Methods for preparing alkali cellulose and cellulose ether
US9534061B2 · kind B2 · utility
1Cited by
18References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2006 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Dec 22, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B11/193
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is an efficient method for preparing alkali cellulose having the low water content and a uniform alkali distribution therein. More specifically, the invention is a method for continuously preparing alkali cellulose comprising steps of bringing pulp into continuous contact with an alkali metal hydroxide solution to generate a contact mixture and then draining the contact mixture by a centrifugal separator. The invention also includes a method for preparing cellulose ether comprising a step of etherifying the alkali cellulose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.