selectivity of catalyst

Cr(ⅲ)-Based Catalyst System for Oligomerization of Ethylene to 1-Octene with High Selectivity

用于乙烯齐聚高选择性制1-辛烯反应的Cr（Ⅲ）基催化剂体系

In the range of room temperature ( about 20~ 30), 100% propylene conversion and 87% selectivity of isopropyl benzene was obtained when the ratio of benzene to propylene was 8:1 in weight and the amount of catalyst was 1/ 3 weight of benzene;

在室温范围内（20～30℃），当苯与丙烯质量比为8：1，离子液体催化剂的用量占苯质量的1／3时，可获得100%的丙烯转化率和87%的异丙苯选择性；

The side-stream test of a new high selectivity low temperature shift catalyst

新型高选择性低变催化剂的工厂侧流试验

The catalyst has high catalytic activity and selectivity for the prodn . of acrylamide from acrylonitrile.

本发明催化剂在丙烯腈催化合制丙烯酰胺的过程表现出很高的活性及选择性.

They both had higher catalytic activity and selectivity. The catalytic activity and selectivity of different catalyst has been studied extensively.

总之，二种HTLcS催化剂太原理工大学硕士研究生学位论文均表现出了较高的催化活性和高选择性。

A new method to synthesize N, N'-diphenyl thiourea ( DPTU) from aniline and CS 2 was developed in the presence of acidic resin as catalyst under reflux temperature for 6 h with the yield of 82.7% and the selectivity of 100%.

探讨了合成二苯硫脲的新方法。以酸性树脂作催化剂在回流温度下使苯胺与CS2反应6h，二苯硫脲的收率达827%，选择性为100%。

A small quantity of acetone in feed material is advantageous to the increase of the catalyst activity, selectivity of MIBK and DIBK, but excess acetone will make against the synthesis reaction process.

反应物相中少量丙酮的存在有利于催化剂活性、MIBK和DIBK选择性的提高，但过量丙酮的存在对合成反应不利。

Catalyst CDH has good selectivity and activity at the temperature of 240℃.

反应温度在240℃时,催化剂CDH有良好的选择性和较高的反应活性、稳定性.

Under mild conditions, at room temperature and ambient atmosphere, diphenyl thiourea could be synthesized through the reaction of aniline and CS 2 over AlCl 3 catalyst with high yield and high selectivity.

常温常压下，用AlCl3作催化剂催化苯胺和CS2进行反应，可以高收率和高选择性地得到二苯硫脲。

The catalyst has high activity, selectivity and the characteristic of reaction controlled phase transfer catalyst.

该催化剂具有高活性、高选择性，且具有反应控制相转移催化剂的特性。