The free toluene diisocyanate(TDI) in the curing agent TDI-TMP(Trimethylol Propane) of polyurethane was separated in laboratory by means of high-vacuum two-stage thin-film evaporation.
在采用高真空两级薄膜蒸发分离甲苯二异氰酸酯（TDI）-三羟甲基丙烷（TMP）聚氨酯固化剂中游离TDI的实验研究基础上，进行了中试研究。
The thin film can be prepared by a plurality of film plating techniques such as high vacuum thermal evaporation, electron beam deposition and sputtering.
该薄膜可采用高真空热蒸发、电子束沉积以及溅射等多种镀膜技术制备。
In respect of the producing method, refined and high unmixed salt is usually made by multiple effect evaporation in vacuum, when man-made bittern is needed.
从制取方法上来讲，多效真空蒸发制盐是生产精制盐及高纯工业盐的重要方法。
Vacuum evaporation features high efficiency, thorough de-solvation and low solvent consumption in crude oil.
负压蒸发蒸发效率高，脱溶彻底，毛油中溶剂消耗低。
Vacuum evaporation features high efficiency, thorough de-solvation and low solvent consumption in crude oil.
负压蒸发蒸发效率高，脱溶彻底，毛油中溶剂消耗低。
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