氯乙酸

The dependence of concentration of free sodium hydroxide,hydrolyzation ratio of sodium chloroacetate,degree of substitutionand solution viscosity of product on reaction conditions in the synthesis of polyanionic cellulosein various alcohol mediums are studied.

研究了溶剂法合成聚阴离子纤维素过程中游离碱浓度、氯乙酸钠水解率和产品取代度及其溶液粘度与反应条件的关系。

Trans-3-phenylglycidate ethyl ester was prepared from benzaldehyde and ethyl chloroacetate through Darzens condensation reaction.

以苯甲醛和氯乙酸乙酯为原料，经Darzens 缩合反应合成了反式-3-苯基缩水甘油酸乙酯，然后在25℃以氨水开环得赤型-3-苯基异丝氨酰胺。

In this paper, the applications of the environmental friendly solid acid catalysts for esterification were studied and the activities of these catalysts were discussed, by which the solid acid ferric sulfate x-hydrate was used first as catalyst in the synthesis of dimethyl fumarate and ethyl chloroacetate and solid super acid SO42-/Fe2O3 was used first as catalyst in the synthesis of ethyl p-nitrobenzoate.

本文研究了对环境友好的固体酸催化剂在酯化反应中的应用，首次以固体酸Fe_2(SO_4)_3·xH_2O为催化剂合成了新型防霉剂富马酸二甲酯和化工原料氯乙酸乙酯，以固体超强酸5O_4~(2-)／Fe_2O_3为催化剂合成了医药中间体对硝基苯甲酸乙酯，并探讨了这些催化剂的催化活性。

Under above conditions, 97.6 % of chloroacetic acid was converted.

在此反应条件下，氯乙酸的酯化率为97.6%。

Fibers with different degrees of carboxymethylation were prepared by controlling the ratio of the weight of fiber to chloroacetic acid.

通过控制氯乙酸和纤维的质量比得到不同反应程度的羧甲基纤维素纤维。

Results showed that chloroacetic acid was the best reagent for esterification and the catalyst had satisfactory catalytic activity and selectivity.

实验结果表明，氯乙酸是最佳酯化剂，催化剂具有较强的活性及选择性。

Based on the result of orthogonal experiment, theoptimum condition of the esterification reaction of chloroacetic acid with polyethylene glycolwas determined.

采用正交实验法对合成的双氯乙酸聚乙二醇酯的反应工艺条件进行了优化，确定了最佳合成路线。

The model was applicable to most of the organics in the experiment, and wasnot well applicable to acetone and chloroacetic acid.

模型对大部分试验有机物都适用，对丙酮和氯乙酸的适用性较差。

The effects of mole ratio of chloroacetic acid to ethyl alcohol, catalyst dose, water-carrying agent dose and reaction time on the yield of ester are tested.

研究了氯乙酸与乙醇的摩尔比、催化剂用量、环己烷的用量、反应时间诸因素对产品收率的影响。

Results The infra-red spectragram of the derivate showed the chitosan had been modified by chloroacetic acid.

结果修饰后的衍生物经红外图谱分析表明，壳聚糖已被氯乙酸所修饰。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。