تفاعل #1946556

معادلة التفاعل

N-methylmorpholine-N-oxide

gallic acid propyl ester

→

NMMO water

المردود 83.0%

المذيبات

water

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المعالجة

1. 1
   درجة الحرارةheated to above 72° C
2. 2
   أخرىabout 100 g of water is then separated under vacuum
3. 3
   أخرىAfter water removal step a clear cellulose solution
4. 4
   أخرىis obtained
5. 5
   workup.STIRRINGwhile being stirred simultaneously
6. 6
   أخرىAfter approximately 30 to 60 minutes a cellulosic solution is obtained
7. 7
   أخرىto separate the water

الإجراء التجريبي

Approximately 1073 grams of tertiary amine oxide such as N-methylmorpholine-N-oxide in water (76% NMMO, 24% H2O), 16 g of cellulose (DP=625, 5% moisture content) and 1.5 g stabilizer, e.g., gallic acid propyl ester, are prepared in a container and heated to above 72° C. This solution is stirred for approximately 15 minutes and about 100 g of water is then separated under vacuum. After water removal step a clear cellulose solution is obtained. Alternatively, 554 g of NMMO/water mixture (83% NMMO), 0.8 g stabilizer and 11.3 g cellulose are prepared in a container and heated to approx. 95° C. while being stirred simultaneously. After approximately 30 to 60 minutes a cellulosic solution is obtained. In this procedure it is no longer necessary to separate the water.

المصدر