• 本文研究对甲苯磺酸催化剂氯苯为溶剂,室温附近的条件下,苯酚对叔丁基酚与甲反应动力学

    With p-toluene sulfonic acid used as catalyst and chlorobenzene as organic solvent, the reaction kinetics between phenol and acetal have been studied at room temperature.

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  • 氟化催化下,芳香乙酸乙酯发生克脑文格尔缩合反应,得到高产缩合产物

    The knoevenagel condensation of aromatic aldehydes with ethyl cyanoacetate proceeds smoothly in the presence of potassium fluoride giving products in high yield.

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  • 系统研究了脂肪甲芳香芳香胺参与的尼奇反应

    Mannich reactions with aromatic, aromatic ketones and aromatic aldehydes and their applications were studied systematically.

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  • 本文着重介绍了锯末刨花板价廉物美淀粉复合粘合剂制作的反应机理工艺流程配方等。

    Reaction mechanism, technological process, and formulation of a cheap starch and urea-formaldehyde compound adhesive for saw-dust and shaving boards are mainly described in this paper.

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  • 合成了一种季铵化反应树脂无固色剂het测定了该固色剂羊毛织物酸性g染色后的固效果

    Quaternized reactive formaldehyde-free color-fixing agent HET was synthesized, and its color fixation effect was tested for wool dyed with acid dye red g.

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  • 水溶液中,聚糖香草发生希夫反应,生成改性壳聚糖vcg

    Chitosan react with vanillin aldehyde by Schiff's base reaction in water, a polymer product-VCG can be prepared.

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  • 机理不同只有1,2加成方式聚乙烯醇饱和反应

    This mechanism is different from that for the acetalization reaction of polyvinyl alcohol with saturated aldehydes, which has only 1, 2 addition.

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  • 本文研究磺酸化聚苯乙烯树脂酯化酯交换合成的合成(口)呐重排反应中的应用

    This paper reports the study on the sulfonated polystyrene resin used in esterification, transesterification, synthesis of acetals or ketals, synthesis of ether and rearrangement reaction of pinacol.

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  • 探讨了合成羟基香茅反应条件

    The reaction conditions of synthesizing hydroxycitronellal have been explored.

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  • 反应在装有分馏反应器中进行的,分馏柱能让通过使回流反应器中。

    Reaction is carried out under a fractionating column that allows aldehyde to pass but returns alcohol to the reaction vessel .

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  • 由于丙烷稳定性活泼性,反应对催化剂要求苛刻,有关的研究并未取得重大的突破。

    However, due to the chemical stability of propane and the activity of acrolein, this reaction required a multiple functional catalyst and no great progress was made in this field.

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  • 通过一元羧酸乙烯反应,我们得到新颖结构分子玻璃

    A novel family of ester acetal molecular glass materials has been created by the reaction between monocarboxylic acid and divinyl ethers.

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  • 通过氧化反应可以由芳香族化合物得到羧酸重要有机中间体精细化学品

    Phenols, aldehydes, ketones, quinones, carboxylic acids and many other important organic intermediates for fine chemicals can be obtained by oxidizing aromatic compounds.

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  • 发光反应机理了简单的探讨,通过测试说明化学发光反应主要发生氧化一步

    The mechanism of such chemiluminescence is discussed in brief and is shown that the chemiluminescence occurs in the step of alcohol oxidized into aldehyde.

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  • 2-H苯并咪唑盐与烃基为不饱和取代基格利雅试剂的加成-水解反应进行了研究,将此反应应用不饱和制备

    The addition-hydrolysis reaction was applied to the synthesis of unsaturated aldehyde by the -reaction of 2-H benzimidazolium iodide with alkenyl magnesium bromide.

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  • 缩酶TNBS之间反应支持酶分子的氨基,尤其是缩酶的氨基维护天然构象中起着特殊作用的观点。

    The reactions between aldolase and TNBS suggest that the amino group or groups, in snake aldolase, may play a special role in maintaining its native conformation.

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  • 山苍子提取出柠檬硫酸羟胺反应生成脱水后可得到柠檬腈。

    Lemonile was manufactured by the dehydration of citral oxime obtained by the reaction of hydroxylamine sulfuride and citral abstracted from litsea cubeba oil.

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  • 实验结果表明磷酸钙主体催化剂裂解反应具有较高的活性选择性

    The results showed that the catalyst, with calcium phosphate as the main part, is active and selective in the splitting of acetal.

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  • 离子液体介质研究了三氯化铟催化缩酮反应

    Acetalization and ketalization reactions catalyzed by indium trichloride using various ionic liquids as media have been investigated in detail.

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  • 反应条件下乙二醇收率可达71.1%。

    Under these conditions, the yield of butyraldehyde glycol acetal is 71.1%.

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  • 三聚氰胺未改进乙二基质的抗水剂,本身会发生聚合反应,会造成纸张质量负面影响

    The water-resistance agent with melamine and un-improved glyoxal as matrices has negative effects on the paper quality because of the polymerization potential of its own.

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  • 单质催化剂通过乙二醇反应合成了乙二醇

    Butyraldehyde glycol acetal was synthesized from butyraldehyde and glycol by using iodine as catalyst.

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  • 磷酸催化下,葡萄糖乙二醇经缩反应制备了乙二醇葡糖苷,可用化妆品保湿剂。

    Ethylene glycol glycosides, useful as humectant in cosmetics, were prepared by phosphoric acid-catalyzed acetalization of glucose with ethylene glycol.

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  • 酸性催化剂下,葡萄糖乙二醇经缩反应制备了乙二醇葡糖苷

    Glycol glucoside was prepared from glucose and ethylene glycol in the presence of acid catalyst.

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  • 此外,该区细胞也具有PAS阳性反应含有复红特异性染色颗粒

    The cells of the CMZ were positive for PAS and contained the glanulae stained by aldehyde - fuchsin in their cytoplasm.

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  • 此外,该区细胞也具有PAS阳性反应含有复红特异性染色颗粒

    The cells of the CMZ were positive for PAS and contained the glanulae stained by aldehyde - fuchsin in their cytoplasm.

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