查询词典 methyl salicylate

The analytical method for sodium methyl mercaptide was established based on the reaction in quantity between methyl mercaptan and iodine at the base condition.

采用甲硫醇与碘在碱性条件下定量反应生成双硫醚的反应原理，建立了甲硫醇钠的定量分析方法。

In this paper, the processes of methyl acetate recycling were reviewed; the method of separation methyl acetate-methanol by salt effect distillation was proposed.

本文对现行醋酸甲酯的几种回收工艺进行了评述，提出了加盐萃取精馏分离醋酸甲酯-甲醇的方法。

It is a classical chemical process for production of methyl acetate. But by the limits of. the formation of azeotropes in the process,we can't obtain hign purity methyl acetate by normal unit operation.

醋酸甲酯的制备是一种经典的化学过程，但由于反应过程中形成共沸物的限制，通过常规的单元操作不能够得到高纯度的醋酸甲酯。

In order to test the validity of this method, the saponification of methyl acetate, ethyl formate and methyl formate in aqueous solution at 25℃ has been studied.

研究了25℃下乙酸甲酯、甲酸乙酯和甲酸甲酯在水溶液中的皂化反应，其计算结果与文献值相吻合，从而验证了热弛豫法的正确性。

It is a classical chemical process for production of methyl acetate. But by the limits of. the formation of azeotropes in the process, we cant obtain hign purity methyl acetate by normal unit operation.

醋酸甲酯的制备是一种经典的化学过程，但由于反应过程中形成共沸物的限制，通过常规的单元操作不能够得到高纯度的醋酸甲酯。

It was concluded from the calculation that the results were satisfactory and the ratio of reflux to methyl acetate feed had less influence on the conversion of methyl acetate. It is good guide to the pilot experiment, and can provide the basis for the industrial design.

通过模拟计算得出了增大回流进料比不能有效强化醋酸甲酯水解的催化精馏过程的结论，为中试过程提供了有效的指导，也给工业化提供了依据。

The results showed that the optimum conditions were as follows: methyl alcohol as the solvent, the ratio of oil to methyl alcohol 1:2.0, extraction temperature 32℃, extracting 4 times for once 10min.

通过实验得到的最佳工艺条件为：以甲醇为溶剂，油与甲醇比为1：2.0，温度32℃，萃取次数4次，每次萃取时间10min。

However, it is to be noted that activity of sodium hydroxide with respect to the ester exchange reaction is not sufficient, and in order to improve the conversion rate of the waste edible oil to 90%, it is necessary to add methyl alcohol (stoichiometrically required amount of methyl alcohol is about 3 mole with respect to 1 mole of vegetable oil) and catalyst excessively.

不过，这是必须指出的活动氢氧化钠与尊重向酯交换反应是不足够的，并且为了提高转换率的废油脂至90 ％，这是必要的添加甲醇（ stoichiometrically要求金额甲醇约3摩尔与尊重，以1摩尔植物油）和催化剂过分。

GC ECD method was used to analyze the concentration of methyl chloride in atmospheric samples collected from different latitude. The experimental results show that the atmospheric concentrations of methyl chloride show a tendency to decrease towards the poles.

用GC ECD的方法对不同纬度氯甲烷浓度的分析研究表明，大气中氯甲烷的全球浓度表现出从赤道向两级递减的趋势。

DMC is a green chemical industry product which rapidly developed in the recent years, it can substitute for the organic chemical basic raw material such as the bigger toxic carbonyl chloride, methyl chloride, methyl chloroformate and so on, it is vital significance to the environmental protection.

碳酸二甲酯是近年来迅速发展起来的环境调和型绿色化工产品，它是可用于替代毒性较大的光气、氯甲烷、氯甲酸甲酯等物质的有机化工基本原料，对于环境保护具有重要意义。

Consumer preference ; fuzzy partial ordering relation ; condorect function

消费者偏好；模糊偏序关系； condorect函数

And she doesn't have a cat, she has a Mexican hairless.

而且她不养猫，她养了一只墨西哥无毛犬。