查询词典 chlorinating

To effectively enhance the contraposition selectivity of chlorinating reaction the p-chlorotoluene was prepared by direct chlorination of toluene and chlorine gas in the presence of zeolite catalyst.

为了有效提高甲苯氯化反应的对位选择性，研究了在分子筛催化作用下甲苯与氯气直接氯化制取对氯甲苯。

The titled compound as an intermediate for preparing muscone is obtained by reacting a tetradecanedioic acid as the starting material with a chlorinating agent——chlorosulfoxide,followed by reacting the resultant reaction product on halogenomethylzinc .

采用直链十四碳二元酸为起始原料，先以氯化亚砜进行酰化，所得酰氯直接与甲基锌试剂反应进行甲基化，从而制得了合成麝香酮的重要中间体2，15-十六烷二酮，产物结构经1HNMRI、R确认。

The chlorinating tube ,bower plater ,tower sections cond ensers .tower contain condenser and tower contain ,etc.

氯化塔由塔顶冷凝器、塔节、氯分配器、溢流管、塔板、塔节冷凝器，塔釜冷凝器、塔釜等组成。

Results show that, by using thionyl chloride and N,N-dimethyl formamide as chlorinating reagent and dichloromethane as solvent and taking -15℃ as reaction temperature, Z-iomer crystals with pale white color and stable to temperature can be obtained with an overall yield of 70%.

以2-（2-氨基噻唑－4-基）－2-甲氧亚氨基乙酸为原料，经盐酸化、氯代等反应合成了Z-2-（2-氨基噻唑－4-基）－2-甲氧亚氨基乙酰氯盐酸盐；氯代时以用亚硫酰氯和N，N-二甲基甲酰胺的混合物代替五氯化磷作氯化剂，并考察了温度和溶剂对氯代产物中Z-异构体和E-异构体收率的影响。

The chlorinating mechanism of cerium dioxide was investigated by chlorinating CeO2 with NH4Cl and thermal analysis, which is meaningful for chlorinating RE minerals such as bastnasite by NH4Cl and preparing anhydrous RE chloride.

通过考察反应温度、时间及NH4Cl用量对CeO2氯化的影响以及CeCl3*7H2O的热分解行为的研究，对CeO2的氯化机制进行了探讨。

Tetrachloroterephthalic acid was prepared by chlorinating terephthalic acid, oleumsolvent and iodine catalyst. Tetrachloroterephthalic acid was acylated by sulphurous oxychloride in the presence of DMF to form tetrachloroterephthaloyl chloride. The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. The ester was reduced with potassium borohydride and lithium chloride to give tetrafluoroterephthalyl alcohol. The above product was bromated in the hydrobromic acid to obtain 4-bromomethyl-2,3,5,6-tetrafluoro-benzene methanol. 4-Methyl-2,3,5,-6-tetrafluorobenzene ethanol was obtained by reducing the bromide with magnesium. In the exist of DCC and DMAP, tefluthrin was got by the condensation reaction between 4-methyl-2,3,5,6-tetrafluoro-benzene methanol and-(1RS,3RS)- 3-(2- chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropanecar-boxylate acid.

对苯二甲酸与氯气在碘存在下以发烟硫酸为溶剂进行氯化制备四氯对苯二甲酸；再以DMF为催化剂与二氯亚砜反应生成四氯对苯二甲酰氯；以氟化钾为氟化剂，环丁砜为溶剂置换氟化，再与甲醇酯化得到四氟对苯二甲酸甲酯；以KBH4-LiCl为还原剂二甲醚为溶剂反应制得四氟对苯二甲基苄醇；以氯苯为溶剂在溴化氢溶液中溴化得到溴化产物；在乙醇溶液中经镁粉还原得到4-甲基-2，3，5，6-四氟苄醇；甲基苄醇与功夫酸在催化剂二环己基碳二亚胺和4-二甲氨基吡啶作用下缩合得到七氟菊酯，总收率达43.6%。

In the reaction, industrial chlorinating agent and brominating agent with low cost and easy acquisition are used as oxidants to oxidize the ethyl lactate into the ethyl pyruvate.

反应中使用了廉价易得的工业用氯化剂、溴化剂作为氧化剂，将乳酸乙酯氧化为丙酮酸乙酯。

The results show that the graft copolymer obtained by in-situ chlorinating has good properties.

其接枝共聚物与相同氯含量的CPE相比，在力学性能方面有显著提高。

It is found that chlorinating metals will decreasd DC offset voltage and AC impedance,and improve electrical properties.

研究发现：将金属材料氯化可以降低电极对的直流失调电压和交流阻抗，改善电极的电性能。

Higher oxidation and chlorinating ability of MFA resulted in increasing toxicity equivalence quantity of PCDDs/Fs, and the effect of chlorinating ability was more evident.

无论是模拟飞灰氧化性的增强或者氯化性的增强，生成的二恶英的毒性当量都有所增加，但是后者的作用更为显著。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失