Method for producing polysaccharide derivative and lignin derivative
US-10323101-B2 · Jun 18, 2019 · US
Polysaccharide derivative production method and lignin derivative production method
US12304973B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12304973-B2 |
| Application number | US-202017430162-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 5, 2020 |
| Priority date | Mar 8, 2019 |
| Publication date | May 20, 2025 |
| Grant date | May 20, 2025 |
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Abstract
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An object of the present invention is to provide a method for producing a polysaccharide derivative in which the use of a reagent such as an acid catalyst is not needed and a reaction can be smoothly progressed without causing any side reactions. A method for producing a polysaccharide derivative of the present invention includes a step of dissolving a raw material including a polysaccharide in at least one ionic liquid having an anion which is a non-carboxylate anion and reacting the raw material with an acyl group donor, a conjugate acid of the anion having a pKa of 4 or higher in vacuum.
First claim
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The invention claimed is: 1. A method for producing a polysaccharide derivative comprising: dissolving a raw material comprising a polysaccharide in an ionic liquid having an anion which is a non-carboxylate anion, wherein a conjugate acid of the non-carboxylate anion has a pKa of 4 or higher in vacuum, and reacting the raw material with an acyl group donor, wherein the anion is selected from the group consisting of a substituted or unsubstituted phenolate, a substituted or unsubstituted pyridinolate, a substituted or unsubstituted pyrimidinolate, a substituted or unsubstituted 2,6-dioxo-1,2,3,6-tetrahydropurin-7-ide, and a substituted or unsubstituted imidazol-1-ide. 2. The method according to claim 1 , wherein the anion is selected from the group consisting of the following formulae: 3. The method according to claim 1 , wherein the polysaccharide is cellulose. 4. The method according to claim 1 , wherein the acyl group donor is a chain or cyclic ester, an aldehyde, a carboxylic acid halide or a carboxylic acid anhydride.
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- What does patent US12304973B2 cover?
- An object of the present invention is to provide a method for producing a polysaccharide derivative in which the use of a reagent such as an acid catalyst is not needed and a reaction can be smoothly progressed without causing any side reactions. A method for producing a polysaccharide derivative of the present invention includes a step of dissolving a raw material including a polysaccharide in…
- Who is the assignee on this patent?
- Univ Nat Corp Kanazawa
- What technology area does this patent fall under?
- Primary CPC classification C08B3/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 20 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).