查询词典 catalyst

The synthesis of isoamyl acetate with sulfuric acid and TBAB as catalyst was studied,and the effects of the raw material ratio,the dosage of catalyst and reaction time on the yield were investigated.

以冰乙酸和异戊醇为原料，用浓硫酸和四丁基氯化铵混合物催化合成乙酸异戊酯。

In order to further predict the durability of the TS-1 catalyst in the severe condition of calcination regeneration, a catalytic deactivation method was employed to facilitate the obtaining of deactivated catalyst from the regenerated sample, and thus the conduct of repetitious regenerations.

研究了负载成&蛋壳型&的TS-1催化剂在丙烯环氧化的单管放大试验装置上连续运转1 200 h失活后的焙烧法再生条件，并结合催速失活，对该催化剂进行了多次焙烧再生研究。

The effects of molar ratio of anhydrous ethanol to glacial acetic acid, dosage of catalyst, reaction temperature and reaction time on the esterification ratio and reuse of catalyst were discussed.

探讨了酸醇物质的量的比，催化剂的用量，反应时间和反应温度对酯化率的影响及催化剂的重复使用情况。

Mechanical or physical failure of the catalyst is the cause of process shutdowns and catalyst changeouts more often than activity loss.

催化剂的机械性能或物理性能损坏是生产停车和催化剂更换的主要原因，往往比失活所造成的还要多。

At 80℃, the yield of esterification of benzoic acid with ethanol could reach 95% by using 10% catalyst for 6 h; the conversion of toluene in the nitration with 1 equiv. of 65% nitric acid could be achieved to 99% by using 5% catalyst for 5 h.

在80℃下，摩尔分数为10%的Yb(NTf2)3负载催化剂，反应6h可使苯甲酸乙酯的产率达95%；摩尔分数为5%的Yb(NTf2)3负载催化剂，反应5h可使甲苯与等摩尔质量分数为65%硝酸的硝化反应转化率达99%。

By means of Tyndall effect, electron microscope and ultrafiltration, it was found that the catalyst dispersed in toluene solution existing as colloidal particle sizes was from 1nm to 100 nm. The catalyst belonged to highly dispersed polyphase catalytic system.

通过Tyndall效应、电镜观察和超过滤实验，证明了V3-Al2Cl催化体系在溶有丁二烯的甲苯溶剂中以小颗粒分散，粒径在1～100 nm之间，为胶体催化剂，属于高度分散的多相催化体系。

Single component and multi\|component of iron system colloidal catalyst \Ali\|Bu\-3CH\-2CHCH\-2Cl\ were mixed by different ratios in hydrogenated gasoline medium at 25℃.This paper studied the relationship between the nonaqueous systematic electroconductivity and the concentration of catalyst components.In combination with Tyndall effect,polymerization experimental results,Ali\|Bu\-3 existed in associated state and dissociated into ionpair.The reaction between Ali\|Bu\-3 and Fenaph\-2 was the main reaction which formed colloidal core.Ali\|Bu\-3 reacted on CH\-2CHCH\-2Cl and Ali\|Bu\-2Cl was yielded which joined the formation of active center on the surface of colloidal core.The excessive Ali\|Bu\-3 was dissociated into ionpair which formed double electrode layer,and the double electrode layer kept the colloidal particles relatively stable.

研究了在25℃加氢汽油介质中，铁系胶体催化剂［Fenaph2Ali-Bu3―CH2==CHCH2Cl］单组分、多组分按不同配比混合，非水体系电导率与浓度的关系，结合Tyndall效应，聚合实验结果，得出Ali-Bu3以缔合状态存在并解离成离子对它同环烷酸亚铁的作用是形成胶核的主要反应，与氯丙烯反应生成的氯化异丁基铝，在胶核表面参与形成活性中心由过量Ali-Bu3解离的离子对形成的双电层结构，使胶粒保持相对稳定。

The results showed that wood of Japanese cedar liquefied with H2SO4 as the catalyst had a better effect than that with HCl as the catalyst.

由试验结果得知，柳杉木材於酚液体中进行液化处理时，以H2SO4为催化剂者有较佳之液化效果。

The Lewis acid catalyst-aluminium chloride was first used as catalyst for cyclization of pseudoionone in this study.

首次将Lewis酸催化剂氯化铝应用于假性紫罗兰酮环化反应。

The acidity of Lewis acid sites and the basicity of Lewis base sites influence the intensity between water, 1,2-dichloropropane and catalyst. The specific area of catalyst influences the capacity of adsorption.

催化剂Lewis酸位和Lewis碱位的酸碱强度直接影响水、1，2－二氯丙烷与催化剂的作用强度，而催化剂的表面积直接影响吸附量。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。