查询词典 catalytic

Catalytic activity of phosphotungstic acid on synthesizing butanone 1,2-propanediol ketal was discussed,the factors influencing the synthesis were discussed and the best conditions were found out.

探讨了磷钨酸对丁酮1，2 丙二醇缩酮合成反应的催化活性，研究了酮醇摩尔比、催化剂用量、反应时间等因素对产品收率的影响。

And has very high thermal and hydrothermal stability. When it is used to prepare catalyst, under catalytic cracking condition, the output rates of ethylene and from ethylene to butylene can reach more than 18% and more than 50% respectively.

该分子筛的结构和活性中心具有很高的热和水热稳定性，它的最显著的特点是，用其制成的催化剂在催化热裂解条件下，乙烯产率可达18％以上，乙烯～丁烯产率可达50％以上。

Catalytic oligomerization of remain butylene is a way for enterprises to rebottle neck,and tap potentialities for more benefits.

剩余丁烯催化齐聚是企业消除瓶颈、挖潜增效的途径。

Butylene catalytic cracking over ZSM-5, SAPO-11, and MCM-22 catalysts in a continuous flowing fixed bed reactor was investigated.

在常压连续固定床反应器上考察了ZSM-5、SAPO-11和MCM-22分子筛的1-丁烯催化裂解性能。

In the catalytic pyrolysis process, the summary yield of ethylene, propylene and butylene reaches 51. 54wt%, indicating the prospective future for application of downer reactor in this process.

此外，下行床催化热裂解过程中的乙烯、丙烯和丁烯三种烯烃的总收率达到51.54wt％，显示出了良好的研究开发前景。

The temperature of calcine is the maximal influencing factor for catalytic activity of catalysts.

其中焙烧温度对催化剂的催化活性影响最大。

The experimental results showed that the catalyst had better catalytic activity and selectivity. The main product of the isomerization reaction was camphene, and the byproducts were limonene, terpinolene and tricyclene etc.

该催化剂具有较好的催化活性和选择性，异构化反应的主产物是莰烯，副产物是苎烯、异松油烯、三环烯等。

It can be seen from the above initial results, the two N-heterocyclic carbene palladium complexes should participate in the catalytic reaction or at least did partly.

初步结果可以得出，这两种N-杂环卡宾钯络合物参与或部分参与了卤代芳烃的催化偶联过程，对产物的顺利生成有某种程度的贡献。

The catalytic behavior of sodium carbonate was analyzed and discussed in terms of structure component of wood.

根据木材的结构成分对碳酸钠的催化行为进行了分析。

Present studies show that the catalytic performance of VO2/Schiff base system can not be improved by addition of carboxylic acids or carboxylate salts.

研究表明，向VO_2/Schiff碱催化体系中加入羧酸或其盐类化合物并不能提高催化剂的催化性能。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。