Patent · US Expired

Method and device for the continuous, single-step production of a homogeneous solution of cellulose in hydrous tertiary aminoxides

US6875756B1 · kind B1 · utility

5Cited by

2References

27Claims

0Family size

Assignee

Thuringishces Institut fur Textil und Kunststoff-Forschung E.V. · DE

Inventors

Christoph Michels · Riegelsberg, DE
Andreas Diener · Großschirma, DE

Key dates

Filing date	Sep 5, 2000
Grant date	Apr 5, 2005
Priority date	—
Expiry date	Sep 5, 2020

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01F2/00
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method and a device for the continuous, single-step production of a homogenous solution of cellulose in hydrous aminoxides on the basis of cellulose and aqueous aminooxides, preferably N-methylmorpholino-N-oxide (NMMO), at temperatures in the range of from 50 to 130° C. under a vacuum and water evaporation. The cellulose and the NMMO are dosed separately to the device, mixed while sheared, the water is evaporated until the mixture is dissolved, the solution is homogenized and directly fed to the consumer via screw conveyors, pumps and filters.

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