تفاعل #1951011

معادلة التفاعل

formaline

phenol

sulfuric acid

meta-xylene

→

xylene-formaldehyde

ظروف التفاعل

المعالجة

1. 1
   أخرىA 2L-separable flask equipped with a thermometer
2. 2
   درجة الحرارةreflux condenser and stirrer
3. 3
   أخرىwere reacted at 84-88° C. for 4 hours
4. 4
   أخرىAfter termination of the reaction
5. 5
   أخرىto be separated into the resin phase and aqueous sulfuric acid phase
6. 6
   غسيلThe resin phase was washed three times with water

الإجراء التجريبي

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.)

المصدر