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The proper hydrolysis reaction temperature of benzal chloride was 1000C and the initial quality rate of water phase and organic phase was 2∶1,reaction time was 3 hours.

苄叉二氯的水解方法已经有很多报道[1,2],主要的方法有酸性水解法、碱性水解法、酸碱联合水解法和催化水解法。

The study on the technology and kinetics of chlorination of benzyl chloride is rather essential to the design of reactive distillation column in that the new technology about combination of reaction and distillation is used in the production of benzal chloride.

因为拟采用新型反应精馏耦合技术进行苄叉二氯的生产,研究氯化苄氯化工艺和动力学对于反应精馏塔的设计很有必要。

The simplified peseudo-first-order kinetic model for hydrolyzation of benzal chloride was proposed according to the character of hydrolyzation reaction and the apparent reaction rate constant and activity energy was obtained. The activity energy is 17.73KJ/mol in the temperature range from 900C to 1100C and the model values and experimental values tally well.

根据水解反应的特点,提出了简化的苄叉二氯水解反应拟一级动力学模型,经参数估计,得出了水解反应的宏观反应速率常数和活化能,在900C~1100C温度范围内,反应活化能为E1=17.73kJ/mol,模型计算值与实验值吻合较好。

The procedure of benzal chloride and benzylchloride was obtained by chlorination toluene, then through catalytic acidic hydrolysis and oxidation, produced benzaldehyde.

本文研究了甲苯氯化得到苄叉二氯和氯化苄混合物,然后经催化酸解氧化制备苯甲醛,并探讨了氯化催化酸解及氧化的反应条件。

It was at 690 nm in Undaria pinnatifida,Dictyopteris divaricata,Laminaria japonica,Colpomenia sinuosa and at 705-720 nm in Sargassum confusum,Sargassum thunbergii,Scytosiphon lomentarius, Ectocarpus confervoides.

按荧光主峰的波长,可以分为二种类型:裙带菜、叉开网地藻、海带和囊藻的荧光主峰位于690 nm,海蒿子、萱藻、水云和鼠尾藻的荧光主峰在705-720 nm。

Stamens 4, distinctly didynamous, inserted on basal part of corolla tube, usually included, sometimes slightly exserted; anthers divaricate, opening by longitudinal slits.

雄蕊4,清楚二强雄蕊,基部花冠筒深裂的着生于,通常包括,有时稍外露;通过纵裂缝极叉开,开阔的的花药。

This protocol could also be used for the selective reduction of the endocyclic double bond of the 3-electron withdrawing group substituted coumarins. This method is clean, mild, and efficient.2 ZrCl_4 / HEH was found to be a selective and efficient reagent combination for the direct reductive amination of electron rich aldehydes and ketones with weakly basic amines after scanning various catalysts such as InCl_3, BiCl_3, CF_3COOH and so on.

图一 1。我们用汉斯酯作为有机还原剂,乙醇为溶剂,实现了4-甲叉基噁嗯唑酮和吡唑酮环外双键的高选择性还原;此外,我们还将这一还原体系用于3-吸电子集团取代-3,4-二氢香豆素环内双键的选择性还原。

A new corrosion-scale inhibitor composed of citric acid/hydroxy ethylidene diphosphonic acid/polyitaconic acid-styrene sulfonic acid copolymer exhibited a good inhibition efficiency on corrosion and scale-forming, it can be used in circulating cooling water systems.

新型缓蚀阻垢剂柠檬酸/羟基乙叉二膦酸/聚衣康酸-苯乙烯磺酸有优良的抗腐蚀性能和阻垢性能,可用于循环冷却水系统。

Then the protected D-mannitol, mixed with lead tetraacetate, hippuric and acetic anhydride, were refluxed in THF for 18 h in a one-pot two step reaction to afford a chiral precursor-2-phenyl-4-[-2,3-O-]-propylidene-5(4H)-oxazolones.

产物与四乙酸铅、马尿酸、乙酐于THF中回流18 h完成一釜二步反应,纯化后得到含有手性碳原子的环丙烷氨基酸前体-2 苯基-4-[-2,3-O-]丙叉?

In this paper's LOD algorithm.

在本文的LOD算法中,四叉树信息被保存在一个二维数组中,而不是传统的链式结构。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。