查询词典 esterification

First esterification solution is prepared by alcoholysis PET. Then the feeding method, esterification and condensation temperature, catalytic-stable system and so on are adjusted.

酯化母液以醇解聚酯方法制备，然后通过对加料方式、酯化和缩聚温度、催化稳定体系等生产运行参数的调整，生产出质量良好的共聚酯切片。

The results showed that temperature rise would inhibit their esterification capacity, ethyl caproate-producing capability of raw zymin of 1# high-temperature monascus improved with the prolong of the esterification time when ethanol concentration was 4 %vol and caproic acid content was 4 mL, and when ethanol concentration and caproic acid content was within proper range, caproic acid content had more effects on the formation of ethyl caproate by raw zymin than ethanol concentration.

结果表明，温度相对升高对其酯化力的形成有一定的抑制作用；高温型红曲1#酯化菌株粗酶制剂的酯化力在乙醇浓度为4 %vol、己酸含量为4 mL时，产生己酸乙酯的能力随酯化时间的延长而增强；在适宜的乙醇浓度和己酸含量范围内，己酸含量对酯化酶粗酶制剂己酸乙酯生成影响比乙醇含量的影响大。

4The obtained solid alkali catalyst was applied to biodiesel preparation with colza oil and used oil as materials respectively and the technics was optimized by sigle-factor and orthogoral experiments with esterification rate as the index. The optimal technique conditions using colza oil were: the amount of solid catalyst 12%, the mol ratio of methanol to oil 9:1, reaction temperature 65℃, reaction time 3h, under which the esterification rate reached to 94.48%.

4以菜籽油和煎炸废油为原料，利用固体碱催化剂催化制备生物柴油，以转化率为考察指标，采用单因素和正交试验对工艺进行优化，得到以菜籽油为原料时制备的最佳工艺参数为固体催化剂投入量2.5％，醇油摩尔比9∶1，反应温度65℃，反应时间3h，转化率达到93.9％；以煎炸废油为原料时最佳工艺参数为反应温度65℃，反应时间3h，固体催化剂投入量4％，醇油摩尔比6∶1，转化率达到91.2％。

In this part, we analyzed the condition of pre-esterification and esterification, and found out the best method.

其中最优酯交换条件为：醇油摩尔比为6：1，催化剂为NaOH，用量为油重的1%，反应温度65℃，反应时间3小时。

Results showed that the monochromatic lights were advantageous to the Pchlide reduction and biosynthesis for etiolation seedling of Phaseolus radiatus in illumination for 0.5 h at first. The monochromatic light did not favor for Chlide esterification after illumination for 2 h. Chlide esterification was controlled by the cell nucleus gene, because Chlide esterification rate was restrained to the seedling leaf of P. radiatus.

结果表明：绿豆黄化幼苗在光照最初0.5h，单色光有利于Pchlide的还原和新Pchlide的生物合成；光照2h后，单色光不利于Chlide的酯化；CH明显抑制绿豆幼苗子叶Chlide的酯化速度，说明Chlide的酯化是受细胞核基因控制。

Secondly, triacylglycerol was obtained via lipase-catalyzed esterification of PUFA-rich fatty acid with glycerol. The TAG contents in the glyceride fraction reached 96 wt% with a degree of esterification of 94% after 6 h.

其次，将富含PUFA之脂肪酸与甘油在酵素催化反应下得到三酸甘油酯；反应6小时后产物甘油酯中TAG含达96 wt%，酯化程达94%。

Finally, pentyl acetate and benteine could be respectively synthesized by esterification reaction in the presence of nanometer rare earth composite solid superacids (SO_4)~(2-)/ZrO_2-Gd_2O_3 and (SO_4)~(2-)/ZrO_2-Nd_2O_3. The effects of reaction time, reaction temperature, the mol ratio of acid to alcohol and the use level of catalyst on esterification yield were discussed. In the end, we obtained their optimal reaction conditions.

采用纳米稀土复合固体超强酸SO_4~(2-)/ZrO_2-Gd_2O_3，SO_4~(2-)，~/ZrO_2-Nd_2O_3分别合成了乙酸戊酯和乙酸苄酯两种香料，实验考察了反应时间、反应温度、醇酸比及催化剂的用量对酯化率的影响，并由此得出反应的最佳条件。

As compared with traditional esterification, the cost of dehydrogenation was lower than that in process of esterification, and the actual yield reached 82% over 76.9% in esterification.

并将脱氢法与传统的酯化法进行了比较，脱氢法的成本要低于酯化法，且其实际收率达到了82%，超过酯化法的76.9%。

In the step of esterification, dehydration of boric acid and then esterifying with phenol were carried out in order to increase conversion of esterification. Effect of reaction temperature, consumption of boric acid, kinds and consumption of dehydrolating agent on the yield of esterification was studied. The experimental results showed that high conversion of 98% of esterification was obtained.

本实验将酯化反应分解为脱水反应步骤和酯化反应步骤，以便提高酯化反应收率，同时，考察了反应温度、硼酸用量、带水剂种类及用量对酯化反应收率的影响，实验结果表明，该步反应条件简便易操作，反应转化率达98%。

In this report, half-esterification between these pendent hydroxyl groups of hydroxyl-PU and maleic anhydride could lead to new pendent groups, carboxylic groups. These highly polar carboxylic groups in the side chain of PU could play the role of internal emulsifier. They had self-dissociation ability in the water or were neutralized first by appropriate amount of base. Then, PU bearing carboxylic group could dispersed steadily in the water, named aqueous-based polyurethane dispersion.

在本论文中，利用原来亲油性Hydroxyl PU主链段上悬挂的羟基经由与琥珀酸酐的半酯化(Half-esterification Reaction)反应后，使PU在侧链上悬挂具有强极性的羧酸基，其可作为聚胺酯分子中的内乳化剂，羧酸基能在水相中自身解离产生离子或加入适量碱使之中合，使聚氨酯高分子能够稳定分散於水中，即所谓水性PU分散液(Aqueous-based Polyurethane Dispersion)。

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。