查询词典 optimum conditions

The product synthesized under the optimum conditions as follows had final acid value of 0.494 mgKOH/g,and conversion of reatants up to 99.59%,molar ratio of isooctanol to phthalic anhydride 3∶1,the dosage of both aluminium oxide and stannous octoate as catalyst 0.2%(based on the total mass of reactants),reaction time 2.5 hours.

考察了工艺条件对合成DOP的影响，结果表明，在异辛醇与苯酐摩尔比3∶1，氧化铝/辛酸亚锡复配催化剂用量分别占反应物总量的0.2%，反应温度230℃，反应时间2.5h的最佳工艺条件下，产品终点酸值0.494mgKOH/g，反应物转化率达99.59%。

The optimum conditions were obtained as follows: the weight ratio of fatty acids and 85%acetic acid is 1:4, ozonolysis temperature is 20-25℃, manganese/copper acetate as catalyst, and the amount of catalyst is 0.15% of fatty acids, oxidation decomposition temperature and oxidation decomposition time are 90-95℃ and 4 hours respectively. the yields of azelaic acid and pelargonic acid are 57.4% and 51.6% respectively.

以菜油酸为原料、85%醋酸水溶液为溶剂，经臭氧化、氧化分解、重结晶等过程制备壬二酸和十三烷二酸的最佳反应条件为：m：m(85%醋酸)=1：4，臭氧化温度20-25℃；氧化分解温度80-85℃，催化剂醋酸锰/醋酸铜用量为原料菜油酸质量的0.12%，氧化分解时间3h，重结晶溶剂壬酸的用量为5倍质量的氧化分解产物时，十三烷二酸的收率为58.3%，壬二酸的收率为57.2%。

Factors were reviewed, and optimum conditions was obtained,these experiments provide effective data for industrial manufacture.On the condition of using fatty acids of cottonseed oil as raw material,85% acetic acid as solvent,this paper prepared azelaic acid and pelargonic acid by ozonolysis, oxidation decomposition , extracted by boiling water,active carbon absorpting etc.

以棉油酸为原料、85%醋酸水溶液为溶剂，经臭氧化、氧化分解、沸水萃取、活性炭吸附脱色等过程制备壬二酸的最佳反应条件为：m：m(85%醋酸)=1：4，臭氧化温度20-25℃；氧化分解温度90-95℃，催化剂醋酸锰/醋酸铜用量为原料棉油酸质量的0.15%，氧化分解4h，壬二酸收率为57.4%，壬酸收率为51.6%。

Results The optimum conditions for the extraction of Peucedanum praeruptorum Dunn was as follow: 80 % alcohol was used as solvent, and 8 times the amount of alcohol was added, the mixture was kept refluxing for 1.0 h for the first time; then 6 times the amount of alcohol was added and the mixture was kept refluxing for 0.5 h for the second time; Four times the amount of alcohol for 0.5 h for the last time.

结果 白花前胡的最佳提取工艺为用质量分数80 %的乙醇提取3次，提取时间分别为1.0、0.5、0.5 h，3次所用溶媒量分别为药材质量的8、6、4倍；按照筛选出的最佳工艺条件进行的3次重复性实验，测得浸膏中8-甲氧基补骨脂素含量质量分数为0.094 %，折合1 g生药中含量为0.171 2 mg，与预测值基本一致。

ChinaThe optimum conditions of extracting flavonoids in the skin of phaseolus radiatus were investigated by using the orthogonal design.

研究结果表明：在 70℃下用6倍于绿豆皮重体积 3 0 %的乙醇回流提取 2次，每次 2 h，绿豆皮黄酮类化合物提取效果最好。

In order to solve the problem of producing large amounts of wastes and undesired o-nitrotoluene in synthesis of p-nitrotoluene with the mixed concentrated mineral acids,the catalytic activity of phosphotungstic acid for selective nitration of toluene was studied and the optimum conditions for preparing the catalyst were investigated.

为解决硝硫混酸对硝化甲苯过程中因甲苯的非选择性硝化产生的o-MNT和大量废酸对环境的危害，研究了磷钨酸对甲苯硝化反应的催化活性。

In traditional hydrothermal ion exchange preparating method with Na-montmorillonite as parent clay and aluminum polyorycations as pillaring species, with orthogonal experiments, the optimum conditions in preparation of Na-PILC were obtained.

设计正交实验，找到了合成层柱粘土的最佳工艺条件。

Self-made PSFA under the optimum conditions was used in the treatment of single practical water sample. Experimental results show that PSFA has better coagulation property than that of traditional coagulants Fe2(SO4)3 and Fe2(SO4)3 together with coagulant aid polysilicic acid;and the dosage of PSFA is less. The coagulation mechanism of PSFA was also discussed in this paper.

用PSFA混凝剂处理实际水样，并与单独投加混凝剂硫酸铁及硫酸铁加助凝剂聚硅酸效果进行了比较，结果表明，PSFA混凝剂的效果最好，而且用药量少；同时还对PSFA混凝剂的混凝机理进行了讨论。

Optimum conditions for the separation and preconcentration of Au, Pt and Pd are studied.

以亚硝基R盐作为螯合剂制备了负载树脂，研究了用该树脂分离富集 Au、Pt和Pd的最佳条件。

An SLon pilot continuous centrifugal concentrator (SLon pilot centrifugal concentrator) was used to study the effects of drum rotation speed and reciprocating velocity of water sprays on the separation performance of the concentrator under the optimum conditions of feed volume flow rate (24.5±0.4) L/min, feed solids content 20% and impacting pressure of water sprays 0.45 MPa, with the high gradient magnetic separation concentrate assaying 52.42% Fe from fine hematite tailings as test material.

摘 要：采用SLon实验型连续式离心机(简称SLon实验型离心机)，以高梯度磁选细粒赤铁矿尾矿得到的磁性产物(52.42% Fe)为试样，在给料体积速率为(24.5±0.4) L/min、给料固体浓度为20%和水束流冲击压力为0.45 MPa的条件下，研究转鼓转速和水束流往复速度对连续离心分离指标的影响。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。