无机化合物水解反应的基本规律

从有利教学出发，系统地归纳了无机化合物水解反应的基本规律。     

生产钛白的副产物硫酸亚铁的精制研究

本文采用还原、水解、絮凝法去除生产钛白的副产物硫酸亚铁中钛离子、杂质离子及悬浮物．研究发现在控制溶液ｐＨ３～６、水解温度７０℃、水解反应时间０．５ｈ和投加１ｍｇ／ｌ混凝剂的条件下，精制后的硫酸亚铁溶液中Ｔｉ离子浓度ＣＴｉ＜１×１０－６．     

The Use of Soluble Polymer in Enzyalc Reactions

1 Results Enzyme-mediated kinetic resolution of racemic esters is one of the practical methods for the preparation of optically active compounds. In the reaction process, the products and the substrates could be separated mainly by column chromatography. The most tedious and wasteful purification step is the bottleneck to a sustainable production. We already reported enantioselective hydrolysis of poly(ethylene glycol)(PEG)-supported carbonates which were soluble in some kinds of solvent[1-2]. Here, we ...     

Study on the Hydrolysis and Ammonolysis Kinetics of a Monochlorotriazinyl Reactive Dye

To understand the reaction behaviour of the reactive dye with amino groups on protein fibres, the reaction kinetics of competitive hydrolysis and ammonolysis of a monochlorotriazina reactive dye were studied at 50 -80℃ and pH = 8 - 10 by high performance liquid chromatography (HPLC). The results showed the pseudofirst-order phenomenon for the general reaction of concurrent hydrolysis and ammonolysis of the dyes. The ammonolysis reaction was always faster than the hydrolysis reaction in the range of temperature and pH employed, but the preference for ammonolysis to hydrolysis reaction decreased with the increase of temperature and pH value. The ratios of ammonolysis/hydrolysis rate constant reduced from 17.6 to 5.4 when the temperature increased from 50 to 80℃ in pH =10, and from 7.2 to 5.4 when the pH value increased from 8 to 10 at 80℃.     

恶唑烷类化合物水解过程中的线性关系

测定了２３种恶唑烷类化合物在水溶液中的水解速度常数Ｋｏｂｓ、离解常数Ｋａ和在有机溶剂硝基苯中的半中和点电位Ｅ１／２。并对其两两之间的线性关系进行了探讨。发现不但Ｋｏｂｓ、ＰＫａ和Ｅ１／２相互之间均具有线性关系，而且和Ｈａｍｍｅｔｔ电性常数σ之间也具有线性关系。     

Reaction of diaminoglyoxime and cyclic azine compounds in high temperature and pressure water

Diaminoglyoxime was reacted in water at 150-400℃ and at 27.5 MPa pressure in metal Ti tubing reactor. Experimental results indicate that, diaminoglyoxime can be converted into NH-3 and CO-2, either through direct hydrolysis or through pyrolysis and polymerization, and then further hydrolysis. The possible reaction mechanism is nucleophilic addition of water.     

纳米二氧化钛制备的形态控制

采用光子相关光谱法和ＴＥＭ分析对钛酸四丁酯（Ｔｉｔａｎｕｍ ｂｕｔｙｒａｔｅ以下简称ＴＮＢ）水解的成核－生长进行了研究。讨论了ｐＨ值、ＴＮＢ浓度以及水与钛酸四丁酯物质量之比对粒子成核－生长的影响，阐明了ｐＨ值、ＴＮＢ浓度与成核以及粒子形太民的关系，指出了溶液中溶质分子簇大小变化是导致一次核粒径改变的直接原因，给出了不同ｐＨ值下的成核－成长机理。     

用腈纶废料制备高吸水树脂

为了促进废旧高分子物质的综合利用，通过腈纶废料的水解和交联反应制备了高吸水树脂，并测试了其吸水能力。实验初步优选出的制备条件为：在120℃进行水解反应，每克腈纶废料配合0．32克氢氧化钠。所试用的几种交联剂按其效果优劣排序为：聚乙二醇、甲醛、甘油、硫酸铝钾、重铬酸钾。其中聚乙二醇与丙烯腈的最佳质量比为2．4：1000。     

Determination of isocarbophos by cathodically sweeping oscilliopolarography

Determination of isocarbophos by cathodically sweeping oscilliopolarography is described. In a 1.0×10⁻⁵ mol/L sodium dodecylbenzene sulfonate (SDS)+0.1 mol/L HAC-NaAC (pH=4.0) buffer medium, isocarbophos and its alkaline hydrolysate exhibited sensitive second derivative wave at −0.50 V and −0.48 V respectively. The peak current was linearly proportional to the concentration of isocarbophos in the range of 5.40×10⁻⁶−1.05×10⁻⁴ mol/L by detecting isocarbophos directly. The detection limit was 3.60×10⁻⁶ mol/L with the relative standard derivation (RSD) of 7.3%. By employing an alkaline hydrolysis, the peak current was linearly proportional to the concentration of isocarbophos in the range from 7.70×10⁻⁷ mol/L to 1.24×10⁻⁴ mol/L, and the detection limit was 5.80×10⁻⁷ mol/L with RSD of 3.1%. The hydrolysis procedure and the electrode reaction were studied by voltammetry. Foundation item: Supported by the Foundation of Chinese-France Cooperation Program on Advanced Research Biography: ZHANG Wu-ming (1929-), female, Professor.     

Hydrolysis of carboxylate ester catalyzed by a new artificial abzyme based on molecularly imprinted polymer

A new kind of artificial abzyme MIP-3, which contains N-phenyl benzonic amide group and “nanochannel” formed by embedded ZnO nano materials, and is imprinted by a transition-state analogue of p-nitrophenyl methyphosphonate in the hydrolysis of p-nitrophenyl acetate, was prepared by radical co-polymerization. Hydrolytic kinetics of p-nitrophenyl carboxylate catalyzed by MIP-3 was investigated. The results showed that the artificial abzyme exhibited notable substructure selectivity and strong catalytic ability in hydrolysis of p-nitrophenyl acetate