Method for preparing cellulose spinning stock solution

Method for preparing cellulose spinning stock solution

  • CN 102,358,957 B
  • Filed: 08/24/2011
  • Issued: 01/07/2015
  • Est. Priority Date: 08/24/2011
  • Status: Active Grant
First Claim
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1. a method for double screw extruder and Wiped Film Evaporator coupling continuous preparation of cellulose spinning solution, is characterized in that:

  • twin-screw extrusion machine inlet capable place is provided with feeding chamber, and described feeding chamber is made up of cellulose feed mouth and solvent feed mouth;

    Cellulose and solvent are fed respectively the feeding chamber of double screw extruder, the cellulose after dissolving obtains cellulose spin dope after deaeration;

    Described cellulose feed mouth and solvent feed opening'"'"'s edge double screw extruder axially-aligned, solvent feed mouth is positioned at cellulose feed mouth front, and the minimum range of cellulose feed mouth and screw rod is 0.1cm;

    Described solvent is alkali/urea or alkali/thiourea solution system;

    Described twin-screw extrusion machine drum body outside is provided with the cooling jacket that can pass into cooling medium, and described cooling jacket internal diameter is consistent with double screw extruder external diameter, and cooling jacket external diameter is the large 5 ~ 20cm of internal diameter comparatively;

    Be provided with spiral flow deflector in described cooling jacket, outside cooling jacket, be provided with heat insulation layer;

    Double screw extruder each section of temperature is-15 DEG C ~ 30 DEG C, and each section of temperature fluctuation controls within the scope of ±

    1 DEG C;

    Described Wiped Film Evaporator outside is provided with the cooling jacket of band flow deflector, is provided with heat insulation layer outside cooling jacket;

    Wiped Film Evaporator temperature is-15 DEG C ~ 30 DEG C;

    The tilt adjustable of the scraper plate of described Wiped Film Evaporator;

    Be one for holding the taper kettle of deaeration spinning solution bottom Wiped Film Evaporator;

    Be provided with a cone-type spiral agitator in kettle, the cone angle of described cone-type spiral agitator is consistent with the cone angle of taper kettle.

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