溶剂

Shenzhen in southern China are the most powerful agent of Shell lubricants, Mobil, Caltex Oil, the Great Wall, BP, Esso ESSO branded lubricants and chemicals such as solvents enterprises.

深圳市兴达润滑油有限公司是华南地区最有实力代理壳牌润滑油、美孚、加德士、长城、BP、埃索ESSO等润滑油品牌及化工溶剂的企业。

The effect of water on the stability and the esterification activity of Lipase in organic solvents was studied in part Ⅰ.

在第Ⅰ部分中着重研究了水分对柱状假丝酵母脂肪酶在有机溶剂中的稳定性及其催化酯化活性的影响。

In this study, a rapid method for the determination of trace estrogens (ethinyl estradiol, estradiol, estriol, and estrone) in cosmetic water by LPME coupled with high performance liquid chromatography was developed.

建立了液相微萃取-高效液相色谱联用测定爽肤水中痕量的雌三醇，雌二醇，炔雌醇和雌酮的分析方法，研究了萃取溶剂种类，接受相体积，搅拌速度，萃取时间等对萃取效率的影响。

The solubilities of 11 kinds of solid in supercritical CO2,ethane and ethylene were calculated with ...

与密度相比，溶剂与溶质的溶解度参数差更能直观地反映出超临界流体对物质的溶解能力，且具有明确的理论基础，应该引起足够的重视和推广。

To decrease the acid value of the product,adding some ethanolamine into the solvent is a good method,but the RI of the product has a slight increase.

为了降低产品的酸值，向溶剂中加入适量的乙醇胺是一个好方法，但是会使产品的折光率略有上升。

The new aproach of which can be achieved via the oxidation of 2-naphthylamine (39) by CuCl〓benzylamine or ethanolamine (2: 1) in methanol under mild condition with isolated yield up to 74％.

本文开发出利用2-萘胺（39）为原料，以氯化铜—苄胺或乙醇胺（2：1）作为氧化偶合试剂，在温和的条件下和甲醇溶剂中，以高达74％的产率合成40的新方法。

Project Content: Introducing whole set of production line abroad, the main machine equipment of etherization caldron has the advantages of big capacity, good airtight capability, stable products quality and high impregnant-availability.

采用国外先进技术和整套生产装置，主反应装置-醚化釜具有容积大、密封性好、提高生产效益、稳定产品质量、溶剂利用率高等优点。

The UV-Visible absorption spectra and the fluorescence emission spectra of sixteen tetra-substituted metallo-phthalocyanine complexes {R4PcM, where R=2-［4-(2-sulfonic ethyl)piperazin-1-］ ethoxyl, 2-(piperidin-1-yl)ethoxyl; substitution position at α-position and β-position of phthalocyanine ring; M=Zn, Ni, Coand Cu} were measured.

报道了16种含哌嗪或含哌啶四取代酞菁金属配合物{R4PcM， R=2-［4-(2-磺基乙基)哌嗪-1-基］乙氧基、 2-(哌啶-1-基)乙氧基；取代位置分别在α位和β位； M=Zn， Ni， Co， Cu}的UV-Vis吸收光谱和荧光发射光谱的测定，探讨了中心金属离子、取代基种类及其取代位置、溶剂等因素对酞菁金属配合物UV-Vis吸收光谱和荧光发射光谱性质的影响。

Ethyl acetate is one of the most important chemical solvents;nowadays it has a very large demand quantity in the whole world, especially in China.

乙酸乙酯是一种非常有用的基本工业溶剂，目前乙酸乙酯在国内外都有很大的需求。

However, due to the relatively high solubility of 2 in ethyl acetate, an anti-solvent is required to achieve an optimal yield.

不过，由于较高的溶解度乙酸乙酯2、反溶剂须达到最优产量。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。