查询词典 esterification

By first esterification reaction, the acid value of deodorizer distillates can be reduced to 30-40mgKOH/g from 145mgKOH/g.

在上述条件下，经一次酯化，脱臭馏出物酸价可从约145mgKOH／g降到30-40mgKOH／g。

In addition, when the modified PVA resins fulfilled requirements in the following: 1 the acetalization degree varied from 60 mol% to 80 mol%, 2 the esterification degree varied from 10 mol% to 20 mol%, 3 the amount of hydroxyl group was 5-25 mol%, 4 the range of value of B/P(the mass ratio of the binder to diazo resin) was from 4 to 4.5,5 the range of its molecular weight was from 4×10^5 to 8×10^5, the negative PS plate obtained had excellent sensitivity, hydrophobic property, good developability, good ink receptivity and good scratch resistance.

因此其分子量、酯化度和缩醛度的确定，必须综合考虑各项性能之间的平衡。缩醛度为60-80 mol%，酯化度10-15mol%，羟基5-25 mol%，分子量约为4-8万，B/P为4-4.5时，制得的阴图PS版的感度、显影性、着墨性和耐磨性都较好。

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。

Taking the soybean oil dreg as the raw material, using the method of esterification reaction and supercritical CO2 extracting, we carry through the research of extraction of natural VE .

以大豆油脚为原料，采用酯化反应和超临界CO2萃取方法，进行了天然VE 的提取研究。

Determine the content of the moisture with the dry law of the atmosphere; With is it draw law draw fat , analyse the backbone fat first esterification with the gaseous phase chromatogram to ask for; Determine the content of starch by fastenning all law; Propose the alcohol and sink the law and draw many candies with water, and determine many content of candy more than the color law with the phenol - the sulphuric acid.

用常压干燥法测定水分含量；用索氏提取法提取脂肪，将脂肪甲酯化，用气相色谱分析主要成分；用旋光法测定淀粉含量；用水提醇沉法提取多糖，并用苯酚-硫酸比色法测定多糖含量。

The influences of reaction parameters were discussed respectively, such as esterification time and temperature, catalyst dosage, ring-closing temperature, dosages of ECH, NaOH, etc.

重点研究了酯化阶段反应温度、反应时间及催化剂用量等影响因素；闭环阶段反应温度、碱的形态及ECH用量对闭环反应的影响。

They are very important to the enlargement of esterification reactor.

对酯化反应器的扩大增容设计具有十分重要的意义。

Therefore, it is a kind of effective and environ- mental friendly esterification catalyst.

由此可见，该催化剂是一种固载程度良好的环境友好型催化剂。

In this paper, a set of experimental device of esterification 3-hydroxybutyric acid was designed.

本文对PHB的化学合成工艺进行了研究，该研究具有重要的环境意义和经济意义。

The influence of reaction temperature and reaction time on degree of esterification were investigated.

通过正交实验考察了反应时间、反应温度对聚乙烯醇酯化程度的影响。

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。