Patent · US Active

Method for preparing cellulose dope

US11008406B2 · kind B2 · utility

0Cited by

5References

7Claims

0Family size

Inventors

Vivek Ganvir · Pune, IN
Madan Singh · Port Aransas, US
Sachin Jadhav Gajanan · Mumbai, IN
Yogesh Shinde · Mumbai, IN
Shirish Thakre · Mumbai, IN

Key dates

Filing date	Aug 17, 2017
Grant date	May 18, 2021
Priority date	—
Expiry date	Nov 21, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2301/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.