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US 10,589,232 B2Granted
Forward osmosis membrane and forward osmosis treatment system
AssigneesAsahi Kasei Kabushiki Kaisha, National University Corporation Kobe University
InventorsToru Morita, Masayuki Kaneda, Masahiro Yasukawa, Hideto Matsuyama
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Abstract
A forward osmosis membrane characterized in that a thin membrane layer having the performance of a semi-permeable membrane is laminated on a polyketone support layer.
Claims15
A forward osmosis membrane comprising a thin membrane layer exhibiting semi-permeable membrane performance laminated on a polyketone support layer,
- wherein the thin membrane layer is a polyamide thin membrane layer,
- wherein the polyketone support layer includes a polyketone which is a copolymer of carbon monoxide and one or more olefins, and a proportion of oxotrimethylene repeating units among repeating units of the polyketone is 70 mol % or greater,
- the polyketone support layer has pores with a maximum pore size of 50 nm or greater and no greater than 2 μm as measured by the bubble point method,
- the porosity of the polyketone support layer is 70% or greater, and
- the polyketone support layer is a flat membrane polyketone support layer having a thickness of no greater than 200 μm or a hollow fiber polyketone support layer having a thickness of 10 to 200 μm.
2 more elements
Dependencies are inferred from the claim text.