发明名称 |
FORMING SOLUTIONS OF CELLULOSE IN AQUEOUS TERTIARY AMINE OXIDE |
摘要 |
A method is described for forming a solution of cellulose in a tertiary amine oxide (such as N-methylmorpholine N-oxide) and a non-solvent for cellulose (such as water). The method involves the preparation of a mixture containing excess non-solvent, and removing the excess by heating the mixture to a temperature in excess of the boiling point of the non-solvent at a predetermined sub-atmospheric pressure, and feeding the heated mixture into the introduction zone of a mixing chamber at the predetermined sub-atmospheric pressure, so as to cause flash evaporation of some of the excess non-solvent. The mixture in the mixing chamber is then agitated by a rotor and transported through the mixing chamber whilst further evaporation of the non-solvent occurs. The cellulose solution thus formed is extracted from the mixing chamber, and the evaporated non-solvent withdrawn in cocurrent mode from the same end of the mixing chamber. Apparatus for carrying out the method is also described.
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申请公布号 |
CA2209567(A1) |
申请公布日期 |
1996.07.18 |
申请号 |
CA19962209567 |
申请日期 |
1996.01.09 |
申请人 |
COURTAULDS FIBRES (HOLDINGS) LIMITED;BUSS AG;AKZO NOBEL FASER AG |
发明人 |
QUIGLEY, MICHAEL;RONCHETTI, KATHARINE ANNE;ARMISTEAD, ROGER JAMES REES;RONCHETTI, ANDREW;NUSSBERGER, WERNER;NAEF, RAINER |
分类号 |
C08B1/00;D01D1/00;D01D1/02;D01F2/00;(IPC1-7):D01D1/02;D01F2/02 |
主分类号 |
C08B1/00 |
代理机构 |
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