乙二醇

Nowadays, such metal as steel has been widely used as tube material, but the corrosiveness of secondary refrigerant to metal tube has negative effect on the long-term stability.

目前，钢材等金属材料由于其具有较高的热导率而被广泛地用作盘管材料，但乙二醇溶液对钢等金属的腐蚀性会对盘管工作的长期稳定性产生严重影响。

If water, glycol, brine, hot oil or ammonia water are used in system of central air conditioning or air channel system,do carry cryogen.

如中央空调体系或者风道体系中使用水、乙二醇、盐水、热油或者氨水作载冷剂。

In this paper,the ketalization of cyclohexanone and ethylene glycol catalyzed by dealuminated USY was studied.

研究了脱铝超稳Y沸石催化环己酮与乙二醇的缩酮化反应，考察了催化剂硅铝比、催化剂用量、反应物配比、带水剂和反应时间等对缩酮化反应的影响。

In the long process, there are many uncertain factors, such as catalyst deactivation and so on.

由于流程长且反应催化剂影响不易确定等因素，乙二醇生产过程的全流程模拟十分困难。

Removal of water vapor by use of a glycol dehydrator.

用乙二醇脱水器除去天然气中的水分。

Vitrification and devitrification tests of cryoprotectants demonstrated the feasibility of vitrification solution EDT.

在抗冻保护剂溶液的玻璃化与脱玻璃化试验中，证明了乙二醇、葡聚糖和海藻糖配制玻璃化溶液的可行性。

It's obviously that the polyethylene glycol 1000 as disperser can improve the disperstiveness of BST powder in water.

使用聚乙二醇1000作为分散剂，可以使BST粉体的ζ电位由-9.61改变为-31.46，大大改善BST粉体在水中的分散性。

The results show that the distillate temperature of DLLA is lowed by the addition of diluent ethylene glycol, and the carbonization phenomenon can be avoided, which increases the yield of DLLA from 36.8% to 51.3%.

研究结果表明，在反应体系中加入乙二醇作为稀释剂，能降低DLLA的馏出温度，避免了DLLA在蒸馏过程中产生炭化现象，并使DLLA的平均产率由36.8%提高至51.3%。

The affections on the yield of DLLA caused by catalyst, temperature and time etc. were studied. By using ethylene glycol as diluent, the distillate temperature of DLLA was lowed and the carbonization phenomenon could be avoided, which caused the yield of DLLA increasing from 36.8% to 51.3%. The molecular weight of PDLLA prepared by this method could reach 184,000. DLLA and PDLLA was characterized and analyzed by DSC, XRD and IR.The key of direct method to synthesize PDLLA is the exclusion of H2O from reaction system.

丙交酯开环聚合制备PDLLA的关键在于中间体D，L-丙交酯的制备，研究了催化剂、反应温度、反应时间等因素对DLLA产率的影响，通过在反应体系中加入稀释剂乙二醇，DLLA的馏出温度明显降低，避免了DLLA在蒸馏过程中产生碳化现象，并使DLLA的平均产率由36.8％提高至51.3％，制备的PDLLA分子量最大值达18.4万。

The risk assessment for epoxyethane /glycol plant of Maoming Petrochemical Ethylene Industrial Comˉpany was carried out by utilized the risk assessment proceˉdure of risk index method of fire and explosion of Dow Chemical Company,and improvement measures are sugˉgested.

利用道化学公司火灾爆炸危险指数法安全风险评价程序对茂名石化乙烯公司环氧乙烷/乙二醇装置进行了安全评价，并提出了改进措施。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。