What’s the Role of Solvent Filter Played in Vacuum Filtration?

Vacuum filtration apparatus is mainly used in liquid chromatography mobile phase filtration, particle matter analysis, and microbial contamination detection. They are standing equipment in chemical laboratories. Use borate glass or 316L sanitary stainless steel as the material, which can filter various aqueous solutions, organics, and corrosive liquids in the analysis, and can be autoclaved at 121°C.

Hawach vacuum filtration apparatus includes vacuum filtration and vacuum pump. As an indispensable part of vacuum filtration, the solvent filter is a small device that removes a small number of solid particles in the liquid, which can protect the normal operation of the device. When the fluid enters the filter cartridge with a certain filter screen, its impurities are blocked, and the clean filtrate is discharged from the filter outlet. When cleaning is needed, just take out the detachable filter cartridge and reinstall it after treatment.

The solvent filter is suitable for the precision filtration of solids and liquids in grease, petrochemical, pharmaceutical, pesticide, paint, food and beverage, chemical fiber, and wastewater.

Three-Branches Vacuum Filtrations

Solvent filter operations

1. The solvent filter is fragile, so it must not be moved as a whole, especially with a clip.
2. The filter membrane must be qualified, and the unqualified ones will dissolve impurities. The solvent to be filtered can be soaked for 24 hours to see if there is any dissolution, so as to inspect the quality of the filter membrane.
3. The filter membrane is divided into organic and water systems, which should be distinguished.
4. For water filtration, organic membranes are used for organic membranes and then mixed after filtration. For the mixed mobile phase, the membrane of a higher ratio should be used.
5. The membrane does not matter anyway, but the smooth side is up, and the rough side is down.
6. Do not discard the waste filter membrane at will. The filter membrane pollutes the environment and should not be solved. Collect for unified processing.
7. When pumping air with the oil-free vacuum pump supporting the solvent filter, do not wait for the liquid to be empty before pulling out the hose. It is not suitable to pull out, it will squash the hose and stop the pump when there is a little liquid left.
8. The filtered solvent should avoid secondary pollution.

A solvent filter plays a crucial role in vacuum filtration systems, particularly when working with solvents or liquid samples. The primary functions of a solvent filter in vacuum filtration include:

  1. Contaminant Removal:
    • Solvent filters are designed to remove impurities, particulate matter, and contaminants from the solvent or liquid sample. This is essential for maintaining the quality and purity of the filtrate.
  2. Protection of Equipment:
    • Solvent filters act as a protective barrier for the vacuum pump and other filtration equipment. They prevent particles and debris from entering and potentially damaging the pump or clogging the filtration system.
  3. Enhanced Filtration Efficiency:
    • By removing impurities and particles from the solvent, a solvent filter helps maintain the efficiency of the filtration process. It prevents clogging of the filter membrane or other filtration media, ensuring a smooth and effective vacuum filtration.
  4. Prevention of Sample Contamination:
    • Solvent filters contribute to the prevention of sample contamination by ensuring that the solvent used in the filtration process is free from unwanted particles or impurities. This is especially important in sensitive analytical applications.
  5. Extended Equipment Lifespan:
    • Regular use of solvent filters helps extend the lifespan of the vacuum pump and other filtration components. By preventing the entry of contaminants, the wear and tear on the equipment are reduced, leading to longer-lasting and more reliable performance.
  6. Maintenance of Filtration System Integrity:
    • Solvent filters contribute to the overall integrity of the filtration system. They play a critical role in maintaining the cleanliness of the entire setup, including the filter flask, filter funnel, and other components.
  7. Improved Filtrate Quality:
    • The use of a solvent filter ensures that the filtrate collected is of high quality and free from unwanted particles. This is especially important in applications where the purity of the filtrate is critical, such as in analytical chemistry or sample preparation for sensitive assays.
  8. Selection for Compatibility:
    • Solvent filters are selected based on their compatibility with the solvents or liquids being used in the filtration process. Different filters may be recommended for different types of solvents to ensure optimal performance.

Notes on the use of solvent filter

1. The flow capacity of the filter should be greater than 2 times the flow during normal operation;
2. When selecting a filter, pay attention to the reasonable selection of the filter;
3. Taboo oil flows in both directions in the filter;
4. The precision of the suction filter should not be too high;
5. The filter set in the pipeline should have a blockage alarm device;
6. The flow capacity of the return oil filter cannot be simply selected according to the pump flow;
7. When using water glycol media, a special filter must be selected.

Solvent filter maintenance

1. When installing the filter, pay attention to the direction of liquid flow marked on the housing, and install it in the hydraulic system correctly;
2. When the filter pressure difference indicator shows a red signal, clean or replaces the filter in time;
3. The filter should be cleaned or replaced regularly, and external contaminants should be prevented from entering the working system during cleaning and replacement;
4. When the filter is cleaned, the port should be blocked to prevent the cleaned dirt from entering the inner cavity of the filter and causing internal pollution;
5. Solvent filter failures are generally due to clogging of the filter or deformation, bending, flattening, and breakdown of the filter, etc. The repair method is to clean or replace the filter.