... 蒸馏过程 still process; stillprocess 高真空蒸馏 high vacuum distillation; high-vacuum distillation; hight vacuum distillation 真空蒸馏 distil under vacuum; distillation under vacuum; reduced pressure distillation; reduced-pressure distillation; vacuum diffusion; vacuum distillation plant; vacuum distilling; vacuum evaporation; vacuum still; vacuum topping; vacuumdistillation ...
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The refined product with high purity is obtained by vacuum distillation of crude benzal chloride.
将制得的苄叉二氯粗品进行真空精馏得到高纯度的精品；
Meanwhile the refining process was improved, using crystallization from petroleum-benzene instead of high vacuum distillation. The process was simplified for the benefit of industry production.
同时改进了精制工艺，用石油醚-苯进行结晶代替高真空蒸馏，简化了工艺，有利于工业化生产。
The three main methods for high purity zinc preparation, including electrolytic method, vacuum distillation, zone refining, are summarized and compared in this paper.
本文对目前高纯锌的三种主要制备方法(电解法、真空蒸馏法、区域熔炼法)进行了综述和比较。
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