甲

The 3-chloro-4-trifluoromethoxy benzonitrile was synthesized from 3-chloro-4-trifluorome- thoxy aniline by diazotization, formaldoximation ,hydrolysis and cyanation.

以3-氯-4-三氟甲氧基苯胺为原料，经重氮化、甲醛肟化、水解和腈化反应得到纯度≥99。

The optimal separating condition of chromatography analysis was: Shimadzu VP-ODS 150mm4.6mm as chromatographic column; acetonitrile/water (12/88,V/V, Contained 1.25mmol/l phosphoric acid) as mobile phase with flow rate of 1.0ml/min. Macroporous ion exchange resins and activated carbon were applied to enrich the trace level impurities and the main impurities was determined by LC-MS and GC-MS.They were : Benzonitrile , 2-Methyl-8-hydroxyquinoline, 2,6-Pyridinediamine , O-ethyloxime Cyclo-hexanone and compound with 220 molecular weight .

采用离子树脂和活性炭吸附富集这些微量的杂质，并通过液质联用和气质联用对杂质进行了定性分析，鉴定了影响290nm吸收的主要杂质为苯甲腈，2甲基-8羟基喹啉，2，6二氨基吡啶，O-乙基环己酮肟和分子量220的物质。

We provide intermediates of Methylphenidate HCl: 2-Phenyl-2-(2-Piperidyl) Acetamide; 2-Phenyl-2-(2-Piperidyl) Acetic Acid; Series of Benzoic Acid、Benzonitrile; Other pharmaceutical intermediates.

提供盐酸利他林中间体：2-苯基-2-(2-哌啶基)乙酰胺；2-苯基-2-(2-哌啶基)乙酸；苯甲酸、苯甲腈系列及其他医药中间体。

It is a double-molecular light initiationless, on a commonly used with Benzophenone old p, and so on.

它是双分子光引发剂，在上光油中常用的有二苯甲酮旧P等。

They are odor and taste neutral and do not use Benzophenone or ITX.

他们是气味和味道中立和不使用二苯甲酮或主板。

Experimental research on benzophenone synthesis is carried out including catalyst and solvent selection, ratio and temperature control.

把清洁生产理论和多个具体的清洁生产单元技术用于重组和优化二苯甲酮生产的流程结构和过程参数。

Synthesis technology and purification method and cleaner production of benzophenone by phosgene are studied.

本文系统研究了光气路线生产二苯甲酮的合成技术、纯化方法及相应的清洁生产模式。

A new polysiloxane with the side chain of benzophenone groups is synthesized.

合成了侧链中含二苯甲酮基的聚有机硅氧烷。

Diphenylacetylene and benzophenone have good radiation protection effects due to their special radiation protection mechanism.

二苯乙炔和二苯甲酮由于其独特的辐射保护机理而具有很好的辐射保护效果。

The experimental results showed that low bicarbonate ion and little humic substances were profitable to degradation of benzophenone.

实验中发现低碱度和低浓度腐殖酸更有利于二苯甲酮的氧化去除。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。