Process for making partly-hydrolyzed cellulose using compressed cellulosic materials
US10697122B2 · kind B2 · utility
0Cited by
11References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2012 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Feb 17, 2035 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H11/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for contacting and reacting fine cellulosic material with acid to produce partly-hydrolyzed cellulose, in which the cellulose is compressed to form higher density material, resulting in reduced consumption of acid and increased uniformity of reaction times. Cellulosic material, such as ground wood pulp, is compressed to reduce the interstitial spaces therein. The compressed material is contacted with an acid, such as sulfuric acid, which is allowed to wick into the interstitial spaces and react with the cellulose to produce partly-hydrolyzed cellulose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.