Invention Application
- Patent Title: CROSSLINKED CELLULOSE AS LOW-COST PRECURSOR IN PRODUCTION OF HIGH-GRADE CELLULOSE DERIVATIVES AND RELATED TECHNOLOGY
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Application No.: US15067760Application Date: 2016-03-11
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Publication No.: US20170247833A1Publication Date: 2017-08-31
- Inventor: Mengkui Lou
- Applicant: WEYERHAEUSER NR COMPANY
- Applicant Address: US WA FEDERAL WAY
- Assignee: WEYERHAEUSER NR COMPANY
- Current Assignee: WEYERHAEUSER NR COMPANY
- Current Assignee Address: US WA FEDERAL WAY
- Main IPC: D21C9/00
- IPC: D21C9/00 ; D21H13/04 ; D21C9/18 ; D21C9/147 ; D21C9/10

Abstract:
A pulp in accordance with a particular embodiment includes crosslinked cellulose fibers. The pulp can have high brightness, reactivity, and intrinsic viscosity. The pulp, therefore, can be well suited for use as a precursor in the production of low-color, high-viscosity cellulose derivatives. A method in accordance with a particular embodiment of the present technology includes forming a pulp from a cellulosic feedstock, bleaching the pulp, crosslinking cellulose fibers within the pulp while the pulp has a high consistency, and drying the pulp. The bleaching process can reduce a lignin content of the pulp to less than or equal to 0.09% by oven-dried weight of the crosslinked cellulose fibers. Crosslinking the cellulose fibers can include exposing the cellulose fibers to a glycidyl ether crosslinker having two or more glycidyl groups and a molecular weight per epoxide within a range from 140 to 175.
Public/Granted literature
- US09926665B2 Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology Public/Granted day:2018-03-27
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