公开(公告)号：US20170247833A1

公开(公告)日：2017-08-31

申请号：US15067760

申请日：2016-03-11

Applicant: WEYERHAEUSER NR COMPANY

Inventor： Mengkui Lou

IPC: D21C9/00 ,  D21H13/04 ,  D21C9/18 ,  D21C9/147 ,  D21C9/10

CPC classification number: D21C9/005 ,  C08B15/10 ,  C08H8/00 ,  D21C9/1063 ,  D21C9/147 ,  D21C9/18 ,  D21H13/04

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.

公开(公告)号：US20170247839A1

公开(公告)日：2017-08-31

申请号：US15067749

申请日：2016-03-11

Applicant: WEYERHAEUSER NR COMPANY

Inventor： Mengkui Lou

IPC: D21H13/04

CPC classification number: D21C9/005 ,  C08B15/10 ,  C08H8/00 ,  D21C9/1063 ,  D21C9/147 ,  D21C9/18 ,  D21H13/04

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.