Method for preparation of cellulose nanocrystals and nanofibrils
US-2017101738-A1 · Apr 13, 2017 · US
Method for producing cellulose nanofibers
US11713360B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11713360-B2 |
| Application number | US-201816607870-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 1, 2018 |
| Priority date | Jun 16, 2017 |
| Publication date | Aug 1, 2023 |
| Grant date | Aug 1, 2023 |
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Abstract
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An object of the present invention is to provide an efficient method for producing cellulose nanofibers, without N-oxyl compounds such as TEMPO remaining in the cellulose nanofibers. Provided is a method for producing cellulose nanofibers, the method including: oxidizing a cellulose raw material with hypochlorous acid, or a salt thereof, having an available chlorine concentration of from 14% by mass to 43% by mass, to produce an oxidized cellulose; and fibrillating the oxidized cellulose into nanofibers.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for producing cellulose nanofibers, the method comprising: oxidizing a cellulose raw material with a solution prepared from hypochlorous acid, or a salt thereof, having an available chlorine concentration of from 14% by mass to 43% by mass, not with 2,2,6,6-tetramethylpiperidine 1-oxyl radical (TEMPO), to produce an oxidized cellulose; and fibrillating the oxidized cellulose into nanofibers. 2. The method for producing cellulose nanofibers according to claim 1 , wherein the available chlorine concentration of the hypochlorous acid or the salt thereof is from 18% by mass to 43% by mass. 3. The method for producing cellulose nanofibers according to claim 1 , wherein the hypochlorous acid or the salt thereof comprises sodium hypochlorite.
Assignees
Inventors
Classifications
- C08B15/04Primary
Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide · CPC title
Oxycellulose; Hydrocellulose; {Cellulosehydrate, e.g. microcrystalline cellulose} · CPC title
Preparation of other cellulose derivatives or modified cellulose {, e.g. complexes} · CPC title
- C08L1/04Primary
Oxycellulose; Hydrocellulose {, e.g. microcrystalline cellulose} · CPC title
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- What does patent US11713360B2 cover?
- An object of the present invention is to provide an efficient method for producing cellulose nanofibers, without N-oxyl compounds such as TEMPO remaining in the cellulose nanofibers. Provided is a method for producing cellulose nanofibers, the method including: oxidizing a cellulose raw material with hypochlorous acid, or a salt thereof, having an available chlorine concentration of from 14% by…
- Who is the assignee on this patent?
- Toagosei Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08B15/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 01 2023 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).