenerating agent should avoid containing a great quantity of iron ions, otherwise it will cause pollution to the resin.
After the regeneration of the resin needs to be tested, must meet the water production standards can be put into use. Before use to ensure that there is no residue of chemical substances used in the regeneration of the resin tank.