查询词典 selectivity

At this temperature, the selectivity of acrylonitrile is 92.7% and the conversion of acetonitrile is 19.9%.

在反应温度为400℃时，Mn_(0.2)/BaCO_3催化剂上丙烯腈的选择性为92.7%，乙腈的转化率为19.9%。

Under the optimal conditions 1.5×10~(-3 mol/L of 22, 1.0 MPa of O_2, 120℃, 20 h, the conversion of ethylbenzene was 37.8%, and the selectivity for acetophenone and 1-phenylethynol was 82.5% and 13.5% respectively.

在22浓度为1.5×10~(-3)mol／L，氧气压力为1.0 MPa，120℃反应20 h，乙苯转化率为37.8％，苯乙酮的选择性为82.5％，1-苯基乙醇的选择性为13.5％，锰配合物23次之。

Almost 100% selectivity to cyclohexene could be obtained when the molar ratio of acetic acid to cyclohexane was 12.9∶1 at 450 ℃, the conversion of cyclohexane was 6.9%.

反应温度为450 ℃，醋酸与环己烷的摩尔比为12.9∶1时，环己烷的转化率为6.9%，环己烯的选择性为100%。

Further increasing the Mo content results in the remarkable decrease of acrolein selectivity.

Mo含量进一步增加，催化剂的丙烯选择性增加而丙烯醛选择性下降。

So, the addition of Te to MoBiO/SiO2 catalyst promoted the acrolein selectivity greatly.

因此，Te添加量有一最佳范围，n/n为0.05-0.1时催化剂具有较好的催化性能。

By adopting phosphowolframic acid loaded by Al2O3 as catalyst for preparing acrolein, the corrosion of equipments could be avoided and the environmental pollution was decreased and the glycerol conversion and mole selectivity of acrolein would be increased greatly.

结论］采用Al2O3负载的磷钨杂多酸作为催化剂制备丙烯醛可避免对设备的腐蚀，减少对环境的污染，大大提高甘油的转化率和丙烯醛的摩尔选择性。

Finally, Based on the whole research work, a new technology, named"ultimate recycle operation"was proposed. The main purpose of this technology is to obtain the maximum selectivity of acrylonitrile and it is of great importance on conservation of resources and environment protection.

最后，在全文研究工作的基础之上，本文提出一种"极限式循环操作"反应技术的设想，利用该反应技术能够最大限度地提高丙烯腈的选择性，降低深度氧化产物的生成，在节省资源和环境保护等方面均具有突出的应用意义。

Michael addition reaction , the degree of regional selectivity.

迈克尔加成反应有一定的区域选择性。

1,6-Dimethyl adipate with selectivity of 100% was synthesized by batch and continuous esterification process using adipic acid and methanol as raw materials,DNW-I strong-acid cation exchange resin as catalyst.

摘 要：以DNW-I型强酸型正离子交换树脂为催化剂，己二酸和甲醇为原料，经间歇酯化和连续酯化反应后通过精馏可制备选择性为100%的1，6-己二酸二甲酯。

To be successful, a crucial selectivity problem in the conversion of aldehyde 4 to aldol 3 had to be understood and solved.

要取得成功，关键选择性问题转化为乙醛醛34已被理解和解决。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。