Forward Osmosis Separation Processes
US-2016340212-A1 · Nov 24, 2016 · US
Draw solute, draw solution, and water treatment device
US12434190B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12434190-B2 |
| Application number | US-202117916931-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 7, 2021 |
| Priority date | Apr 8, 2020 |
| Publication date | Oct 7, 2025 |
| Grant date | Oct 7, 2025 |
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Abstract
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A draw solute for the forward osmosis membrane process comprises a random copolymer obtainable by random addition of a monomer containing ethylene oxide and butylene oxide to a compound having one or more hydroxyl groups.
First claim
Opening claim text (preview).
The invention claimed is: 1. A draw solute for the forward osmosis membrane process, the draw solute comprising a random copolymer obtainable by random addition of a monomer containing ethylene oxide and butylene oxide to a compound having two or more hydroxyl groups, wherein a molar ratio of ethylene oxide to butylene oxide is 2.5:1 to 5:1. 2. The draw solute according to claim 1 , wherein the random copolymer has a number average molecular weight of 500 to 10000. 3. The draw solute according to claim 1 , wherein a cloud point of a 50% by mass draw solution prepared by dissolving the draw solute in water is 40 to 75° C. 4. The draw solute according to claim 2 , wherein a cloud point of a 50% by mass draw solution prepared by dissolving the draw solute in water is 40 to 75° C. 5. The draw solute according to claim 1 , wherein the random copolymer is obtainable by random addition of the monomer containing ethylene oxide and butylene oxide to a compound having three or more hydroxyl groups. 6. The draw solute according to claim 1 , wherein the draw solute is dissolved in water to prepare a 5% by mass aqueous solution, the pH of the aqueous solution is 2 to 6. 7. The draw solute according to claim 1 , comprising antioxidant in an amount of 50 ppm by mass or more and 1000 ppm by mass or less. 8. The draw solute according to claim 1 , wherein a content of the monomers other than ethylene oxide and butylene oxide is 20 mol % or less. 9. The draw solute according to claim 1 , wherein a mass ratio of a structural unit derived from the hydroxyl group-containing compound to a structural unit derived from ethylene oxide and butylene oxide is 1 or more and 110 or less. 10. The draw solute according to claim 1 , wherein said draw solute has a water transport capacity of 52% or more. 11. The draw solute according to claim 1 , wherein a molar ratio of ethylene oxide to butylene oxide is 2.8:1 to 4.5:1. 12. A draw solution comprising the draw solute according to claim 1 . 13. A water treatment equipment using the draw solution according to claim 12 . 14. A draw solution comprising the draw solute according to claim 2 . 15. A draw solution comprising the draw solute according to claim 3 . 16. A draw solution comprising the draw solute according to claim 4 .
Assignees
Inventors
Classifications
Saturated oxiranes · CPC title
by forward osmosis · CPC title
Ethylene oxide or propylene oxide copolymers, e.g. pluronics · CPC title
containing hydroxyl groups · CPC title
containing aliphatic hydroxyl groups · CPC title
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Frequently asked questions
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- What does patent US12434190B2 cover?
- A draw solute for the forward osmosis membrane process comprises a random copolymer obtainable by random addition of a monomer containing ethylene oxide and butylene oxide to a compound having one or more hydroxyl groups.
- Who is the assignee on this patent?
- Nippon Catalytic Chem Ind, Trevi Systems Inc
- What technology area does this patent fall under?
- Primary CPC classification B01D61/005. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 07 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).