Water-absorbent resin composition, absorbent material and absorbent article
US-2024424473-A1 · Dec 26, 2024 · US
Method of cleaning resins
US10967367B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10967367-B2 |
| Application number | US-201716478166-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 10, 2017 |
| Priority date | Feb 10, 2017 |
| Publication date | Apr 6, 2021 |
| Grant date | Apr 6, 2021 |
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Abstract
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Provided is a method of cleaning a collection of resin beads, wherein the method comprises bringing the collection of resin beads into contact with an aqueous solution, wherein the aqueous solution comprises one or more dissolved amine compounds, wherein the collection of resin beads comprises polymer that comprises attached carboxylic acid groups or sulfonic acid groups or a mixture thereof.
First claim
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The invention claimed is: 1. A method of cleaning a collection of resin beads, wherein the method comprises bringing the collection of resin beads into contact with an aqueous solution, wherein the aqueous solution comprises one or more dissolved amine compounds, wherein the collection of resin beads comprises polymer that comprises attached carboxylic acid groups or sulfonic acid groups or a mixture thereof. 2. The method of claim 1 , wherein the amine compound has the structure (I) wherein R 1 is an organic group comprising 1 to 30 carbon atoms; wherein each of R 2 and R 3 is independently either hydrogen or an organic group comprising 1 to 30 carbon atoms. 3. The method of claim 2 , wherein R 1 additionally comprises one or more atom of oxygen, one or more atom of nitrogen, or a combination thereof. 4. The method of claim 1 , wherein the amine compound is present in the aqueous solution at a concentration of 0.1% to 6% by weight based on the weight of the aqueous solution. 5. The method of claim 1 , wherein the amine compound has a pKa of the conjugate acid of 6 to 10. 6. The method of claim 1 , wherein the polymer comprises attached sulfonic acid groups. 7. The method of claim 1 , wherein the collection of resin beads comprises gel resin beads.
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- What does patent US10967367B2 cover?
- Provided is a method of cleaning a collection of resin beads, wherein the method comprises bringing the collection of resin beads into contact with an aqueous solution, wherein the aqueous solution comprises one or more dissolved amine compounds, wherein the collection of resin beads comprises polymer that comprises attached carboxylic acid groups or sulfonic acid groups or a mixture thereof.
- Who is the assignee on this patent?
- Dow Global Technologies Llc, Ddp Specialty Electronic Materials Us Llc
- What technology area does this patent fall under?
- Primary CPC classification B01J20/26. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 06 2021 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).