查询词典 fluorination

The effects of fluorination and side-chain identity on supramolecular and thermal behavior were investigated by wide-angle X-ray diffraction, differential scanning calorimetry, and polarized optical microscopy.

的影响和氟化侧链身份和超热行为进行调查广角X-射线衍射，差示扫描量热仪，偏光显微镜。

The calixarenes used as PTC in the fluorination of tetrachlorophthahaloyl chloride to obtain dimethyl tetrafluoroterephthalate were studied in this paper.

研究了杯芳烃在四氯对苯二甲酰氯氟化制备四氟对苯二甲酸二甲酯反应中的相转移催化作用，发现以杯芳烃作相转移催化剂使产品收率得到了明显提高。

It was found when ionic liquid BF_4 was chosen for the solvent and CsF for the fluorination reagent, the overall yield 96.6% could be gotten after 3 hours.

通过研究我们发现在离子液体BF_4中，采用CsF做氟化剂反应3小时七氟醚的产率可以达到96.6％。

Reaction conditions are studied, and the result shows that it is better to adopt mercuric oxide or mercuric fluoride as fluorination catalyst with reaction temperature -20~-10℃.

结果表明，采用氧化汞或氟化汞作氟化催化剂、氟化氢作溶剂较好，适宜的反应温度为－20~-10℃，较长的反应时间(48 h)和增加氟化氢和催化剂的量有利于氟化。2-氯－5-三氯甲基吡啶的转化率和选择率均可达到97%以上。

With acidic etching and fluorination treatment, super-hydrophobic surface is successfullymade on aluminous flake.

本文首先在与微通道材质相同的铝片上进行了超疏水表面的制备。

The manufacturers must consider barrier technologies like fluorination post-treatment in order to improve the permeation performance of the plastic fuel tank.

这个燃油渗透限值使目前的单层HDPE塑料油箱无法满足新的法规，必须对塑料油箱进行表面氟化处理以提高燃油阻渗性。

So it has made the great progress. The method studied in this research from o-Dichlorobenzene is a ideal route to synthesize 2,4- dichlorofluorobenzene, which has temperate condition easy to control,safe process,low cost and good quality of products; The method of Phase transfer catalysis fluorination without solvent is better than present technology in presence of DMSO as solvent in many aspects; In a word,it is worth being promoted by the domestic correlative factories.

本课题所研究的以邻二氯苯为原料的2，4-二氯氟苯合成路线反应条件温和，工艺容易控制，生产安全，而且产品质量好，是比较理想的合成路线；以季胺盐为催化剂的无溶剂相转移催化氟化法与溶剂法相比具有明显的优势；通过实验确定的工艺条件对工业化生产有重要的指导意义，可提高以邻二氯苯为原料的工艺路线的市场竞争力。

Preparation method of perfluorooctane based on n-octane and anhydrous hydrogen fluoride as starting materials via electrochemical fluorination is described in detail finally.

介绍了全氟辛烷的性质和用途，列举了合成全氟辛烷的各种工艺路线，最后较为详细地论述了以正辛烷和无水氟化氢为原料，通过电化学氟化法制备全氟辛烷的工艺过程。

Methyl-2,3,5,6-tetrafluoro-benzene methanol was synthesized by chlorination, acylation, fluorination, esterifica- tion, reduction, bromization, reduction from terephthalic acid. Tefluthrin was obtained from-(1RS,3RS)-3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropa-necarboxylate acid by reacting with 4-methyl-2,3,5,6-tetrafluoro-benzene methanol.

以对苯二甲酸为原料，经氯化、酰氯化、氟化、酯化、还原、溴化、还原七步反应合成了4-甲基-2，3，5，6-四氟苄醇，甲基苄醇与-(1RS，3RS)-3-(2-氯-3，3，3-三氟丙-1-丙烯基)-2，2-二甲基环丙甲酸一步酯化合成了七氟菊酯。

In this paper,NBR was modified by fluorinating with XeF2 and the reaction kinetics of fluorination was studied by FT-IR spectrometry.The apparent reaction order of 1.5 was suggested,which seemed to become less for long reaction time.

目前报道的高分子表面氟化改性的方法很多，主要的方式有：辐射接枝法、等离子体活化法[1，2]、静电喷涂法、离子注入法及氟化剂表面化学反应法[3—7]等。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。