四氯乙烯

The outlets of methane tetrachloride produced in the production facilities of chloromethane in China at present were proposed,such as conversion to diphenyl ketone ,ethylene tetrachloride,cinnamic acid,trichloroacetyl chloride,methane chloride and chloroform.

提出了目前我国氯甲烷生产装置副产的四氯化碳的出路：转化成二苯甲酮、四氯乙烯、肉桂酸、三氯乙酰氯、一氯甲烷、氯仿。

In the best condition of headspace and chromatogram, the mensuration of aquatic trace volatile can get a satisfaction result such as chloroform , carbon tetrachloride , trichloroethylene and perchlorethylene, all relativity standard deviation RSD is less than 4%,all the correlation coefficient R is larger than 0.99, and the relative error is less than 3%.

在选择最佳的顶空和色谱条件下，测定水中痕量挥发物三氯甲烷，四氯化碳，三氯乙烯和四氯乙烯可获得令人满意的结果，相对标准偏差RSD均小于4%，相关系数R均大于0.99，相对误差小于3%。

These solvent vapor degreasers meet recentEPA and NESHAP guidelines for use with trichloroethylene and perchloroethylene.

这些溶剂汽油去污设备的达到了最近新出台的EPA和NESHAP对三氯乙烯和四氯乙烯的使用准则。

The detection limit was 10 times better than the conventional SPME method. Under the optimized analytical conditions, aqueous samples of trichloroethylene/perchloroethylene (20 μg/L) and benzene/toluene (10 μg/L) were analyzed. The δ13C fractionation compared to pure-phase and headspace analysis was less than 0.5‰.

在优化的条件下，对20 μg/L的三氯乙烯/四氯乙烯和10 μg/L的苯/甲苯水溶液进行了单体碳同位素分析，相比于纯溶剂碳同位素值，顶空同位素分析误差不超过0.5‰，而样本标准偏差为0.3‰。

The measurement shows that 310.8 nm is the suitable wavelength for detection of trichloroethylene and 322.5 nm is the suitable wavelength for detection of tetrachloroethylene in this wavelength range.

研究表明，该波长范围内三氯乙烯的最佳检测波长为310.8 nm，四氯乙烯的最佳检测波长为322.5 nm。

The model preferably predicted the photocatalytic degradation of other compounds, such as trichloroethylene, tetrachloroethylene, p -di chlorobeneze and carbon tetrachloride.

模型较好地预测了其他化合物如三氯乙烯(TCE、四氯乙烯、对-二氯苯和四氯化碳的光催化降解。

The objective of this study is to study the kinetic parameters of surfactant-enhanced permanganate oxidation of tetrachloroethylene, and then compared them with the parameters of trichloroethylene studied in other literatures.

本研究主要目的为利用界面活性剂配合过锰酸钾降解水中之四氯乙烯(tetrachloroethylene， PCE)，以求得PCE之相关动力参数，再与文献中三氯乙烯(trichloroethylene， TCE)之动力参数做比较。

Organic chlorine compounds, including hexachlorethane , pentalin , hexachlorobutadiene, HCB, pentachlorobenzene, dioxin, gammexane, tetracarp, carbon tetrachloride , chloroform and etc.

有机氯化合物，包括六氯乙烷、五氯乙烷、六氯丁二烯、六氯苯、五氯苯、二恶英、六六六、四氯乙烯、四氯化碳和氯仿等污染物。

Methanol hydrochlorinate has two steps: one is to produce monochloro methane by methanol hydrochlorinate reaction and the other is to make monochloro methane produce polychlorinated methane.

二硫化碳法、氯油法和乙醛法因不经济和环保问题在国外已被淘汰；C1一C3废氯烃全氯化法是利用氯乙烯等装置的副产废料生产四氯化碳并联产四氯乙烯，该法是一种非常经济的工艺，在国外曾被十分广泛地采用，但随着发达国家四氯化碳的停止使用，目前大部分基于该工艺的装置被迫停产。

White gas, banana oil, Thinner, Coating thinner, Paint thinner, toluene, xylene, acetone, ethane, heptane, carbinol, MEK, IPA, trichloroethylene ,Tetrachloroethylene , ethyl alcohol

白电油、香蕉水、天那水、涂料稀释剂漆油稀释剂甲苯二甲苯丙酮乙烷庚烷甲醇丁酮异丙醇三氯乙烯四氯乙烯酒精等有机溶济。

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。