Use of aqueous NaOH/thiourea solution in pilot-scale production of cellulose products
US7981337B2 · kind B2 · utility
5Cited by
11References
15Claims
0Family size
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Key dates
| Filing date | Apr 21, 2006 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jun 16, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L1/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to the use of an aqueous sodium hydroxide/thiourea solution, specifically to the use of an aqueous sodium hydroxide/thiourea solution for pilot-scale production of cellulose products, wherein sodium hydroxide constitutes 8.1%-12.0% of the total weight of the aqueous solution, thiourea constitutes 3.0%-6.0% of the total weight of the aqueous solution, and said cellulose products include regenerated cellulose filaments, films, nonwovens, as well as composite fibers and/or functional materials of protein/cellulose, chitin/cellulose, Konjac Glucomannan/cellulose, nano-crystal particle/cellulose, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.