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The phosphine and arsine absorb the ultraviolet light much more strongly than does silane, causing them to be deposited out on the walls of the container.

磷化氢和砷化三氢对紫外光的吸收比硅烷强烈得多,因此,它们就沉积在容器的器壁上。

Transmission Electron Microscope and other properties testing results show that the complex emulsifier system is the crucial influence factor of the polymerization process and the properties of products. It may influence the coagulum content and reaction rate of the polymerization process, the performance, particle diameter,viscosity, electrolyte stability and storage stability of the emulsion products and the contact angle of the film.The initiator mainly influences the coagulum content and reaction rate.The acrylic monomers mainly influence the solid content, Minimum Film Formation Temperature of the emulsion and the Glass Transition Temperature of the film.The organic silicone monomer mainly influences the water absorption of the film.The reaction temperature mainly influences the reaction rate and conversion.The stirring intensity mainly influences the coagulum content of the polymerization process.

透射电镜等性能测试结果显示:复合乳化剂体系是硅丙共聚乳液的聚合过程及产品性能的主要影响因素,它可以对聚合过程的凝胶率、反应速率以及乳液的外观、粒径、粘度、耐电解质稳定性及贮存稳定性,还有乳液涂膜的接触角等造成不同程度的影响;引发剂主要影响反应速率和凝胶率;丙烯酸酯单体主要影响到乳液的固含量、最低成膜温度以及涂膜的玻璃化转变温度,有机硅单体主要影响涂膜的吸水率等;聚合反应温度主要影响乳液的反应速率和转化率等;搅拌强度主要是影响到聚合过程的凝胶率。

In this paper,the ketalization of cyclohexanone and ethylene glycol catalyzed by dealuminated USY was studied.

研究了脱铝超稳Y沸石催化环己酮与乙二醇的缩酮化反应,考察了催化剂硅铝比、催化剂用量、反应物配比、带水剂和反应时间等对缩酮化反应的影响。

Hydrogenated amorphous silicon nitride films have been deposited by helicon wave plasma enhanced chemical vapor deposition, the effect of SiH4/N2 rate on the properties of the samples is systematically studied, and the critical experiment condition is obtained under which a-SiNx:H films with different compositions are deposited.

本工作采用螺旋波等离子体化学气相沉积方法制备了氢化非晶氮化硅薄膜,系统地研究了不同反应气体配比对薄膜特性的影响,得到了沉积不同组分a-SiN_x:H的典型实验条件。

The conclusion was drawn by the synthesis of molecular sieve: after mixed soluble glass and aluminium sulfate with proper proportion under room temperature, it was stirred stormily to react. And then we mixed with potassium hydroxide solution after filtrating. At last, the molecular sieves of potassium type was synthesized after the mixture reacted in the oven or autoclave for 24 hours. The molecular sieve was remodeled more than twice with ammonium chloride solution that the concentration was 3mol/L and then remodeled twice with the saturated sodium chloride solution. Finally the molecular sieve was changed into the sodium type. It was named W zeolite.

通过对分子筛的合成得到:以泡花碱、硫酸铝为原料,以硅铝比按一定比例于室温下将二者混合,激烈搅拌,抽滤后与氢氧化钾溶液混合放于烘箱或高压釜中高温晶化24小时,晶化后的分子筛为钾型,先后用3mol/L氯化铵溶液和饱和食盐水各对其改型两次以上,最后改为钠型,可制得W型沸石分子筛。

Liquid-phase epoxidation of allyl chloride with hydrogen peroxide was carried out over Ti-MWW, a novel titanosilicate with the MWW structure, to synthesize epichiorohydrin selectively and effectively. Ti-MWW proved to be superior to the conventional TS-1 catalyst in both catalytic activity and product selectivity. Ti-MWW prefers aprotic solvents of acetone and acetonitrile, both of which can restrain the solvolysis of epichiorohydrin, whereas TS-1 favors a protic solvent of methanol.

研究了具有MWW结构的新一代钛硅分子筛Ti-MWW催化剂对烯丙基氯液相环氧化高效合成环氧氯丙烷的催化性能结果表明,Ti-MWW的催化活性以及产物选择性均优于传统的钛硅分子筛TS-1,对于Ti-MWW,合适的溶剂为非质子性溶剂丙酮和乙腈,在该溶剂中环氧化物不易发生溶剂化开环反应;而对于TS-1,合适的溶剂是质子性溶剂甲醇,但甲醇可导致醇醚副产物的生成。

Via comprehensive computations, the possibilities of vinylidene and allene intermediates were excluded, and the reaction mechanism was found to contain the following three steps:(1) gold-catalyzed cyclization to give the cyclic intermediate,(2) the cyclic intermediate undergoing a 1,3-H migration to give a more stable intermediate, with the assistance of water-cluster,(3) finially, the 1,2-H or 1,2-silyl migration occuring for generation of the observed product.

通过对各种可能的反应路径的进行计算和比较,排除了亚甲基卡宾和连二烯中间体的可能性,并确定该异构化反应机理包含以下三个步骤:(1)炔丙基吡啶反应在金催化条件下发生分子内的成环得到环状中间体;(2)环状中间体在水分子簇的协助下优先发生1,3-氢迁移反应,异构化得到更为稳定的中间体;(3)最后再进行1,2-氢迁移或是1,2-硅烷基团迁移即得到实验中所观察到的环异构化产物。

Studies on Acetalization of Litsea Cubeba Oil with Glycol Catalyzed by Dealuminated USY;3. on the esterification and acetalization reactions was discussed.

通过酯化反应和缩醛化反应,考察了含硅二烃基锡二芳香羧酸酯在有机反应中的催化活性,讨论了催化剂用量、反应时间和溶剂等因素对催化反应的影响。

This dissertation concentrated on its low-cost synthesis, adjusting of silica to alumina molar ratio and catalytic applications in olefinic alkylation of thiophenic sulfur of simulated FCC gasoline and aromatization of butene in liquefied-petroleum-gas process.

本论文旨在降低MCM-22合成成本,获得硅铝比范围宽泛可调的MCM-22,并拓展其在烯烃烷基化脱硫与液化气丁烯芳构化方面的应用。

That 1,4-addition reactions of Grignard agent made from 1-bromo-3-triphenylmethoxyl-1-octene and organozinc agent made from 1-iodo-3-trimethysiloxy-1-octene with 2-(6-methoxylcarbonylhexyl)-4-(2- tetrahydro-pyranyloxy)-2-cyclopentenone both gave prostaglandin 〓 methyl ester statethat prostaglandin E compounds can be prepared by 1,4-addition reaction oforganozinc agent.

最后,研究了溴化-3-三苯甲氧基-1-辛烯基镁和碘化-3-三甲硅氧基-1-辛烯基锌与2-(6-甲氧羰己基)-4-(2-四氢吡喃氧基)-2-环戊烯酮通过1,4-加成反应合成〓甲酯的方法,结果表明,用有机锌试剂通过1,4-加成反应来合成PGE类化合物是可行的。

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