Filtration method and device using porous glass membrane having uniform pore distribution

摘要

PROBLEM TO BE SOLVED: To provide a method for fractionating and collecting fine particle dispersion of desired fine particle size distribution from particle dispersion stock liquid, and a device therefor.SOLUTION: According to this method, it is more important than anything else that back washing operation is periodically performed during filtration operation in order to realize filtration work over an extended period, and re-opening of a pore is performed. Further, it is more important than anything else that a porous membrane having a uniform pore size distribution rather than a porous membrane having an abundant porosity is used in order to exhibit effect of said back washing.SELECTED DRAWING: Figure 1