环氧乙烷

In this disseration, the cationic ring open-polymerization mechanism of THF、 butylene oxide and ethylene oxide were studied on the basis of electronic microstructures by using quantum chemicl method.

本文选取四氢呋喃、环氧丁烷和环氧乙烷的阳离子开环聚合为研究对象，运用量子化学方法从微观层次上对烷氧基化开环聚合过程进行了较为全面的研究。

The analysis method for determination of trace ethylene dichloride was established in PrimaδB process mass spectrometer.

乙烯氧化制环氧乙烷生产过程是在银催化剂作用下，乙烯催化氧化生成环氧乙烷反应。

The progress in the catalytic ring-opening polymerization of ethylene oxide and propylene oxide is reviewed in this paper.

环氧乙烷和环氧丙烷的开环聚合产物在表面活性剂工业和聚氨酯工业得到了极为广泛的应用。

The methods and measures for improving the competition of domestic ethylene oxide in international market were pointed out.

本文对国内外环氧乙烷生产技术现状，发展动向，以及市场供需状况作了概要叙述，并指出了提高我国环氧乙烷国际市场竞争力的方法和措施。

Our country ethylene diamine mainly uses in producing the agricultural chemicals (woods manganese zinc, dithane Z-78, generation of woods amine and pesticide, weed killer, disinfectant), the surface active agent (lives geminate stearic acid amide, alkyl imidazole lin, double amide, with oxirane, epoxypropane synthesizes non-ionic surface active agent), the epoxy resin firming agent (polyamide resins, epoxy firming agent, hydroxyethyl ethylene diamine and so on), the wash assistant (ethylene diamine four ethanoic acid and sodium salt series chelating agents), medicine raw material (aminophylline, washes must be peaceful, nose eye only, deinsectization spirit and so on), water treatment medicinal preparation (ethylene diamine four methylene phosphonates, second grade trunk base ethylidene two phosphine acids), corrosion inhibitor dye fixing agent, photography materialFixing bath and oil dope and so on.

我国乙二胺主要用于生产农药（森锰锌、代森锌、代森胺及杀虫剂、除草剂、杀菌剂），表面活性剂（生成双硬脂酸酰胺，烷基咪唑啉、双酰胺，与环氧乙烷，环氧丙烷合成非离子表面活性剂），环氧树脂固化剂（聚酰胺树脂，环氧固化剂，羟乙基乙二胺等），洗涤助剂（乙二胺四乙酸及其钠盐系列螯合剂），医药原料（氨茶碱，洗必泰，鼻眼净，灭虫灵等），水处理剂（乙二胺四甲叉膦酸盐，乙脒基乙叉二膦酸），缓蚀剂染料固色剂，照相材料定影液及润滑油添加剂等。

It have been observed that oxonium ion reacted with water more easily than with THF. So water could be used as ceasing reagent to control the molecular weight of the polymer.

本文还对四氢呋喃、环氧丁烷和环氧乙烷阳离子开环聚合反应中，分子内尾咬、扩环这一典型的副反应进行了理论研究。

A colorimetric method for epoxides, based on the reaction of the oxirane group with picric acid, is reportedly more sensitive than the oxirane test and is not subject to the shortcomings mentioned.

据报导以环氧乙烷与苦味酸的反应为基础的一种测定环氧化物的比色法比环氧乙烷试验敏感，并不具有所提到的缺点。

Ethylene oxide resistance. Figure 4 compares the ethylene oxide resistance of unoccluded versus occluded spores of B. subtilis var. niger.

环氧乙烷耐受性：图4比较了封闭和未封闭的枯草杆菌黑色变种芽胞对环氧乙烷的耐受性。

AFTN demulsifiers of polyoxypropylene-polyoxyethylene amine ethers are synthesized from oxypropylene, oxyethylene and amine under a lower pressure less than 0.5 MPa and in the presence of the KOH catalyst, oxypropylene polymerizes at (130±5)℃ temperature, and oxyethylene polymerizes at (120±5)℃ temperature.

以伯胺为起始剂、氢氧化钾为催化剂，分别以环氧乙烷［开环聚合温度为(120±5)℃］和环氧丙烷［开环聚合温度为(130±5)℃］为单体，在0.5 MPa以下合成AFTN系列嵌段聚醚型破乳剂。

Their technology and process is basically similar to that used ethylene, the raw material for the oxygen in the silver catalyst, caused by methane or nitrogen stabilizer, the existence of inhibitors of chloride, ethylene oxide directly generate ethylene oxide and ethylene B N and further to certain substances in water than in the tubular reactor for generating hydration ethylene glycol, ethylene glycol solution through evaporation to mention thick, dehydration, fractionation be ethylene glycol and other by-products.

它们的工艺技术和工艺流程基本上相似，即采用乙烯、氧气为原料，在银催化剂、甲烷或氮气致稳剂、氯化物抑制剂存在下，乙烯直接氧化生成环氧乙烷，环氧乙烷进一步与水以一定物质的量比在管式反应器内进行水合反应生成乙二醇，乙二醇溶液经蒸发提浓、脱水、分馏得到乙二醇及其他副产品。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。