乙烷

Accordingly a further feature of the invention is a combined process wherein a dialkyl phenylethylmalonate is made from an alkyl phenylacetate and a dialkyl carbonate by a process comprising adding to a quantity of sodium which is covered with a hydrocarbon solvent boiling above 100°C, at least a chemically equivalent proportion of a lower aliphatic alcohol, subsequently adding an approximately equivalent proportion of a dialkyl carbonate and of an alkyl phenylacetate, heating the mixture to induce reaction and continuously distilling out the alcohol formed from the reaction zone and finally causing the sodio diethyl phenylmalonate so obtained to interact with an ethylating agent, such as ethyl halide, diethyl sulphate of ethyl p-toluene-sulphonate.

因此，本发明的另一个应用是一个组合工艺过程：二烷基苯基乙基丙二酸酯由烷基乙酸苯酯和二烷基碳酸酯得到，具体工艺过程是：向覆盖有沸点超过一百摄氏度的团庆化合物溶剂的金属钠中添加至少化学平衡的低级脂肪族醇，然后加入大约相同当量的二烷基碳酸酯和烷基乙酸苯酯，加热混合物引导反应进行，持续蒸馏把形成的醇类从反应区域移出，最后使获得的二乙基苯基丙二酸酯和乙基化试剂如卤代乙烷，二乙基硫酸酯形成乙基p-甲苯磺酸酯。

LY series desulfurizers are synthesized by sterically hindered fatty amine, ethylene oxide andpropylene oxide, which is a ring-splitting polymerization reaction at the catalysts.

采用带有空间位阻基团的脂肪胺在催化剂的作用下与环氧丙烷和环氧乙烷开环聚合，合成LY系列脱硫剂。

In the process of the sulphonate reaction, we use 1,2-dichloroethane as solvent and chlorosulfonic acid as the agent of sulfonation.

环化反应采用1，2-二氯乙烷作溶剂，用氯磺酸作磺化剂，在回流温度下进行磺化反应，3-十二烷基蒽醌磺酸的收率为85.75%。

His paper deals with the purification of tetrabromoethane by continuous countercurrent scrub-bing with annular centrfugal extractor.

研究了离心萃取器的转速和重相堰直径在四溴乙烷一水体系中对洗涤效果的影响，并得到了优化参数。

Volatile organic substances containing chlorine: tetracarp, carbon tetrachloride , trichloroethylene , chloroform, tetrachloroethane and etc.

挥发性含氯有机物：四氯乙烯、四氯化碳、三氯乙烯、氯仿、四氯乙烷等。

Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane ,trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

利用静电纺丝法制备聚酯纳米纤维，选择苯酚和四氯乙烷，三氟乙酸，三氟乙酸和二氯甲烷3种溶剂分别溶解PET切片进行静电纺丝，通过扫描电子显微镜对纤维表面形态进行观察，结果表明：三氟乙酸和二氯甲烷混合溶剂溶解PET制备的电纺纤维较好。

Preparation of trifluoroacetaldehyde and trifluoroacetic acid by trifluoroethanol catalytic oxidation;2. Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane, trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

利用静电纺丝法制备聚酯纳米纤维，选择苯酚和四氯乙烷，三氟乙酸，三氟乙酸和二氯甲烷3种溶剂分别溶解PET切片进行静电纺丝，通过扫描电子显微镜对纤维表面形态进行观察，结果表明：三氟乙酸和二氯甲烷混合溶剂溶解PET制备的电纺纤维较好。

Diaminoalkanes react with sym - tetrachloroethane to give crystaline 2,2'- Bis -( hexahydropy-rimidine) derivatives 1 - 5, after treatment with aqua ammonia.

利用均四氯乙烷及二氯甲烷的胺化反应，合成了联氢化嘧啶衍生物1～5，4a，8b-反-4，5，8a，9a-四氮杂全氢芴(6)和8b，8c-顺-3a，4a，7a，8a-四氮杂环戊并全氢芴(7)。

The nano-silica partrcles are organic-modified by E-MA-GMA elastomer through direct solvent process,the organic-modify process mechanism was studied,and the dispersing of modified nano-silica particles in tetrachloroethane solvent and PBT were investigated.FIRT,TEM,SEM results indicated that the epoxy group of E-MA-GMA could react with the hydroxyl groups of silica surface,helped to reduce the interactions of nano-silica particles particles and improve the dispersion of nano-silica on PBT and the interfacia...

surface modification ；溶液法利用功能化弹性体E-MA-GMA对纳米二氧化硅进行表面有机化修饰改性，分析了表面改性过程机理，同时考察了改性后纳米二氧化硅在四氯乙烷溶剂和PBT基体中的分散情况；FIRT、TEM、SEM测试结果表明，E-MA-GMA的环氧基团与纳米SiO_2的—OH基团发生反应，降低纳米二氧化硅粒子间的相互作用力，改善了纳米二氧化硅在PBT基体中的分散，提高复合材料的相容性。

We studied chemical reaction between nitrogen oxides with dichloromethane, trichloromethane, tetrachloromethane and 1, 2-dichloroethane by Laser Magnetic Resonance.

用激光磁共振方法研究二氯甲烷、三氯甲烷、四氯甲烷、1，2-二氯乙烷与氮氧化物在火花放电、紫外光照射条件下的化学反应。

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。