FILTRATION METHOD WITH USE OF POROUS GLASS MEMBRANE HAVING UNIFORM PORE DISTRIBUTION AND DEVICE THEREFOR

• Main Authors: ITOHIRA SHUNICHI, MAEDA DAIGO, FUJIWARA MITSUTERU
• Format: Patent
• Language: English; Japanese
• Published: 06.04.2017
• Subjects: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING

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 【課題】 微粒子分散原液から所望の微粒子径分布の微粒子分散液を分画して分取する方法とその装置を提供する。【解決手段】 本発明の方法によれば、長時間ろ過作業を実現させるために、ろ過作業中に定期的に逆洗作業を施し、細孔の再開通を行うことが何よりも重要であり、その逆洗の功を奏するためにも、気孔率の豊富な当該多孔質膜を用いることよりも、細孔径分布が均一である多孔質膜を用いることが何よりも重要であるということを特徴とする。【選択図】図１