查询词典 catalysts

Some typical newly catalysts, such as sulfoacid, inorganics, solid superacids, etc on the reaction of p-hydroxybenzoic esters was summed up especially introduce heteropoly acid catalyst.

总结了磺酸、无机物、固体超强酸等几种典型的合成对羟基苯甲酸酯反应的新型催化剂，重点介绍了杂多酸催化合成对羟基苯甲酸酯。

The time of sulfurization is shorter, the temperature of bed layer is stable, and the activity of catalyst is high, while it is used for the sulfurization of Co-Mo catalysts.

进行钴—钼系催化剂硫化，具有硫化时间短，床层温度平稳等特点，且催化剂可获更高活性。

In this dissertation, we propose the new idea of endowing magnetism with solid superacid catalysts. Application of the magnetic superacid catalyst in esterification gives very good results.

本文提出了合成出磁性固体超强酸催化剂的新思想，并应用于酯化反应中，取得了一定的成果。

The reactions of linear alkanes on SO~4^2-/ZrO~2 solid superacid catalysts were studied.

本文考察了SO~4^2-/ZrO~2固体超强酸催化剂上正构烷烃的反应及影响催化剂活性和选择性和各种因素。

The results showed that Au doping did not affect the texture properties of La0.8Sr0.2MnO3, but Au actually enhanced the surficial oxygen mobility of catalysts, and increased catalytic oxidation activity at a low temperature.

结果表明，Au掺杂并不改变La0.8Sr0.2MnO3催化剂的织构性质，但明显增强了催化剂表面氧的活动性，提高了其低温催化氧化活性。

A new technology to synthetize trans-1,4-polyisoprene with bulk precipitation polymerization in the presence of supported Titanium catalysts was introduced, and the technogical process , its economical and qualty index were discussed.

简要介绍了采用负载钛体系催化异戊二烯本体沉淀聚合法合成高反式-1，4-聚异戊二烯的新技术、工艺流程和技术经济指标。

The influences of composition and structure of catalysts and cracking conditions on catalytic activity are also discussed. Further key study areas in catalytic cracking of tars are presented.

分析了不同催化剂的优缺点及催化机理，讨论了催化剂的组成、结构以及催化裂解条件对催化效果的影响，展望了未来焦油催化裂解的研究重点。

The investigation of reaction kineties of tetralin hydrocraking on modified Molyblenum-Nickel catalysts with zeolite Y were conducted in the improved China-made continuous micro reactoe WF-8900 connected with gas chromatograph on-line.

在活性趋于稳定的以改性Y沸石为担体的钼镍催化剂上，利用经改造的国产WF—8900型连续流动微反-色谱装置，进行了四氢萘加氢裂化反应动力学方面的研究。

In the presence of the phase transfer catalysts such as tetramethylammonium bromide, tetraethylammonium bromide or polyethylene glycol(MW 400 and 6,000),lithium hydroxide is the best alkali among lithium hydroxide ,sodium hydroxide and potassium hydroxide.

研究表明在溴化四甲基铵、溴化四乙基铵、聚乙二醇（分子量为6，000）和聚乙二醇（分子量为400）相转移催化体系中，氢氧化锂最好，氢氧化钾次之，氢氧化钠最次。

Mercaptopropyl methyldimethoxysilane was synthesized by thiourea in the presence of tetramethylammonium iodine as a catalyst and mixed liquid containing ethylenediamine and trichloroethylene as a neutralizer, without solvent, in which the reaction temperature, catalysts ,neutralizer and their amounts were optimized.

以四甲基碘化铵为催化剂，乙二胺和三氯乙烯的复合液为中和剂，在无溶剂体系中，用硫脲法合成了甲基巯丙基二甲氧基硅烷。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐