The qualitative analysis of N polyaromatics in heavy oil was made by a double adsorption separation followed by the application of low voltage ionization and high resolution MS direct sampling.
通过两次吸附分离，然后采用低压电离，高分辨质谱直接进样技术对重馏份油中的含氮多环芳烃进行定性测定。
N-Substituted amides possess excellent properties for the separation of niobium and tantalum.
取代酰胺萃取分离铌、钽的性能良好。
The paper introduces the design and application of perforated weir-riser distributor with toothed weir, which is used in the modification of n-paraffin separation unit.
详细介绍了带齿形堰的筛孔溢流盘式分布器在正构烷烃分离装置改造中的设计与应用情况。
Finally the separation of n-hexane and ethyl acetate was tested with an industrial column in a way of batch azeotropic distillation.
最后进行了工业间歇共沸精馏分离正己烷和乙酸乙酯的实验研究。
The separation of n-pentane, n-hexane and n-heptane mixture with the dividing wall column(DWC) was simulated with commercial software HYSYS, and the optimized operation region was obtained.
以正戊烷、正己烷和正庚烷为分离物系，在简捷计算结果的基础上，利用商业模拟软件HYSYS研究了进料热状态、进料组成和相对挥发度等进料性质对立式隔板塔操作的影响。
From 1-phenyl-2-propylamine, selegiline hydrochloride, an anti-Parksins drug, was synthesized via N-methylation, enantiomer separation, N-alkylation and salt formation with an overall yield of 42.2%.
以1- 苯基- 2-丙胺为原料，经N- 甲基化、拆分、N-炔基化、成盐共4步反应合成盐酸司来吉兰，总收率为42。
From 1-phenyl-2-propylamine, selegiline hydrochloride, an anti-Parksins drug, was synthesized via N-methylation, enantiomer separation, N-alkylation and salt formation with an overall yield of 42.2%.
以1- 苯基- 2-丙胺为原料，经N- 甲基化、拆分、N-炔基化、成盐共4步反应合成盐酸司来吉兰，总收率为42。
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