The extraction results showed that among the solvents, n, N-dimethylformamide (DMF) was better than dimethyl sulfoxide, ethyl cyanide and methanol.
试验发现，溶剂n, N-二甲基甲酰胺(DMF)的萃取效果优于二甲亚砜、乙腈及甲醇。
Recent progress of primary amine N1923 research is summarized . Extraction mechanism is analyzed and influence on primary amine N 1923 extraction are discussed from various aspects.
本文总结了近年来伯胺N1923的研究进展，分析了萃取机理，从不同角度讨论了影响伯胺N1923萃取因素。
The electrolytic liquor can be repeatedly used over 8 times by regeneration after (extraction) by n-hexane and adsorption by activated carbon.
电解液经正己烷萃取和活性炭吸附可再生循环使用8次以上。
The ultrasound could promote the extraction of Mn with distilled water, however, it was not beneficial to the extraction of NH3-N.
超声波作用能促进蒸馏水对锰的提取，但不利于蒸馏水对氨氮的提取。
Several kinds of novel extraction solvents were presented which mainly included N - formylmorpholine, dimethyl formamide, etc.
介绍了石油化工领域采用的几种优良抽提剂，包括N-甲酰吗啉、二甲基甲酰胺等。
Selection of solvent is the key for extraction to separate n-alkanes from diesels and to improve the flow ability of diesels at low temperature.
溶剂筛选是溶剂萃取脱除柴油中正构烷烃，改善柴油低温流动性能工艺过程的关键。
Abstract : A process for extraction of absolute oil from Sichuan 'paste' tobacco was optimized through single factor test and orthogonal test with n-hexane as extraction solvent.
摘要 ： 以四川‘糊烟’为原料，正己烷为提取溶剂，在单因素试验基础上再经正交试验优化‘糊烟’净油提取工艺；
The ethyl acetate and n-butanol extraction were chromatographed on silica gel column, polyamide column, sephadex LH-20 column and preparing TLC, respectively.
采用硅胶、聚酰胺、葡聚糖凝胶LH-20柱层析法和制备薄层层析法对乙酸乙酯和正丁醇提取物进行了分离、纯化。
This paper describes the analytical method using gas -chromatography for systems of temperature swing extraction with n-dodecane, 1, 3.5-trimethyl benzene and tri-ethylene glycol.
本文描述了变温革取法用三甘醇分离正十二烷和1,3,5—三甲苯时样品的气相色谱分析方法。
We also researched the extraction-oxidation desulfurization with N-alkyl-pyridinium-based ionic liquids.
同时还研究了吡啶离子液体萃取-氧化汽油脱硫的情况。
We also researched the extraction-oxidation desulfurization with N-alkyl-pyridinium-based ionic liquids.
同时还研究了吡啶离子液体萃取-氧化汽油脱硫的情况。
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