查询词典 ethyl

When the heterogeneous catalyst is used in the asymmetric catalytic hydrogenation reaction of ethyl pyruvate under the room temperature and the medium hydrogen pressure, high activity and optical selectivity more than 70 percent are obtained in acetic acid solution, and the heterogeneous catalyst can be repeatedly used for more than 15 times.

本发明提供的催化剂在室温、中等氢压力下用于丙酮酸乙酯的不对称催化氢化反应时在乙酸溶剂中可得到高活性和超过70％的光学选择性，且可以重复使用15次以上。

Microwave irradiation is used to the synthesis of L-glutamic acid-γ-ethyl ester from L-glutamic acid and alcohol by using oil of vitriol as a catalyst.

对L-谷氨酸－γ-乙基酯的微波合成方法进行研究，采用HPLC法进行分析测定。

This also shows that not the kind of solvent on the solubility of all the ink is very good cordial when, of course, also include acetone and methyl ethyl ketone.

这也表明不是哪种溶剂对所有墨水的溶解能力都是很好的和洽当的，当然也包括丙酮和丁酮。

Keywords: methyl ethyl ketone, market, technology, economic evaluation

从技术经济评价角度分析，本项目也有一定的抗风险能力，在经济上是可行的。

The production technology and development of methyl ethyl ketone at home and abroad are introduced and its present production situation and market demand are analyzed also.

介绍国内外甲乙酮生产技术及发展，并对国内外的生产现状和市场需求进行分析。2004年全球甲乙酮产能约130万t/a，总需求量约为100万t/a。

In 2004 the global production capacity of methyl ethyl ketone was about 1.3 million tons, total demand was 1 million tons.

截至2005年上半年，我国甲乙酮的总生产能力约为21万t/a；预计2007年我国甲乙酮的总生产能力将达30·0万t/a，总需求量将达到约29·0万t，2010年产能将达35·0万t/a，需求将达到34·5万t。

"BUNa-N should not be used in highly polar solvents such as acetone and methyl ethyl ketone, nor should it be used in chlorinated hydrocarbons, ozone or nitro hydrocarbons."

丁腈橡胶不能在高极性溶剂里使用，如丙酮和甲基·乙基酮；此外，也不能在氯化烃、臭氧或硝基烃中使用。

Polystyrene/poly was studied after the thin films were prepared on a glass substrate by spin-coating from tetrahydrofuran and methyl ethyl ketone respectively.

采用原子力显微镜观测了由四氢呋喃和2-丁酮分别作为共溶剂制备得到的聚苯乙烯／聚甲基丙烯酸甲酯共混物薄膜的表面形貌。

Aircraft maintenance workers constantly expose to high noise and organic solvents, such as n-hexane and methyl ethyl ketone at work.

飞机维修人员为噪音高暴露族群，其职场环境亦有机溶剂如正己烷、丁酮之暴露。

BC-DH2004 catalyst was used in dehydrogenation of sec-butyl alcoholto prepare methyl ethyl ketone.

采用BC-DH2004催化剂进行仲丁醇脱氢合成甲乙酮的研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。