Ion exchange resin application notes

Views: 2     Author: Site Editor     Publish Time: 2010-01-02      Origin: Site

1) The storage and transportation
a) ion exchange resin should be stored at temperatures between 5-40 ℃. Ion exchange resin should be stored in
Sealed containers to avoid the cold or exposure. If the winter is not freezing facilities, resin can be stored in salt water, salt water, the concentration can be determined according to the temperature. Resin when cold, do not suddenly go to high-temperature environment, to put 5-10 ℃ low temperature environment, allowed to slowly thaw.
b) ion exchange resin contains a certain quantity of water in the storage and transport and the application process should be to maintain this
Points of water. If accidentally resin water loss, should with concentrated salt water (about 10%) soak, and then gradually diluted, not direct water to avoid rapid expansion of the broken resin.
c) resin in the long-term storage, the strong-type resin to be turned into salt, weak-type resin to be converted into hydrogen or swim
From the base type, and then soaked in clean water.
d) resin storage period of 2 years, more than 2 years re-examination before they can be used.
e) the use and storage and transportation process, prevent oil pollution of organic resin is.
2) pretreatment
Industrial production of ion exchange resins usually contain some excess solvent, oligomers and other impurities to be removed, otherwise it will affect the exchange effects and water quality, the new resin to prepare. Resin converted to the required ionic pretreatment can also improve its stability, and can play a role in activation of resin.
a) Yang resin pretreatment: the resin to flow with clean water after washing, soak 4-8 with 2-4% NaOH
Hours then washed with water to neutral, then 5% hydrochloric acid soaked 4-8 hours, washed with water to pH6, stand-by.
b) anion resin treatment: the resin to flow with clean water after washing with 5% hydrochloric acid soaked 4-8 hours
After washed with water to pH6, then 2-4% NaOH soaked 4-8 hours, washed with water to pH7-9, stand-by.
c) D301-Ⅲ, D301 pretreatment weak base resin: the resin with water for 4-8 hours, water
Wash to pH6, then 2-4% NaOH soaked 4-8 hours, washed with water to neutral, it is possible for secondary treatment and set aside.
d) for the pharmaceutical industry, food industry resin used, press the special requirements for processing.
e) the user can process design for different purposes, the resin converted to the required ionic.
3) ion exchange resin pollution, poisoning and activation:
Ion exchange resin suspended in the long-term use of sensitive material, colloidal material, organic matter, bacteria, algae, and iron and manganese pollution, to reduce or even lose their ion exchange capacity. Therefore, depending upon the circumstances of the resin irregular activation. Activation method can be based pollution, and conditions, and the general softening in the sun sensitive resin in the Fe3 + pollution, can be gradually diluted hydrochloric acid after soaking. Vulnerable to organic pollution anion resin can be used 10% NaCl +2-5% NaOH mixed solution soaking or leaching. Available when necessary, soaked in 1% hydrogen peroxide solution a few minutes, it can be used acids, alkalis alternate treatment, bleaching treatment, alcohol treatment method and the various sterilization processing.


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