公开(公告)号：US20230203717A1

公开(公告)日：2023-06-29

申请号：US17926645

申请日：2020-05-19

Applicant: Aalto University Foundation sr

Inventor： Herbert Sixta ,  Sherif Elsayed ,  Inge Schlapp-Hackl ,  Joanna Witos ,  Sanna Hellsten ,  Petri Uusi-Kyyny ,  Michael Hummel ,  Ville Alopaeus

IPC: D01F2/02 ,  D01F13/00

CPC classification number: D01F2/02 ,  D01F13/00

Abstract: According to an example aspect of the present invention, there is provided A process for the production of a cellulose filaments or films, comprising the steps of dissolving a cellulose substrate in an ionic liquid consisting of the superbase cation 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-enium [mTBDH]+ and an anion to produce a solution forming a spinning dope, said anion being derived from an acid which is present at a stoichiometric excess to the superbase, extruding the spinning dope through a spinneret in a coagulation bath containing water to form filaments or films from the solution, withdrawing ionic liquid in an aqueous mixture with water from the coagulation bath, recovering the ionic liquid [mTBDH][OAc] from the aqueous mixture by removing water and optionally recycling the recovered ionic liquid to the dissolution step.