查询词典 catalyst

In our paper,1-hexylcarbamoyl-5-fluorouracils and1-cyclohexyl-carbamoyl-5-fluorouracils were prepared through 5-fluorouracil reacting with hexyl isocyanate or cyclohexyl isocyanate by using dimethylaminopyridine as the catalyst.

以5-氟尿嘧啶(5-FU)、正己基异氰酸酯和环己基异氰酸酯为原料，在N，N-二甲氨基吡啶的催化下，通过N-脲化反应制成1-己基氨基甲酰基-5-氟尿嘧啶及1-环己基氨基甲酰基-5-氟尿嘧啶。

A process in which naphthas are converted to high-octane aromatics in the presence of hydrogen and a catalyst under pressure and heat.

临氢重整在高温高压下，在氢和催化剂的作用下石油精转化为高辛烷值的芳烃的过程

It was found that catalyst activity of USY-1 was the highest under weight ratio of H3PW12O40/USY-1=1∶1,the concentration of H3PW12O40 of 25%,the temperature of 480 ℃ and the time of 4 h.

通过对催化剂制备的正交试验，优选了催化剂的制备条件：H3PW12O40与USY-1质量比为1∶1，H3PW12O40浓度为25%，480 ℃焙烧4 h制备的催化剂活性最高。

The monumental Homestead Act of 1862 provided the major catalyst for the settling of the American West.

巨大的家园提供了1862年法案的主要催化剂，解决美国西部。

The present invention has the advantages of homogeneous distribution of active catalyst component, small size, high metal dispersion, etc.

利用本发明的方法和装置制备的负载型金属纳米催化剂具有活性组分分布均匀、粒径小和金属分散度高等优点。

The two most common designs of SCR catalyst geometry used today are honeycomb and plate.

这两个最常见的设计可控硅催化剂几何今天使用的蜂窝板。

Additionally, there was new AES that may be a transition form of hybridism of carbon atom. It is concluded that carbon atom of graphite changes from sp^2 π to sp^3 through "metal catalyst layer", and deposits on the surface of diamond.

结果表明高温高压条件下石墨中碳原子经过"金属催化剂层"才能将碳原子的电子构形从SP^2π态改变成SP^3态，碳原子从而以金刚石四面体结构沉积到金刚石表面，金刚石晶格结构的形成是在金刚石表面层完成的。

The results show that the hydrofluoric acid is a effective catalyst for the gel formation.

以正硅酸乙酯为硅源，分别以HF和HF/氨水为催化剂，通过溶胶-凝胶法常压制备SiO2气凝胶。

Bromopropane is produced from hydrogen bromide and propene in the presence of catalyst by free radical addition process.

丙烯与溴化氢在催化剂作用下，进行自由基加成反应生产1-溴丙烷。

Through analysis and compare on the process data such as residual hydrogen in carbon dioxide, pressure difference and temperature of catalyst bed,before and after replacement,it comes to the conclusion that the application is successful and satisfied.

对国产催化剂应用前后的工艺情况———脱氢效果、反应器压差及床温进行了分析、评价，认为：用该催化剂取代进口催化剂是成功的，完全能满足工艺要求。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。