查询词典 esterification

The n-butyl lactate was synthesied by the esterification of lactic acid and n-butyl alcohol in presence of ammonium ferric sulfate dodecahydrate NH4Fe(SO4)212H2O,and the factor influencing on the yield of reaction were discussed.

摘 要：在十二水合硫酸铁铵催化下，由乳酸和正丁醇发生酯化反应合成了乳酸正丁酯。实验考察了该催化剂催化酯化合成乳酸正丁酯的醇酸比、催化剂用量、反应时间、反应温度诸因素对酯化率的影响。

The n butyl lactate was synthesied by the esterification of lactic acid and n butyl alcohol in presence of ammonium ferric sulfate dodecahydrate NH 4Fe(SO 4) 2·12H 2O,and the factor influencing on the yield of reaction were discussed.

在十二水合硫酸铁铵催化下，由乳酸和正丁醇发生酯化反应合成了乳酸正丁酯。

In this paper, synthetic process of PTT and cationic dyeable PTT was studied, including molar ratio, catalyst concentration, reaction time and temperature, types of antioxidants in the esterification reaction and the condensation reaction.

研究了聚对苯二甲酸丙二醇酯、阳离子染料可染PTT的合成工艺条件中各因素对酯化及缩聚反应的影响，包括单体物质的量比、催化剂浓度、反应时间和温度、抗氧剂种类等。

They were used as solid catalysts in the esterification of phosphoric acid with equimolar lauryl alcohol to monoalkyl phosphate ester.

结果表明，采用L^1-Mn-SiW（L^1：双水杨醛缩－1，6-己二胺）催化剂，在优化的反应条件下，酯化反应可获得93%的MAP收率和高达98%的MAP选择性。

Experimental results show that esterification reaction proceeds effectively at 200℃ with ferric sulfate as catalyst.

论文研究选用硫酸铁作酯化反应的催化剂，在醇酸摩尔比10：1.0，酯化温度200℃，酯化时间2小时。

A phospho molybdic acid catalyst was investigated for the esterification of fumaric acid with methanol in this paper.

研究了以磷钼酸为催化剂，富马酸和甲醇为原料合成富马酸二甲酯，探讨了酸醇量比、反应时间、催化剂用量等工艺参数对 DMF收率的影响。

The hydrogenation and methyl esterification of furoic acid over Pd/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor by one-step method.

采用连续流动固定床微反应器，以糠酸、甲醇、氢气为原料，Pd/γ-Al2O3为催化剂，使糠酸一步加氢甲醋化生成α-四氢糠酸甲酯。

The hydrogenation and methyl esterification of furoic acid over Pd-Ni/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor under different conditions such as reaction temperature,pressure,H2 space velocity,space velocity of furoic acid and methol,ratio of H2 and furoic acid and so on.

以糠酸、甲醇、氢气为原料，采用连续流动固定床微反应器，Pd-Ni/γ-Al2O3为催化剂，使糠酸一步加氢甲酯化生成α-四氢糠酸甲酯。

The hydrogenation and methyl esterification of furoic acid over Pd-Ni/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor under different conditions such as reaction temperature,pressure,H2 space velocity,space velocity of furoic acid and methol,ratio of H2 and furoic acid and so on.

以糠酸、甲醇、氢气为原料，采用连续流动固定床微反应器，Pd-Ni/γ-Al2O3为催化剂，使糠酸一步加氢甲酯化生成α-四氢糠酸甲酯。研究了反应的温度，压力，气、液体流速，进料流量等因素对催化反应的影响。结果表明：在1.5MPa，250℃，氢气空速3300 h-1，液体空速3.0 h-1(氢油比为50)时，糠酸转化率为96.6%，四氢糠酸甲酯的选择性97.2.0%，产率94.0%。催化剂稳定性较好，连续运转280小时后未见活性下降。该反应体系活性高，选择性好，反应压力低，催化剂性能稳定，操作简单，产物易分离

The monoesters of furoin were synthesized by esterification of corresponding the acyl chloride with the furoin.

糠偶姻单酯在醋酸铵和醋酸作用下合成了新化合物2-取代－4，5-双恶唑。

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。