Method of making bleached microcrystalline cellulose
US10597820B2 · kind B2 · utility
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9References
14Claims
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Key dates
| Filing date | May 6, 2016 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | May 9, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of producing bleached microcrystalline cellulose which method comprises neutralizing or alkalizing an acidic microcrystalline production reaction mixture slurry, typically produced by acid hydrolysis or by electronic beam irradiation, followed by adding an oxidant to such reaction mixture. This practice of this method permits the production of microcrystalline cellulose having desirable color stability as well as compression characteristics suitable for pharmaceutical binder use from paper grade and other low purity pulps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.