Invention Grant
- Patent Title: Method to convert mechanical pulp derived waste material into value added cellulose products
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Application No.: US16480315Application Date: 2018-02-01
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Publication No.: US11486094B2Publication Date: 2022-11-01
- Inventor: Herbert Sixta , Yibo Ma , Michael Hummel
- Applicant: Aalto University Foundation sr
- Applicant Address: FI Aalto
- Assignee: Aalto University Foundation sr
- Current Assignee: Aalto University Foundation sr
- Current Assignee Address: FI Aalto
- Agency: Laine IP Oy
- Priority: FI20175085 20170201
- International Application: PCT/FI2018/050071 WO 20180201
- International Announcement: WO2018/142025 WO 20180809
- Main IPC: D21H13/08
- IPC: D21H13/08 ; D21C9/00 ; D21C3/00 ; D21C3/22

Abstract:
According to an example aspect of the present invention, there is provided a process for the conversion of cellulosic waste material into a recycled cellulose product comprising the steps of cooking the waste material in a cooking liquor to remove lignin from the waste material and provide a delignified pulp, dissolving the delignified pulp in an ionic liquid to provide a spinning dope suitable for dry jet-wet spinning in an ionic liquid solution, and subjecting the spinning dope to a further processing step to provide a recycled cellulose product, said further step selected from the group of spinning cellulose fibers for use in textiles from the solution, extruding a film product for use in packaging, regenerating the dope as a hydrogel and regenerating the dope as an aerogel.
Information query