查询词典 acid ratio

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。

Then the optimal conditions were decided as follows: the ratio of wall-material to core-material should be 8.0 to 2.0, with ployacrylic sodium as dispersing emulsifier, NH4Cl as acid catalyst, and with the time of pouring catalyst being 2 h, the pH value at end point 2.0, the temperature of condensation reaction under control about 70℃, the reaction time 3 h, the stirring speed 1000 r/min.

研究了壁材与芯材的比例、分散乳化剂、催化剂、反应温度和搅拌速度5因素对微胶囊产品的影响，得出最优化的工艺为：壁材与芯材的比例为m：m=8.0：2.0，以聚丙烯酸钠为分散乳化剂，氯化铵为酸性催化剂，加入速度以2 h加完，终点pH值为2.0，缩聚反应温度控制在70℃左右，反应时间为3 h，搅拌速度为1000 r/min。

The experimental result showed that the optimal conditions were the molar ratio of potassium bromide to cyclohexanol 1:0.8, H2O 1.5mL,concentrated sulfuric acid 5mL , reflux reaction for 4h, the separated yield was high up to 93%.

结果表明，当反应条件为：溴化钾与环己醇摩尔比1：0.8，水1.5mL，浓硫酸5mL，回流反应4h，分离产率高达93%。

Optimal process conditions for preparing N,N'-ethylenediamine diacetic acid: Potassium cyanide was combined with formaldehyde and ethylenediamine at a mole ratio of 2.4 to 2.4 to1, at temperature 18℃,and then was hydrolyzed for 8 hours.

通过单因素分析，合成N，N′—乙二胺二乙酸的最佳反应条件为：反应温度为18℃，水解时间为8 小时，甲醛∶氰化钾∶乙二胺的摩尔比为2.4∶2.4∶1。

In this study, Chitosan-Poly complex nanoparticles were prepared by template polymerization of acrylic acid in the chitosan solution. The preparation and characterization of CS-PAA nanoparticles including the yields of the nanoparticles, FT-IR spectrum analysis, dynamic light scattering, zeta potential, and morphology of nanoparticles were concentrated in this study. The effects of temperature, weight ratio of CS and PAA, and pH value on the physicochemical properties of nanoparticles were studied.

本研究中，我们以模板聚合法在几丁聚醣（Chitosan， CS）溶液中聚合丙烯酸（Acrylicacid， AA）以制备几丁聚醣－聚丙烯酸复合奈米颗粒并计算其产率，再以傅利叶红外线光谱仪、动态光散射粒径分析仪（Dynamic light scattering， DLS）、表面电位测定仪及穿透式电子显微镜等仪器分析CS－PAA 复合奈米颗粒之性质，以探讨聚合时温度、聚合反应时间、CS 与AA 之重量比，以及介质pH 值对CS－PAA 复合奈米颗粒结构的影响。

Time 2.5h, ratio of raw material 1:0.71:0.68 (pyrolusite: pyrite: sulfuric acid)and when pH was controlled about 5.4, the leaching out rate of manganese can get to 90％, Through purification and calcium depositing, the quality of the products was conform to GB1662-82, Experiments(100kg grade)were carried out.

时间2.5小时，原料配比为1：0，71：0.68，最终pH值控制在5.4左右，锰浸出率在90％以上。溶液经净化、沉钙，产品质量符合GB1622-86标准。100公斤级扩大试验验证了小试验，结果可靠，产品质量稳定。

The influences of the type and dosage of the aldehyde, organic acids, as well as the water content in the reaction system on the racemization were examined in detail, and L-Glu was racemized quickly in the presence of 0.2 molar ratio of L-Glu to salicylaldehyde in acetic acid containing 20% water.

详细考察了醛的种类及用量、羧酸溶剂的种类、反应体系的含水量对消旋化的影响，结果表明L-谷氨酸在含20%水的乙酸溶剂中，以水杨醛作为催化剂(水杨醛与L-谷氨酸的物质的量比为0.2)的优化条件下可以快速地被消旋化。

The effects of molar ratio of linoleic acid and ethanol, temperature , and amount of ionic liquid on esterification reaction were studied and the optimal reaction conditions were obtained, that is, n :n = 4:1 , at refluence temperature, with the amount of ionic liquid equaling 42wt.

研究了环境友好的BF4离子液体催化亚油酸等高碳脂肪酸与无水乙醇酯化反应，考察了亚油酸与乙醇的摩尔比、反应温度、离子液体用量等条件对亚油酸酯化反应结果的影响，优化了反应的工艺条件。

ResultsThe inhibitory ratio of retortion of mice induced by acetic acid was 64.24% and 24.24% respectively after QiXingZhenTongGao being administered at the pain threshold of mice.

方法采用醋酸建立小鼠疼痛扭体模型及小鼠热板法，观察七星镇痛膏的镇痛作用；采用二甲苯所致小鼠耳廓肿胀和右旋糖酐所致大鼠足跖肿胀形成模型，观察七星镇痛膏的抗炎作用。

Using pickling liquid wastewater of hydrochloric acid,iron scurf and aluminiferous mine as raw materials,a series of poly-aluminum-ferric-silicate-chloride which has different molar ratio of Si:Al:Fe was prepared.

在钢铁制品的制备加工过程中，经常要用到盐酸或硫酸对其表面进行酸洗除锈处理，因此产生大量的酸洗废液，其中含有大量的亚铁离子。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。