查询词典 catalyst

The results showed that sodium bisulfate monohydrate was a good catalyst for the synthesis of fenofibrate, which would not cauterize the equipment, was friendly to the environment, and could be reused. The yield of fenofibrate was 88.6%.

改进发现一水合硫酸氢钠是一种不腐蚀设备、对环境友好的优良催化剂，酯化率可达88.6 9%，适合工业化生产。

Based on catalyst Ls, the effect of ultrasonic cavitation on the low-temperature activity of catalysts has been investigated.

在催化剂Ls的基础上，研究了超声空化对催化剂低温活性的影响。

Solid superacid SO(superscript 2- subscript 4)/Fe2O3 was prepared and used as a green catalyst to replace traditional vitriol in synthesis of cellulose acetate.

合成了固体超强酸SO(上标 2-下标 4)/Fe2O3，并将其用作浓硫酸的绿色替代催化剂进行纤维素的醋酸酯化反应。

And then the functionalized carbon nanotube, partial platinum salt and all transition metal M salt are stirred and reflow for certain time, added with rest platinum salt to continue to reflow, cooled, washed centrifugally, dried and carried out heating treatment in a hydrogen atmosphere, thus obtaining the anchoring platinum catalyst of the transition metal on the carbon nanotube.

然后将功能化的碳纳米管与部分铂盐和全部过渡金属M盐在多元醇溶剂中搅拌回流一定时间后，加入剩余的铂盐继续回流，冷却，离心洗涤，烘干，最后在氢气气氛中热处理，得到碳纳米管上过渡金属锚定铂催化剂。

The catalyst auto-continuous addition was realized by using the CENTUM sequence control function.

利用CENTUM集散控制系统的顺序控制功能，即可实现催化剂自动连续补加。

The nano-sized ceria is a new catalyst and has wide application in the chemical industry and pollution controlling.

纳米氧化铈是新兴的催化材料，在化学工业和环境污染控制方面有着广泛的应用前景。

The results showed that adding a small amount of ceria improved the dispersion of cobalt, decreased the electron density of the cobalt particle, and enhanced the dissociation of CO on the catalyst surface.

表征结果表明，少量CeO2助剂的添加提高了活性组分Co在催化剂表面的分散度，降低了催化剂表面Co的晶粒度，使催化剂对CO和H2的吸附性能发生了改变。

The influence of acrylic acid and cetane alcohol,amount of catalyst and inhibitor,reaction temperature,reaction time were investigated.

实验结果表明，合成的最佳反应条件为：丙烯酸与十六酯的物质的量之比为1.2∶1，对甲苯磺酸的用量为0.6%，对苯二酚的用量为0.4%，反应温度为110℃，反应时间为5 h。

Usage: It can be utilized for industrial hydro processing liquid, printing board acid, circuit board acid, oxidant and mordant for the dying industry, catalyst for the orgainc indusry, as well as the material to build chalybeate and colorant.

iexcl；用途：用作工业水处理剂、净水剂、印刷制版腐蚀剂、电子行业蚀刻液、染料工业的氧化剂和媒染剂、有机合成工业的催化剂和制造其它铁盐、颜料的原料。

It is shown that the surface structure, characteristic, and catalytic property of the catalysts are obviously affected by the catalyst preparation methods.

结果表明，镧助剂的引入使得铁锆催化剂的表面结构、性质、及催化性能等都发生了明显的变化。

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％。