反应 #1951011

反应方程式

formaline

phenol

sulfuric acid

meta-xylene

→

xylene-formaldehyde

反应条件

后处理

1. 1
   其他A 2L-separable flask equipped with a thermometer
2. 2
   温度reflux condenser and stirrer
3. 3
   其他were reacted at 84-88° C. for 4 hours
4. 4
   其他After termination of the reaction
5. 5
   其他to be separated into the resin phase and aqueous sulfuric acid phase
6. 6
   洗涤The resin phase was washed three times with water

实验过程

A 2L-separable flask equipped with a thermometer, reflux condenser and stirrer was charged with 240 parts of 50% formaline, 55 parts of phenol, 101 parts of 98% industrial sulfuric acid and 212 parts of meta-xylene, which were reacted at 84-88° C. for 4 hours. After termination of the reaction, the reaction mixture was allowed to stand to be separated into the resin phase and aqueous sulfuric acid phase. The resin phase was washed three times with water, stripped of unreacted meta-xylene for 20 minutes under the conditions of 20-30 mmHg/120-130° C., to provide a xylene-formaldehyde resin having a viscosity of 1050 centipoise (25° C.)

来源