总结了磷化氢的精制方法，主要有吸附法、低温精馏法和膜分离法等。
The purification methods of phosphine include adsorption method, low temperature distillation method and membrane separation method etc.
针对氢同位素低温精馏物系的特点，提出了一种新的操作方法——准间歇精馏操作。
A new kind of operation policy-Quasi-batch distillation is proposed for specific conditions in hydrogen cryogenic distillation.
应用严格的热力学模型研究了带有侧线返回进料的氢同位素低温精馏塔的分离特性。
A rigorous thermodynamic model was used to study the characteristics of cryogenic distillation column of hydrogen isotope system having feedback stream.
应用严格的热力学模型研究了氢同位素低温精馏塔在不同进料扰动、回流比扰动以及馏出量扰动情况下的动态响应情况。
The study of different processes and operations in dynamic behavior of a column has been done in detail using a rigorous thermodynamic model.
其中第一步合成是关键，本文首次系统地研究了间接的两步法、低温吸附法、催化精馏法合成2，2-二甲氧基丙烷。
Various methods including indirective two-step synthesis , freezing-drying and catalytic rectification were used to synthesize 2,2-dimethoxypropane.
其中第一步合成是关键，本文首次系统地研究了间接的两步法、低温吸附法、催化精馏法合成2，2-二甲氧基丙烷。
Various methods including indirective two-step synthesis , freezing-drying and catalytic rectification were used to synthesize 2,2-dimethoxypropane.
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