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- REGIOSELECTIVE SULFATION FOR MODIFICATION OF MICROCRYSTALLINE CELLULOSE AND ITS STRUCTURAL CHARACTERIZATION 微晶纤维素的定向硫酸酯化修饰及其结构表征
- Keywords microcrystalline cellulose;regioselective sulfation;structural characterization; 微晶纤维素;定向硫酸酯化;结构表征;
- regioselective sulfation 定向硫酸酯化
- It is found that the catalytic activities are greatly enhanced after sulfation. 结果发现,载体表面硫酸化后催化剂的活性大大增加。
- Up to now it is impossible to prevevt the sulfation from the NO2 adsorber completely. 到目前为止,也不可能使NO_4吸附器上完全无硫酸盐生成。
- The result shows that the cocatalyst system is especially effective in regioselective ortho dichlorination of the substrate. 结果表明，硫化物-三氯化铝共催化剂能显著提高该底物邻二氯代的区域选择性。
- The influence of compounds structure,catalyst,solvent and accessory ingredient on regioselective hydrosilation is summarized in this article. 综述了化合物结构、催化剂、溶剂及助剂等因素对硅氢加成反应区域选择性的影响。
- The failure mode includes positive grid corrosion, sulfation, runaway, negative strap corrosion and short circuit etc. 其形式通常有正板栅腐蚀、不可逆硫酸盐化、热失控、负极汇流排腐蚀、晶枝短路等。
- The effects of high CO2 concentration condition on sulfation behavior of calcium-based sorbent was investigated. 本文进行了高CO2浓度下钙基吸收剂脱硫的实验研究。
- Wastes represent good pore structure characteristics.This makes the sulfation reaction goes further. 废弃物具有良好的微观结构，有利于颗粒内部固硫反应的进行。
- Alltrans farnesol was synthesized through six steps starting from geraniol in an overall yield of 30%.The key step was the regioselective alkylation of methyl isopropyl ketone. 以香叶醇为起始原料，经6步反应，以总收率30%25完成了全反式法呢醇的全合成.;合成的关键步骤是甲基异丙酮的区域选择性烷基化
- Sulfation is a residual term that came into existence during the early days of lead-acid battery development. 硫酸盐化是铅酸电池发明之初就出现并遗留至今的术语,它被用来解释和证实铅酸电池退化和失效的可能性。
- This reviews deals with recent advances in the investigation of ionic liquids applied in the field of chemoselective, regioselective, stereoselective organic reactions. 本文综述了近几年离子液体在化学选择性、区域选择性和立体选择性有机合成中的应用。
- Then,the regioselective ortho lithiation of alkyloxypyridine bromide was further performed to produce the diphenylphosphine alkyloxypyridine bromide derivatives(3a,3b and 6a). 以氯代吡啶为原料,经烷氧基取代,选择性单溴代,合成了系列烷氧基溴代吡啶,最后利用锂化反应的区域选择性,制备了二苯基膦烷氧基溴代吡啶;
- The regioselective nitration of toluene and chlorobenzene with nitrates and supported nitrates on solid acid catalysts and supports in the presence of acetic anhydride is studied. 该文讨论了应用固体酸催化剂和载体，在醋酐存在下，采用硝酸盐和载体硝酸盐硝化甲苯和氯苯的选择性。 8种金属硝酸盐中，硝酸铜表现好的硝化特性。
- In the present paper,principle and producing technology of sulfation preparing fatliquoring agents for leather industry are summarised. 本文总结了硫酸化技术制备皮革加脂剂的原理、生产技术与进展。
- There are many arguments about this reaction, and, diffusion in sulfation product layer is one of the most difficult to understand. 此反应目前争议较多的为硫化反应产物层中的扩散物质种类问题。
- The influence of leakage oxygen, organic sulphur, sulfation and other conditions to the sulphur recovery catalyst was briefly introduced in this paper. 简要介绍了漏氧、有机硫、硫酸盐化及其它几种条件对硫磺回收催化剂的影响;
- In spite of their lower energy density, lead acid batteries are much more economical, but they are prone to sulfation in HEV applications. 然而具有储存能源能力之二次电池则为此问题的解决方案之一。由于新兴科技产品-磷酸锂铁电池为目前所有大型二次电池之中，性能最优异者。
- Also, it maybe provides the further evidence for the solid-state ions diffusion in sulfation product for the direct sulfation of limestone. 这也给石灰石直接硫化反应产物层中固态离子扩散理论提供了进一步的依据。
