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.

公开(公告)号：US11549200B2

公开(公告)日：2023-01-10

申请号：US16481071

申请日：2018-01-30

Applicant: Aalto University Foundation sr ,  Helsingin yliopisto

Inventor： Herbert Sixta ,  Michael Hummel ,  Kadvaël Le Boulch ,  Ilkka Kilpeläinen ,  Alistair W.T. King ,  Jussi Helminen ,  Sanna Hellsten

IPC: D01F2/00 ,  B29C48/00 ,  C08J5/18 ,  D01F13/02 ,  B29K1/00 ,  B29L7/00

Abstract: According to an example aspect of the present invention, there is provided A process for making a cellulose fibre or film comprising the steps of dissolving pulp in an ionic liquid containing a cationic 1,5,7-triazabicyclo[4.4.0]dec-5-enium [TBDH]+ moiety and an anion selected from the group according to Formula a), Formula b) and Formula c), wherein each of R, R2, R3, R4, R5, R7, R8, R9 and R10 is H or an organyl radical and X− is selected from the group consisting of halides, pseudohalides, carboxylates, alkyl sulphite, alkyl sulphate, dialkylphosphite, dialkyl phosphate, dialkyl phosphonites and dialkyl phosphonates, to provide a spinning dope, extruding the spinning dope through a spinneret to form one or more filaments, and a step selected from the group consisting of spinning cellulose fibres from the solution, and extruding a cellulose film from the solution.

公开(公告)号：US20200002848A1

公开(公告)日：2020-01-02

申请号：US16481071

申请日：2018-01-30

Applicant: Aalto University Foundation sr ,  Helsingin yliopisto

Inventor： Herbert Sixta ,  Michael Hummel ,  Kadvaël Le Boulch ,  Ilkka Kilpeläinen ,  Alistair W.T. King ,  Jussi Helminen ,  Sanna Hellsten

IPC: D01F2/00 ,  D01F13/02 ,  B29C48/00 ,  C08J5/18

Abstract: According to an example aspect of the present invention, there is provided A process for making a cellulose fibre or film comprising the steps of dissolving pulp in an ionic liquid containing a cationic 1,5,7-triazabicyclo[4.4.0]dec-5-enium [TBDH]+ moiety and an anion selected from the group according to Formula a), Formula b) and Formula c), wherein each of R, R2, R3, R4, R5, R7, R8, R9 and R10 is H or an organyl radical and X− is selected from the group consisting of halides, pseudohalides, carboxylates, alkyl sulphite, alkyl sulphate, dialkylphosphite, dialkyl phosphate, dialkyl phosphonites and dialkyl phosphonates, to provide a spinning dope, extruding the spinning dope through a spinneret to form one or more filaments, and a step selected from the group consisting of spinning cellulose fibres from the solution, and extruding a cellulose film from the solution.