Solvent filterCleaning method:
After a period of use, the titanium rod filter cartridge will experience a certain degree of blockage, resulting in a decrease in flow rate and an increase in pressure at the front end of the filter, such as from below 0.22mPa to above 0.3mPa. At this point, the filter cartridge needs to be cleaned using the following methods:
For newly used filter cartridges, the method of backwashing with clean water and blowing back with gas is generally used for cleaning, that is, using water slightly higher than the working pressure (such as 0.3mPa) to inject water in the opposite direction for cleaning. The recoil time is about 1-3 minutes.
When the filtration effect does not significantly improve after multiple backwashs, a hydrochloric acid solution of less than 5%, sulfuric acid solution of less than 8%, or NaOH solution of less than 10% can be used to soak at room temperature and then rinse with clean water.
The specific choice of acid washing or alkali washing should be based on whether impurities in the filtrate are easily soluble in acid or alkali.
Solvent filterWhat should be noted when using
1. Solvent filters are fragile items and should not be moved as a whole, especially with clamps
2. The selection of filter membrane should choose qualified products. Unqualified ones will dissolve impurities. You can soak them in the solvent to be filtered for 24 hours to see if there is any dissolution phenomenon, in order to examine the quality of the filter membrane.
3. Filter membranes are divided into organic and aqueous types, and should be distinguished.
4. For water filtration, organic membranes are used for organic filtration. After filtration, the mixture is mixed, and the proportion of the mixed mobile phase is determined by which membrane is used.
5. The membrane does not separate, but the smooth side facing upwards and the coarse side facing downwards will have better filtration effect.
6. Do not dispose of discarded filter membranes casually, as they can pollute the environment and are not suitable for degradation. Collect and handle uniformly.
7. When the oil-free vacuum pump that comes with the solvent filter is used for pumping, do not wait until the liquid is empty before pulling out the hose. It is not advisable to pull out the hose as it may flatten the hose and stop the pump when there is still some liquid left.
8. The filtered solvent should avoid secondary pollution.
Solvent filter