Membrane filtration is a separation technology that can achieve molecular-level filtration. It is a technology that uses the selective permeability of membrane pores to achieve two-phase separation. Using the pressure difference at both ends of the membrane as the driving force, solvents, inorganic ions, small molecules, etc. pass through the membrane, while particles and large molecules are retained.
Membrane technology is beginning to be frequently used in various equipment, especially in equipment such as gas-liquid filter screens.
Ultrafiltration refers to the process where, under certain pressure, a solution containing small molecules passes through the supported membrane surface. The solvent and small molecule solute between them will pass through the membrane, while the large molecules are intercepted and recovered as a concentrate. Hyden ultrafiltration membrane filtration has a particle size range of 5-10 nm, and the operating pressure is between 0.1-0.25 MPa.