Patent ID: 7097344

Claim:
A method for continuously producing a cellulose solution with a mixture of N-methylmorphorine-N-oxide (NMMO) containing water and cellulose powder, comprising: (A) feeding NMMO into a twin-screw extruder through a first side feeder of the twin-screw extruder; (B) feeding compressed cellulose powder extruder through a second side feeder of the twin-screw extruder at the same time as feeding NMMO in step (A); and (C) obtaining a swelled and homogenized cellulose solution by dispersing, mixing, shearing, kneading, melting and measuring the mixture of NMMO and cellulose powder from the twin-screw extruder, wherein the phase of NMMO through the first side feeder in step (A) is in a solid state by cooling initial liquid-state NMMO within a few seconds.