查询词典 catalyst

Sodium bisulfate is an excellent catalyst for synthesizing butanone 1,2-propan.

以一水合硫酸氢钠为多相催化剂，由丁酮和1，2-丙二醇反应合成了丁酮1，2-丙二醇缩酮。

The experimental results showed that: 1 cylindrical catalyst prepared by extrusion was used in mixed butene oligomerization, whose conversion and dimer selectivity wre seperately as high as 41% and 52%.

实验结果表明：1挤出成型法制得的圆柱状催化剂催化混合丁烯齐聚反应的转化率和二聚物选择性分别高达41%和52%。

The effects of reaction temperature WHSV and addition of water vapor on skeletal isomerization of butene over SAPO-11 catalyst were investigated in a fixed-bed down-flow reactor.

在连续流动固定床反应装置上，考察了温度、空速及添加水蒸汽对混合丁烯在SAPO-11分子筛催化剂上骨架异构化的影响。

The isobutane/butene alkylation reactions over a solid acid catalyst were carried out under liquid phase and supercritical conditions respectively.

分别在液相和超临界两种反应条件下进行了固体酸烷基化催化剂的烷基化反应，并以超临界异丁烷流体对失活催化剂进行了再生。

The key to the satisfaction of hydrogen sulfate catalyst of butyl acrylate.

本文主要研究以硫酸氢纳为催化剂合成丙烯酸正丁酯。

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。

According to reaction characteristics of producing gasoline with high olefin by Daqing raw material and converting butylene to propylene, MMC-2 and the catalyst for maximizing yield of propylene developed by Lanzhou petro-chemic academe are used to perform trial study considering reaction conditions.

针对大庆催化原料、大庆原料经一段转化生成的高烯烃含量汽油和丁烯转化生成丙烯的反应特点，结合两段工艺技术所能提供的反应条件，选择MMC-2和兰州石化研究院开发的多产丙烯催化剂分别进行实验室的中试评价。

The optimum conditions were determined as follows:the molar ratio of butyraldehyde to glycol was 1∶1.6,the mass ratio of catalyst to reactants was 0.4%,the volume of cyclohexane as the water-carrying agent was 10 mL,and the reaction time was 60 min.

结果表明，磷钨钼杂多酸对合成丁醛乙二醇缩醛有较好的催化活性，适宜的反应条件如下：n∶n=1∶1.6、催化剂用量为反应物料总质量的0.4%、带水剂环己烷用量为10 mL、反应时间为60 min。

Using butyraldehyde and 1,2-propanediol as raw materials, H3PW6Mo6O 40 /TiO2 as catalyst, butyraldehyde 1,2-propanediol acetal is synthesized.

以二氧化钛负载磷钨钼杂多酸为催化剂，通过丁醛和1，2-丙二醇反应合成了丁醛1，2-丙二醇缩醛。

In a recirculating photocatalytic reactor,the degradation of low concentration butyraldehyde , a gaseous pollutant,over the catalyst was performed.

利用二氧化钛与活性炭共水热处理的方法制备了TiO2/AC复合催化剂，采用空气净化评价装置对其催化降解低浓度气体污染物丁醛的性能进行了模拟评价实验。

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％。