In this paper, the latest progress of the nitration of deactivated aromatic compounds is reviewed in the point of view of nitrating agents, including nitrate-sulfuric acid, nitrate ester, nitric acid and nitrogen oxides.
本文从硝化试剂角度综述了近年来钝化芳环的硝化反应的进展，包括硝酸盐/硫酸、硝酸酯、硝酸、氮氧化物等硝化方法。
After several years of corporate restructuring and rapid development, the factory has a 100, 000 tons/year sulfuric acid, 15, 000 tons/year of isobutene, 24, 500 tons/year activity polyisobutylene, 30, 000 tons/year MIBK, 2000 ton/year ethylene double Hard ester amide, such as 10 sets of chemical production equipment, production chemical additives, polymeric materials, catalysts and fuel intermediates four series more than 20 kinds of products.
经过几年的企业重组和快速发展，工厂拥有10万吨/年硫酸、1.5万吨/年异丁烯、2.45万吨/年高活性聚异丁烯、3万吨/年MIBK、2000吨/年乙撑双硬酯酰胺等10套化工生产装置，生产化工助剂、高分子材料、催化剂和燃料中间体四大系列20余种产品。
The optimum volume ratio of ester to fuming sulfuric acid is 7∶1, the optimum reaction time is 4h, and the optimum reaction temperature is 40℃.
最佳的反应条件为：油酯与发烟浓硫酸的体积比为7∶1；反应温度为40℃；反应时间为4h。
Sulfuric acid dimethyl ester, one of the important chemical raw materials acts as the methylating agent in the organic synthesis for the purpose of replacing alkyl halide.
硫酸二甲酯是一种重要的化工原料，在有机合成中用于代替卤代烷作为甲基化剂。
The study of extraction mechanism of indium with 2-ethylhexyl phosphonic acid mono (2-ethylhexyl) ester from sulfuric acid solution
用2-乙基己基膦酸单（2-乙基己基）酯自硫酸溶液中萃取铟的机理研究
The phosphoric ester sample was decomposed in nitric acid, sulfuric acid and perchloric acid and the components of inorganic phosphorus and combined phosphorus were determined by vanadium ammonium molybdate method with 721 type spectrophotometer.
将试样在硝酸、硫酸、高氯酸中分解，用钒钼酸铵法以721型分光光度计测定阴离子表面活性剂磷酸酯中的无机磷、结合磷的质量。
The products were not toxic and pyrogenic, and the hemolysis rates were all less than 5%. It proved that the anti-clotting properties of the products were improved with addition of sulfuric acid ester.
几种产物无毒，无热原，溶血率均小于5%，随着硫酸酯键的加入，产物的抗凝血性能得到改善。
The Study on Synthesize α - Methyl-Acrylic Acid Hexadecyl Ester Catalyzed by Sulfuric Acid and Application
硫酸催化合成α-甲基丙烯酸十六酯及应用研究
As to the high polarity, high boiling point resultant—trimesic acid, the analysis methods of infrared spetrum, gas chromatography-mass spectroscopy, vapour-phase chromatography, acid number titration and so on are seperately used to characterize its property. Infrared spetrum and gas chromatography-mass spectroscopy are used to have a qualitative analysis on the resultant and are compared with the stand diagram. Sulfuric acid-methanol esterification and rapid esterification are used to prepare the trimesic acid trimethyl-ester and have a FID quantitative analysis. So that we make sure the purity of trimesic acid in the resultant and also we have an acid alkali titration on the resultant to get its acid number, in order to verify the purity of trimesic acid in the resultant.
对于高极性、高沸点的固体产物均苯三甲酸，分别采用红外光谱、气质联用、气相色谱、酸值滴定等分析手段进行了表征：利用红外光谱、气质联用的方法进行产物的定性分析，并与在同一仪器、同一条件下做出的标准谱图进行比对；采用硫酸-甲醇酯化法和快速酯化法制备出均苯三甲酸三甲酯，对其进行气相色谱FID定量分析，进而确定固体产物中均苯三甲酸的纯度；用酸碱滴定法确定固体产物的酸值，以对固体产物中均苯三甲酸的纯度进行验证。
Pyridine-2-carboxylic acid methyl ester was synthesized by the esterification reaction of concentrated sulfuric acid-methanol whose yield was 86.1%, and thionyl chloride-methanol whose yield was 80.3% using pyridine-2-carboxylic acid as raw material.
以吡啶-2-羧酸为原料，分别采用浓硫酸-甲醇酯化法和二氯亚砜-甲醇酯化法合成吡啶-2-羧酸甲酯，两种方法的收率分别为86.1%和80.3%。
The immobilization of glucose oxidase on the crosslinked copolymer of allyl dextran and N, N'- methylenebisacrylamide (CADB) with the aid of p - β - sulfuric acid ester ethyl sulfone aniline (SESA) was investigated.
研究了以交联烯丙基葡聚糖凝胶（CADB）为载体和对－β－硫酸脂乙砜基苯胺（SESA）为偶联剂，采用化学键合法固定葡萄糖氧化酶的方法。
Preparation of Sulfuric Acid Dimethyl Ester
硫酸二甲酯的制备
Results The SiO2-ZrO2 composites were calcined at 200℃ prior to sulfating, the concentration of sulfuric acid was 1.0 mol/L, the molar ratio of Si and Zr was 15, the calcination temperature was 500℃, the molar ratio of ethynol and lactic acid is 3/1, the yield of the ester could reach 92.7%.
结果SO4^2-／SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应适宜的反应条件为：预焙烧温度为200℃，浸泡硫酸浓度为1.0mol／L，硅锆摩尔比为15，焙烧温度为500℃，醇酸比为3时，酯化率可达92.79／6。