乙二醇

We perennially deal in PEG, MPEG, Ethyleneamines and the ramification of Ethyleneamines, NP,OP, AEO, specialty surfactants(2A1, CF-10), DOW CORNING antifoam, PE Homopolymer, HEC, latex compounds for the carpet and rug, etc.

我司常年经销产品：聚乙二醇及甲氧基聚乙二醇系列、乙烯胺系列及其衍生物、烷基酚聚氧乙烯醚、脂肪醇聚氧乙烯醚、二苯醚二磺酸盐（2A1）、X-405、CF-10等表面活性剂、道康宁消泡剂、羟乙基纤维素、地毯胶等。

Water、alcohol denat.、glycerin、butylene glycol、alanine、sucrose、urea、peg-60 hydrogenated castor oil、triethanolamine、allantoin、limonene、hamamelis virginiana extract、linalool、menthoxypropanediol、propylene glycol、alpha-isomethyl ionone、aspartic acid、acrylates/c10-30 alkyl acrylate crosspolymer、bisabolol、citronellol、fructose、glucose、glutamic acid、hexylene glycol、dextrin、hexyl nicotinate、fragranceparfum

水、双丙甘醇、变性乙醇、甘油、聚乙二醇-75、丁二醇、麦芽糖醇、PEG-60氢化蓖麻油、透明质酸钠、聚山梨醇酯-20、杏汁、乙醇、乳酸菌/梨汁发酵过滤液、磷酸氢二钠、乙基葡糖苷、羟丙基甲基纤维素、磷酸钾、黄原胶、豆瓣菜提取物、EDTA二钠、香精、茶叶提取物、苯氧乙醇。

In this paper poly and monomethoxypoly with different molecular weight were used as raw material.

本论文通过不同的合成方法，利用不同分子量的聚乙二醇和甲氧基聚乙二醇为原料，制备了不同类型的聚乙二醇衍生物。

The polyesters with terminal hydroxyl groups were prepared by condensation polymerization of adipic acid with 1,4-butanediol or ethylene glycol and, in some cases, a little amount of propylene glycol. The polyurethane thermoplastics were then prepared with the polyester, 4,4'-diphenylmethane diisocyanate and 1,4-butanediol.

采用己二酸、乙二醇(或加入少量1，2-丙二醇)和1，4-丁二醇制备了端羟基聚酯，并用该聚酯和4，4'-二苯基甲烷二异氰酸酯、1，4-丁二醇制备了聚酯型热塑性聚氨酯；考察了NCO/OH值、聚酯分子量等因素对热塑性聚氨酯的物理机械性能的影响。

Polyester polyol which was used for polyurethane hot melt adhesives was synthesized by the condensation polymerization of adipic acid and ethanediol, butanediol, hexanediol.

以己二酸、乙二醇、丁二醇、己二醇为原料进行酯化、缩聚反应，以钛酸丁酯为催化剂，采用阶梯式升温方式，合成了聚氨酯热熔胶用已二酸系聚酯多元醇；考察了醇酸摩尔比、催化剂种类和用量以及反应条件对酯化、缩聚反应的影响。

Diethylene gly- col butylmethyl ether was synthesized through the Williamson reaction between butyl bro- mide (n-C_4 H_9 Br) and CH_3 OCH_2 CH_2OCH_2 CH_2 ONa.

通过正溴丁烷与二乙二醇单甲醚钠的Williamson反应合成了二乙二醇甲基丁基醚。

The solvents commonly used in the solvothermal synthesis include alcohols (such as methanol, ethanol, isopropanol, alcohol, ethylene glycol, glycerine, etc.), amines (such as hexamethylenediamine, dimethylformamide, triethanolamine), Acetonitrile and Propionitrile, the differences of functional groups, varieties of kinds together with a wide differences of polarity, dielectric constant and boiling point of organic solvents greatly increase the diversities of the product.

溶剂热合成常用的溶剂有醇类(如甲醇、乙醇、异丙醇、正丁醇、乙二醇、甘油等)，胺类(如己二胺、二甲基甲酰胺、乙醇胺)，乙腈和丙腈等，有机溶剂由于带有不同的官能团，种类繁多，具有不同的极性、介电常数、沸点等，大大增加了合成产物的多样性。

The result showed that the thermal decomposition temperature of chlorinated paraffin reached 133℃ by adding 0.3% composite stabilizer in which the weight percentages of ethylene glycol diglycidyl ether, methyl stannic, triphenyl phosphate, exoxidized soybean oil were 72%, 3%, 10%, 15%, respectively. It is 15℃ more than that of using pure ethylene glycol diglycidyl ether.

结果表明：当复合稳定剂中乙二醇二缩水甘油醚、甲基锡、亚磷酸三苯酯、环氧大豆油的质量分数分别为72%，3%，10%，15%，复合稳定剂的添加量为氯化石蜡的0.3%时，氯化石蜡的热分解温度为133℃，比单独使用乙二醇二缩水甘油醚提高了15℃，热稳定效果较好。

In comparison with the anaerobic batch fermentation of 1,3-propanediol from saponified glycerol, the bioprocess of two successive microbial fermentations for the production of 1,3-propanediol was feasible. The yield of 1,3-propanedio was higher than that of 1,3-propanediol directly from saponified glycero with 15 h in the two-stage fermentation in a 18h batch fermentation.

玉米淀粉。微生物发酵1，3一丙二醇(1，3-propanediol，简称1，3一PD)是一种重要的化工原料，与乙二醇、l，2一丙二醇和1，4一丁二醇有着相似的性质和用途，但又有许多其他二醇所不具备的优点，尤其是1，3-PD与对苯二甲酸合成的新型聚酯——聚对苯二甲酸丙二酯所展示的许多优良特性，使1，3一PD的研究开发日趋活跃。

An improved chemical method for the determination of the molar substitution degree of hydroxyethyl guar gum has been described.

本文用模型小分子一缩二乙二醇的醚键断裂实验证明了可行性，羟乙基瓜尔胶上的羟乙基链段与过量对甲苯磺酸-乙酸酐在130℃下反应14hr，醚键完全断裂生成酯，并在pH=11条件下煮沸1hr使酯完全水解，转变为乙二醇。

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。