查询词典 chloroacetic acid

Effects of ratio of p chlorophenol to 2 chloroacetic acid,reaction temperature,reaction time and pH value on the reaction were studied.

对原料配比、反应温度、反应时间和溶液pH值等各种反应条件的影响作了详细研究。

P chlorophenoxyacetic sodium was synthesized by p chlorophenol with 2 chloroacetic acid in the 20% hydroxide sodium aqueous solution.

采用一步法由氯乙酸与对氯苯酚在氢氧化钠质量分数为 0 2的水溶液中的反应制得。

When the molar ratio of 2 chloroacetic acid∶ p chlorophenol is 1.25 and pH=5～7 at 104 ℃ reaction for 20 min in the 20% NaOH solation,the yield of PCPA can be reached 90%.

氯乙酸∶对氯苯酚为 1 2 5 ，质量分数为 0 2的氢氧化钠溶液中，pH值在 5～ 7之间，温度在 10 4℃左右为宜，反应时间为 2 0min ，PCPA收率为 90 3%。

Therefore, Chinese Chloroacetic acid industry needs to improve present production technics, to increase production capacity and equipment standard, develop and take advantage of newfashioned efficient catalyst, make better manners and methods for controlment, to reinforce recycle and synthetically utilize mother liquor,so as to raise product quality and level, reduce production cost, decrease environment pollution, increase economic benefits.

因此，中国氯乙酸行业要改进现行生产工艺，提高生产规模与装备水平，开发利用新型高效催化剂，改进控制手段与方式，加强母液的回收与综合利用，从而提高产品质量和档次，降低生产成本，减少环境污染，增加经济效益。

A new method of gas chromatographic analyses in the production of chloroacetic acid for process control using diazomethane as esterification agent is studied.

目前企业生产分析按照国家专业标准﹝1﹞进行，但分析周期长，不能对反应过程进行有效地实时控制，生产过程的实际中控方法为密度法。

It was studied in this thesis the preparation of Artemisia glue, under the condition of alkali, chloroacetic acid was used as etherification agent and the properties, structures and application in quick-frozen dumpling were researched too.

本论文主要研究了以沙蒿胶为原料，氯乙酸为醚化剂，在碱性条件下合成羧甲基沙蒿胶的工艺，并研究了羧甲基沙蒿胶的性质、结构及其在速冻水饺中的应用。

METHODS Polyaldehyde dextran-epirubicin was made by sodium periodate oxidation.Carboxy-methyldextran-epirubicin was made by chloroacetic acid carboxymethylation followed by conjugating in hydrazone bond.

采用高碘酸钠氧化法制备聚醛基葡聚糖-表柔比星偶合物，将葡聚糖羧甲基化后制备腙健连接的羧甲基葡聚糖-表柔比星偶合物。

This article through the belt hydroxyl aldehyde class material and the chloroacetic acid response, the synthesis intermediate, then with the neighbouring phenylene diamine responded again synthesized 6 kind of benziminazole class compound, including 4 kinds not to report.

本文通过带羟基的醛类物质和氯乙酸的反应，合成中间体，然后再与邻苯二胺反应合成了6种苯并咪唑类化合物，其中有4种还未被报道。

Carboxymethyl dimethyl sulfonium chloride as a novel aquatic feed attractant was synthesized with chloroacetic acid, methyl sulfide and in solvent free system.

运用无溶剂合成方法，利用较低成本的氯乙酸为原料与二甲硫醚反应，合成新型水产动物诱食剂——氯化羧甲基二甲基锍。

The yield of borneol and isoborneol was 52.93%,and selectivity for borneol was 60.46%at the conditions of programmed temperatures,reaction time 315 min,saponification time 1h,mass part of catalyst 5%,and terpineol:chloroacetic acid 100∶25.

酯化反应采用程序升温，时间315 min，皂化时间1 h。催化剂用量为松节油质量的5%，松节油∶氯乙酸为100∶25时，龙脑得率为52.93%，正龙脑的选择性为60.46%。

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。