查询词典 hydrogenation

Production of epsilon-glycolylnium is carried out by Beckman rearrangement reacting for cyclohexanone-oxime under the existence of solvent to obtain epsilon-glycolylnium contained mixture, crystalline separating for the mixture to obtain crude epsilon-glycolylnium crystal, dissolving by arene, extracting by water, adsorbing by resin hydrogenation catalyzing to obtain the final product. The value of potassium permanganate is less than 5, extinction value is less 0.05, volatile alkali is less than 0.5meq/kg and alkalinity is less than 0.05meq/kg.

本发明涉及一种ε―己内酰胺制备方法，其特征为：在溶剂存在下，环己酮肟经贝克曼重排反应，得到含有ε―己内酰胺的混合物，该混合物结晶分离后，得到粗ε―己内酰胺晶体用芳烃溶解，然后用水萃取，再经树脂吸附、催化加氢后，得到99.995％以上的高纯度的ε―己内酰胺，其质量指标为高锰酸钾值小于5，消光值小于0.05，挥发性碱小于0.5meq/kg，碱度小于0.05meq/kg。

The influence factors of SO2 in tail gas emission are analyzed and adjusted; the effective methods to reduce the content of SO2 in tail gas emission arc summarized from the aspects such as how to improve the conversion rate of sulfur, enhance tail gas hydrogenation effects and ensure the normal operation of the tail gas absorption unit.

通过从如何提高硫磺回收率、增加尾气加氢效果以及保证尾气吸收单元的正常运行等方面入手，对影响尾气SO2排放的各个因素进行分析调整，总结出了降低尾气排烟SO2含量的有效方法。

This technique is provided by an American doctor to produce gas silicon hydride through hydrogenation-reduction method with a purity of 6.5N (99.99995%).

本项目生产技术由美籍博士提供，采用氢化还原法生产纯度达到6.5N（99.99995%）的硅烷气体。

The metals, such as Fe, Cu and Co, which can be reduced by KBH〓, can not change the catalytic properties obviously if only small amount of them are added to Ni-B alloys; those who can not react with KBH〓, such as Zn〓, are washed out during the preparation, so they also can not change the catalytic properties; while addition of the elements in VIB group, such as Cr, Mo and W, can increase the hydrogenation activity magnificently.

同样，我们通过添加第三组分来修饰Ni-B合金，可以被还原的金属，如Fe、Co、Cu等，少量添加并不能明显改变其反应性能；而与KBH〓不发生反应的金属，如Zn，以离子形式加入后，除了少量离子被吸附在催化剂表面外，基本不残留在催化剂里，因此对反应性能也没有太大的改变；只有VIB族元素，如Cr、Mo、W的加入才会很大改进Ni-B催化剂在蒽醌加氢中的催化性能，尤以Cr的修饰作用最好。

First, the second category of professional pressure vessel design, manufacturing company specializes in designing and manufacturing various specifications strong magnetic coupling blender, stir strong magnetic coupling of high pressure - reactor, hydrogenation reactor, polymerizer, magnetic glass kettle, ultrahigh-pressure cauldron of hot water, Sulfide cans, refined liu kettle, autoclave reactor, pipeline reactor, mechanical seal reactor and its associated pressure tank, the condenser, Tajikistan, etc., its structure, low-pressure high school, heating, stirring form, the changes in speed, automatic Can be controlled by standard or as requested by users of matching custom, the main material 0 Gr18Ni9 (304), 0Gr18Ni10Ti (321), 0 0Gr17Ni14Mo2 (316L / 2 Mo Ti), and other trademark stainless steel, titanium, Hastelloy alloy, Study Nile because of alloys, nickel-wood, wood of Zirconium, tantalum wood, silver material, of tetrafluoroethylene, carbon steel, and composite materials as its use of composite panels made of.

一、二类压力容器专业设计、制造公司专业设计制造各种规格强磁力偶合搅拌器、强磁力偶合搅拌高压—反应釜、氢化釜、聚合釜、磁力玻璃釜、超高压水热合成釜，硫化罐、精镏釜、蒸压釜、管道反应器、机械密封釜，及与其配套的压力罐、冷凝器、塔器等，其结构形式、高中低压、加热方式、搅拌形式、转速变化、自动控制均可按标准或按用户工艺要求进行选配定制，主体选材0Gr18Ni9（304）、 0Gr18Ni10Ti（321）、0 0Gr17Ni14Mo2（316L/钼二钛）等各种牌号不锈钢、钛材、哈氏合金、因考耐尔合金、镍材、锆材、钽材、银材、四氟存里、碳钢等，及用其材料复合成的复合板制成。

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。

Methyl isobutyl ketone is a good origanic slovent and the advanced process for producing MIBK is one-step synthesis by gas-phase condensation and hydrogenation of acetone. In this process, the key technology is to develop the multi-fuctional catalyst, which has both the ability of hydrogenateon and condensation, as well as suitable acid-base sites.

甲基异丁基酮是一种优良的有机溶剂，先进的生产方法是丙酮气相缩合加氢一步法，该工艺关键的技术是开发高效的双功能催化剂，即催化剂同时具有缩合、加氢以及适宜的酸、碱性质。

Hydrogenation of carbon dioxide to formic acid was investigated over these catalysts in CO2-expanded solvent and no by-product is detected.

在CO2&膨胀&的溶剂中，研究了此Ru基催化剂上的二氧化碳加氢制备甲酸的反应。

The activity of benzene hydrogenation decreased with an increase of the Zn content.

苯的氢化反应活性随锌的含量增加而降低，但环己烯的选择率与产率随锌的含量增加而增加。

This dissertation is concerned with the approaches to a new high density liquid fuel, tetrahydrotricyclopentadiene, which can be synthesized with dicyclopentadiene as raw materials by three steps: Diels-Alder reaction, separation and hydrogenation. The main points of the paper are listed as follows.

本文以双环戊二烯为原料，通过双烯加成、分离、加氢反应得到目的产物——新型高密度液体燃料四氢三环戊二烯，主要研究内容包括： 1。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48