ring-closure reaction

On the basis of some industrial tests on DOP production line imported from BASF of Germany, and technological analysis in theory, a high effective regular packing was used in the reaction distillation tower instead of Pall ring packing.

在对国外引进装置进行工业试验，并从理论上进行技术分析基础上，应用高效规整填料塔技术对装置核心设备&酯化精馏塔进行了改造，同时对附属设备进行更换和完善。

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Study on the Mechanism and Reaction Kinetics of Ring Forming in the Grate-Rotary Kiln

链篦机&回转窑结圈机理及其反应动力学研究

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Using potassium titanium oxalate as raw material, ring-like TiO2-aggregates film deposited on the glass substrate was successfully synthesized by hydrothermal method though a bubble template strategy and ligand exchanging reaction.

采用水热法，以草酸钛钾为反应原料，借助气泡模板和配体交换反应，在玻璃基底上成功沉积了环状的Ti02聚集体薄膜。

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The calculated results show that the aza Wittig reaction is a two step reaction, having one four membered ring intermediate on its reaction surface.

计算结果表明该反应是一个二步反应，在反应途径上存在一个四元环中间体。

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The key steps of hydrocracking of tetralin, the conversion of double ring compounds and the yields of mono-ring compounds were affected by the reaction temperature and the acidity of two catalysts.

四氢萘加氢裂化反应的关键步骤和双环化合物裂解的转化率以及单环化合物的产率与两种催化剂担体的酸性及反应温度有关。

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The reactor with the compression-type structure is mainly composed by the base, the reaction cell plate, slide, rubber ring and screwing cap.

该反应器采用压装式结构，主要由基座、反应池板、玻片、橡胶圈和旋盖组成。

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Because it has shown a pleased result in many kinds of precipitation reaction such as ring precipitation reaction, agar diffusion reaction and so on.

结果：自制兔抗羊免疫血清和羊血清经环状沉淀、琼脂扩散多种沉淀反应试验，验证均与兔抗人血清和人血清的反应结果相近。

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Molecular rearrangement reaction was observed during the heat treatment and the formation of hexahydric imide ring was identified.

在发泡和后处理过程中分子链发生重排反应，生成六元酰亚胺环。

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The further reaction between remaining broken ring cluster and strongly alkaline solution depends on the types of the remaining broken ring clusters and alkaline solutions.

偏高岭土溶解后的残环和碱溶液进一步反应与残环及碱溶液的种类有关。

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The treatise advances a new method to judge two kinds of fixed group of benzoic ring on electrophilic substitutive reaction in benzoic ring.

对苯环上的亲电取代反应提出一种判断苯环上两类定位基的新方法。

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