Cellulose fiber-based compositions and their method of manufacture
US6506435B1 · kind B1 · utility
19Cited by
46References
14Claims
0Family size
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Key dates
| Filing date | Nov 3, 1999 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Nov 3, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1324
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved method for refining cellulose that produces a highly refined cellulosic material comprising soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. Also, a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g H2O/g dry HRC is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.