Method for producing cellulose nanofibers
US11713360B2 · kind B2 · utility
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Key dates
| Filing date | Jun 1, 2018 |
| Grant date | Aug 1, 2023 |
| Priority date | — |
| Expiry date | Feb 19, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B15/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.