乙烷

In this paper,the advantages of a new type of bromine flame retardant decabromodiphenylethane are introduced.

介绍了新型高效溴系阻燃剂十溴二苯乙烷的突出优点，介绍了我国十溴二苯乙烷的生产方法和现状，讨论了国内十溴二苯乙烷的研究及应用研究情况，展望了十溴二苯乙烷的发展前景。

Methods: The twelve volatile halogenated hydrocarbons (1, 1-dichloroethene, dicloromethane, trans-1, 2-dichloroethene, cis-1, 2-dichloroethene, chloroform-1, 1, 1-trichloroethane-1, 2-dichloroethane, tetrachloromethane, bromodichloromethane, dibromochloromethane, tetrachloroentene and bromoform) in drinking water were determined by headspace capillary gas chromatography.

采用顶空毛细管柱气相色谱法测定饮用水中1，1-二氯乙烯、二氯甲烷、反－1，2-二氯乙烯、顺－1，2-二氯乙烯、三氯甲烷、1，1，1-三氯乙烷、1，2-二氯乙烷、四氯化碳、一溴二氯甲烷、二溴一氯甲烷、四氯乙烯及三溴甲烷等12种挥发性卤代有机物。

With half-trace law instead of constant law,bromine ethane not iodine ethane reacts to carbolic acid sodium in order to make benzene ether.

以半微量法代替常量法，用溴乙烷代替碘乙烷与苯酚钠反应制取苯乙醚。

After the DHX process was used on the light hydrocarbon unit to recover C3(superscript +) compound, it had a good result that the recovery rate of C2 compound was higher in the same operation conditions. And the liquid ethane could be used as the cryogen and absorbent to increase the recovery rate of C3(superscript +) compound and decrease the energy cost greatly at the same time.

以回收C3为目的轻烃装置采用DHX工艺（DHX塔闪蒸+脱乙烷塔分馏）后，在相同工况下能使C2获得更高冷凝率，并通过液态乙烷的制冷剂和吸收剂作用使C3收率大幅提高，达到节能降耗的同时也提高了C3收率。

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。

In this way, rare earth lanthanum could seriously inhibit the adsorption of ethane on the carbon surface.

由于稀土对乙烷吸附量极小，从而极大抑制了活性炭载体对乙烷的物理吸附，这是此复合吸附剂提高乙烯乙烷分离性能的主要原因。

In this incident, viscose and 309 yellow gum, which are used in the shoemaking post includes highly concentrated 1,2-dichloroethane, and air 1,2-dichloroethane densities surpasses the national health limit value, combined with the clinical manifestation, this event can be confirmed as the suspected incident of acute occupational poisoning induced by 1,2-dichloroethane.

该次事件中掹鞋岗位使用的散装港宝水、309黄胶中含高浓度1，2-二氯乙烷，掹鞋岗位空气中1，2-二氯乙烷浓度超过国家卫生限值规定，结合临床表现，可以确认该起事件为疑似职业性急性1，2-二氯乙烷中毒事件。

The main pollutants from this chemical plant is perchloroethane, pentachloroethane, hexachlorobutadiene and HCB, and such pollutants are present in the soil with high densities, some as high as 1%- 95%, of which the perchloroethane is near the purity of the corresponding product, and especially this part of the soil contains comparatively high-density persistent organic pollutant HCB, which makes it suitable to be disposed of together with other soils. Therefore it is suggest that this part of soil should be separately dug out and transported outside of the site.

化工厂的主要污染物质是六氯乙烷、五氯乙烷、六氯丁二烯和六氯苯，土壤中上述污染物的浓度非常高，有些达到1%至95%，其中六氯乙烷接近相应的产品的纯度，特别是这一部分含有较高浓度的持久性有机污染物六氯苯，不利于与其它土壤混合处理，建议将这一部分单独开挖出来并运出场外。

It is discussed that how the preparation methods of the catalyst for trichloroethylene by dehydrochlorination from tetrachloroethane ,the reactor materials,ferric chloride,the impurity 1,1,2-trichloroethane and the high boilers contained in raw material tetrachloroethane and the operating conditions influence the catalyst.

探讨了四氯乙烷脱氯化氢制三氯乙烯所用催化剂的制备方法、反应器材质、氯化铁、原料四氯乙烷中的杂质1，1，2-三氯乙烷和高沸物及操作条件对催化剂的影响，从而指导四氯乙烷脱氯化氢制三氯乙烯的工业生产，提高催化剂的效率，延长催化剂的寿命，消除不利的影响因素，提高产品质量，降低生产成本，确保三氯乙烯生产的长期、稳定运行。

A new process for catalytic synthesis of decabromodiphenylethane was developed by brominating diphenylethane with bromine chloride and bromine solution to decrease bromine consumption and simplify post-treatment process.

当氯化溴/二苯乙烷摩尔比为10，溴/二苯乙烷摩尔比为15，反应时间为5h时得到十溴二苯乙烷的收率98.4%，产品平均溴代数9.8，产品中溴含量81.0%，产品中氯含量0.9%。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。