• 专利标题:   Porous polymeric membrane useful for removing impurities from liquid compositions e.g. alcohols and ammonium hydroxide comprises a polymer having mixed in it a carbonaceous material.
  • 专利号:   WO2022212412-A1, CN115138222-A, US2022323912-A1, TW202304591-A
  • 发明人:   MIR A A, JABER J A, PATEL R B, BOUDREAU A, KALYANI V
  • 专利权人:   ENTEGRIS INC, ENTEGRIS INC
  • 国际专利分类:   B01D063/14, B01D065/10, B01D069/12, B01D071/02, B01D071/36, B01D071/68, C02F001/44, B01D061/00, B01D061/58, B01D063/02, B01D063/06, B01D063/08, B01D063/10, B01D069/02, B01D069/08, B01D071/10, B01D071/12, B01D071/28, B01D071/30, B01D071/38, B01D071/48, B01D071/50, B01D071/52, B01D071/56, B01D071/64, B01D061/14, B01D067/00, B01D069/14, B01D071/44, B01D071/26
  • 专利详细信息:   WO2022212412-A1 06 Oct 2022 B01D-069/12 202287 Pages: 41 English
  • 申请详细信息:   WO2022212412-A1 WOUS022397 29 Mar 2022
  • 优先权号:   US168137P, US707756

▎ 摘  要

NOVELTY - Porous polymeric membrane comprises a polymer having mixed in it 0-80 wt.% carbonaceous material, where the membrane exhibits (a) a bubble point of 2-200 psi when measured using ethoxy-nonafluorobutane HFE 7200 at 22° C, (b) an isopropanol flow time of 20-10000 seconds/500 ml when measured at 14.2 psi, and (c) a G25 particle retention of 25-100%. The carbonaceous material comprises activated carbon, carbon black, carbon nanotubes, or graphene. The polymer comprises polyamides, polyimides, polyolefins, polyether-sulfones, poly acrylates, polyesters, celluloses, cellulose esters, polycarbonates, poly(phenylene oxide), poly(styrene), and/or halogenated polymers. USE - The porous polymeric membrane is useful in a filter for removing impurities from liquid compositions, e.g. alcohols and ammonium hydroxide e.g. aqueous ammonia. ADVANTAGE - The membrane is capable of removing trace amounts of certain amines and metal cations from such solutions. It provides liquid solutions of alcohols, e.g. 1-4C alkanols, and ammonium hydroxide of extremely high purity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: filter comprising the porous polymeric membrane; composite membrane; preparing a porous polymeric membrane; removing impurities from a liquid composition; and purified liquid composition.