Invention Grant
- Patent Title: Method for preparing cellulose dope
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Application No.: US15679334Application Date: 2017-08-17
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Publication No.: US11008406B2Publication Date: 2021-05-18
- Inventor: Vivek Ganvir , Madan Kumar Singh , Sachin Jadhav Gajanan , Yogesh Shinde , Shirish Thakre
- Applicant: Aditya Birla Science & Technology Company Private Limited
- Applicant Address: IN Mumbai
- Assignee: Aditya Birla Science & Technology Company Private Limited
- Current Assignee: Aditya Birla Science & Technology Company Private Limited
- Current Assignee Address: IN Mumbai
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
- Main IPC: C08B1/00
- IPC: C08B1/00 ; C07C69/88 ; C07D265/30 ; C07D233/54 ; D01F2/02

Abstract:
The invention relates to a method for preparing a cellulose dope comprising mixing and dissolving the cellulosic raw material in dilute and concentrated aqueous organic solvent in a two-stage process to form a homogeneous slurry, followed by heating the homogeneous slurry to obtain a cellulose dope containing 11% to 20% cellulose by weight. The invention also relates to a cellulose dope comprising 11% to 20% cellulose by weight and 73% to 79% aqueous organic solvent wherein the concentration of the cellulosic and metallic impurities in the cellulose dope shows a percent reduction of 20% to 50% from the cellulosic raw material.
Public/Granted literature
- US20170362342A1 METHOD FOR PREPARING CELLULOSE DOPE Public/Granted day:2017-12-21
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