Invention Grant
- Patent Title: Desalination performance restoration agent for cellulose acetate membrane and desalination performance restoration method for cellulose acetate membrane
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Application No.: US17633758Application Date: 2020-10-20
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Publication No.: US12036513B2Publication Date: 2024-07-16
- Inventor: Takayoshi Hori , Katsunori Matsui , Sho Yokogawa , Yoshiaki Ito , Ryo Kamito , Yoshihisa Katsunishi , Atsuyoshi Ueda , Takahiro Masui
- Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD. , KYOEISHA CHEMICAL CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.,KYOEISHA CHEMICAL CO., LTD.
- Current Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.,KYOEISHA CHEMICAL CO., LTD.
- Current Assignee Address: JP Tokyo; JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP 19193701 2019.10.24
- International Application: PCT/JP2020/039353 2020.10.20
- International Announcement: WO2021/079867A 2021.04.29
- Date entered country: 2022-07-13
- Main IPC: B01D65/06
- IPC: B01D65/06 ; B01D67/00 ; B01D69/12 ; B01D71/16
Abstract:
A desalination performance restoration agent for a cellulose acetate membrane contains: a solvent; and a modified polyvinyl alcohol mixed in the solvent. The modified polyvinyl alcohol has an acetyl group structure in at least part of polyvinyl alcohol.
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