the reduced pressure distillation experiment on the liquid paraffin was done and the engler distillation curve was obtained.
进行了石蜡油的减压蒸馏实验,得到了恩氏蒸馏曲线。
the high-purity mpc standard sample was obtained by reduced pressure distillation and the removal of minor phenol with dilute sodium hydroxide solution.
反应产物经减压精馏、堿洗、水洗、干燥等精制处理,得到了纯度较高的m pc标準品。
the production of reduced pressure distillation was analysed with ir, gc and studied by physical chemistry property.
通过正交试验得出其最佳条件,并对产物作了ir,gc分析和理化性能检验。
it is reveal by gc analysis that the purity of the tmp , treated by reduced pressure distillation and recrystallization in acetic ester , approximates to that of the reagent grade tmp .