查询词典 esterification

Road marking paints made from gum rosin,high molecular polymer,unsaturated dibasic acid and polyalcohol by condensation and esterification,then heat-stabilizer and light-stabilizer are added in.

道路标线涂料专用树脂是由松香、高分子聚合物、不饱和二元酸及多元醇经缩聚、酯化后加入热稳定剂、光稳定剂后制成的不规则半圆粒状或片状产品。

Nd_2O_3 was used as catalyst for estrification of Acetic acid with propanol and discussed thevariant conditions in reaction of esterification.

以三氧化二钕为固体催化剂，实现了乙酸和丙醇的酯化反应，讨论了催化酯化的各种影响因素。

We prepared the pyrethric acid II through four reactions: esterification, oxidation, decomposition, diesterification. And the original synthesis route of the pyrethric acidII was improved: the yield of oxidation of allyl rise through increasing the activity of Selenium dioxide; in the document, tert-butyl-trans -2, 2-dimethy1-3-(2"-methoxycarbony1-1"-propenyl)cyclopropanecarboxy late was synthesized from tert-butyl-trans-2,2-dimethyl-3-(2 -formyl-r -propenyl) cyclopropanecarboxylate with two steps, with low yield.

我们经过酯化，氧化，成双酯，热分解四步反应，成功地得到了第二菊酸，并改进了原第二菊酸的合成路线：通过改变二氧化硒的活性提高了烯丙甲基的氧化产率；将原路线中醛氧化成羧酸、羧酸酯化的两步反应改为醛和甲醇、二氧化锰等作用一步直接酯化的方法，减少了反应步骤，提高了总收率。

Normal propyl cinnamylate was synthesized by the esterification of normal propyl alcohol with cinnamic acid in the presence of potassium bisulfate monohydrate.

应用硫酸氢钾催化肉桂酸与正丙醇的酯化反应合成肉桂酸正丙酯。

Propyl gallate ; synthesis ; esterification ; new technology ; food antioxidant

没食子酸丙酯；合成；酯化；新工艺；食品抗氧化剂

Objective To analyze the components of organic acids in the Radix Ranunculi Ternati from different methods. Methods With using 10%H2SO4-CH3OH as methyl esterification solvent, the analysis for organic acids were carried by using GC-MS . Results 46 components were determined.

目的 分析不同提取法提取的猫爪草有机酸部位的成分方法采用离子交换法提取分离水提液和醇提液中的有机酸，以10%硫酸甲醇溶液甲酯化试剂进行甲酯化，用气相色谱-质谱联用技术分析。

The effects of molar ratio of linoleic acid and ethanol, temperature , and amount of ionic liquid on esterification reaction were studied and the optimal reaction conditions were obtained, that is, n :n = 4:1 , at refluence temperature, with the amount of ionic liquid equaling 42wt.

研究了环境友好的BF4离子液体催化亚油酸等高碳脂肪酸与无水乙醇酯化反应，考察了亚油酸与乙醇的摩尔比、反应温度、离子液体用量等条件对亚油酸酯化反应结果的影响，优化了反应的工艺条件。

Then esterification of 3, 7-dimethyl-2-pentadecanol with acetic anhydride, the active component of sex pheromone of pine sawfly, 3, 7-dimethyl2-pentadecanyl acetate was obtained in 83. 4％ yield.

最后，用乙酸酐对3，7-二甲基-2-十五碳醇进行酯化，得到松叶蜂性信息素的活性组分--3，7-二甲基-2-十五碳醇乙酸酯，收率为83.4％。

The experimental setup includes the reactor of gas-phase esterification, gasifying device of methanol, refining device of raw product and the segregator of oil and water.

试验装置主要由气相酯化反应器、甲醇气化器、粗生物柴油精馏器和油水分离器等组成。

Our technology develops a single step method of producing biodiesel from the waste plant and animal oil by using DYD catalyst to carry out transesterification and esterification simultaneously.

本技术可使用不同酸价的油脂为原料，在常压下反应，反应转化率可达96%，油脂利用率100%，所获得的生物柴油产品的品质达到美国ASTM 6751标准。

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。