The results showed that the second solvent used in multiple-stage solvent-exchange technique and shrinking temperature have an important effect on separation performance.
试验结果表明，所采用的第二溶剂及热处理温度对膜分离特性有重大影响。
The methods of preparing high purity iron include solvent extraction, ion exchange, electrolytic refining, zone melting, and so on.
本文介绍了溶剂萃取、离子交换、电解精炼和区域熔炼等冶金提纯方法在高纯铁制备过程中的应用。
The practice showed chemical regent did not need to regenerate even long time use. Its using lifetime was longer than ionic exchange resin's. It was ideal solvent purification measure.
实践表明：凝胶色谱即使长期使用也无需用化学试剂再生，使用寿命比离子交换树脂更长，是一种比较理想的溶剂净化手段。
There are solvent extraction, ion exchange, vacuum melting, vacuum distillation or sublimation, electro migration and regional melting, etc.
主要有溶剂萃取、离子交换、真空熔融、真空蒸馏或升华、电迁移以及区域熔炼等。
The catalyst system consists of solid strong acid ion exchange resin, organic solvent and copper powder in certain proportion, and the reacted catalyst system may be recovered for reuse.
该催化系统由固体强酸离子交换树脂、有机溶剂和铜粉以一定比例组成，该催化系统在反应后可再回收循环利用。
The solvent exchange and frozen-dry were adopted to solve the problem that the structure collapses in the dry course of gel.
采用溶剂交换-常压干燥法以及冷冻干燥法两种方法解决了凝胶干燥过程中网络结构塌陷的问题。
The lean solvent sulfolane processing amount were larger than 300per mass of the anion-exchange resin.
用阴离子交换树脂法净化环丁砜贫溶剂，单位树脂净化量大于300。
The control schemes for the solvent heat exchange section include the single-loop fixed value control for the pressure in the flashing tank and that for the liquid level of the flashing tank.
溶剂换热部分控制方案包括闪蒸罐压力的单回路定值控制和闪蒸罐液位的单回路定值控制。
The control schemes for the solvent heat exchange section include the single-loop fixed value control for the pressure in the flashing tank and that for the liquid level of the flashing tank.
溶剂换热部分控制方案包括闪蒸罐压力的单回路定值控制和闪蒸罐液位的单回路定值控制。
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