Highly selective alicyclic polyamide nanofiltration membrane and making method thereof

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United States of America Patent

PATENT NO 10780401
APP PUB NO 20180326362A1
SERIAL NO

16033413

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Abstract

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The present invention discloses a highly selective alicyclic polyamide nanofiltration membrane and a making method thereof. The method comprises the following steps: alternately and uniformly coating at least an alicyclic acid chloride solution and at least an alicyclic amine solution on a porous support membrane, using a spin coating method or a soaking method, to form at least one layer of the alicyclic polyamide nanofiltration membrane. Preferred embodiments exhibit improved ion selectivity, e.g. increased water flux, enhanced divalent/monovalent rejection selectivity, reduced fouling and improved divalent rejection rate (Ca2+, Mg2+) compared to the traditional aromatic-alicyclic mixed-structure polyamide nanofiltration membrane and/or the whole aromatic polyamide nanofiltration membrane. Therefore, the alicyclic polyamide nanofiltration membranes made in the present invention has great application prospect in the fields of zero-liquid discharge of industrial wastewater, water softening, and produce water treatment, etc.

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Patent Owner(s)

  • CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Peng Qingdao, CN 819 7716
Niu, Qingshan Jason Qingdao, CN 10 53
Sun, Haixiang Qingdao, CN 2 7
Yuan, Bingbing Qingdao, CN 2 7
Yuan, Tao Qingdao, CN 27 90

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