EP 1230272 A1 20020814 - DEVICE FOR CONTINUALLY PRODUCING AN EXTRUSION SOLUTION
Title (en)
DEVICE FOR CONTINUALLY PRODUCING AN EXTRUSION SOLUTION
Title (de)
VORRICHTUNG ZUR KONTINUIERLICHEN HERSTELLUNG EINER EXTRUSIONSLÖSUNG
Title (fr)
DISPOSITIF DE PREPARATION CONTINUE D'UNE SOLUTION D'EXTRUSION
Publication
Application
Priority
- DE 0003411 W 20000929
- DE 19949720 A 19991015
Abstract (en)
[origin: WO0127161A1] The invention relates to a method for continually producing an extrusion solution for producing cellulosed shaped bodies, such as fibres and films, according to the lyocell method. According to the inventive method, (a) a cellulose suspension is produced from cellulose and an aqueous phase in a mass ratio ranging from 1:3 to 1:40, whereby shearing is maintained for between 5 to 200 minutes. (b) The cellulose suspension is dewatered to form a material having a cellulose content ranging from 20 to 80 mass % and the aqueous phase produced thereby is at least partially returned to step (a). (c) The humid cellulose material being homogenised is transported through a first shearing zone in the absence of N-methylmorpholine-N-oxide. (d) The cellulose material is transported through a second shearing zone after sufficient aqueous N-Methyl-morpholine-N-oxide has been added to the homogenised cellulose material so that, after mixing, a suspension having a N-Methylmorpholine-N-oxide content ranging from 70 to 80 mass % in the liquid phase is obtained. The cellulose material or the suspension completely fills in the available cross-section of transport in the shearing zones and (e) the produced cellulose suspension being sheared is converted into the extrusion solution in aqueous N-Methylmorpholine-N-oxide, whereby water evaporates.
IPC 1-7
IPC 8 full level
C08B 1/00 (2006.01); C08J 5/18 (2006.01); C08L 1/02 (2006.01); D01D 1/02 (2006.01); D01F 2/00 (2006.01)
CPC (source: EP US)
C08B 1/003 (2013.01 - EP US); D01D 1/02 (2013.01 - EP US); D01F 2/00 (2013.01 - EP US)
Citation (search report)
See references of WO 0127161A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0127161 A1 20010419; AU 1691401 A 20010423; CN 1170852 C 20041013; CN 1379787 A 20021113; DE 19949720 A1 20010607; DE 19949720 C2 20030618; EP 1230272 A1 20020814; US 6972102 B1 20051206
DOCDB simple family (application)
DE 0003411 W 20000929; AU 1691401 A 20000929; CN 00814339 A 20000929; DE 19949720 A 19991015; EP 00979394 A 20000929; US 8877302 A 20020624