1) column:
To feed processing in 1 ~ 4BV/hr flow rate through the exchange column, not the resin layer with bubbles (experimental exchange column requires resin filling height to diameter ratio of more than 3, in the production of resin filling suggestions about 2 meters height, the adsorption rate of 1-4BV/hr.). The leakage rate of the target product in the effluent is collected and detected continuously, and when the leakage exceeds the user's requirement, it is the end point of adsorption.
2) desorption:
With 1 ~ 2BV of distilled water to replace the resin layer of the liquid, according to the needs of different amount of distilled water can be used to wash the resin layer. Then, the organic solvent such as ethanol or methanol is passed through the resin layer at the speed of 1 to 2BV/hr, so as to elute the target product and collect the eluent.
3) regeneration:
After the desorption, the resin was washed with distilled water to no organic solvent, and then the resin layer was washed with 2-3 BV 4%NaOH solution at 1 ~ 2BV/hr flow rate, and finally washed with distilled water to neutral. It can be used for ethanol, methanol, acetone and so on.
Note: BV is twice the volume of resin.