查询词典 sulfuric acid

This experiment, the extract from fresh seaweed polysaccharide reference thermal flooding of alcohol, iodine waste material after the extraction of crude to fucose sulfate polysaccharide extraction, classification after the ethanol precipitation method used for crude and industrial pre-kelp dealing with separation of water purification, and anthrone-sulfuric acid method of its total sugar content.

本实验，采用从鲜海带中提取多糖的热水浸提法对醇、碘提取后的废弃料进行粗品岩藻多糖硫酸酯的提取，后采用乙醇分级沉淀法对粗品和工业海带预处理水进行纯化分离，并用硫酸蒽酮法测定其总含糖量。

In addition, the effects of temperature and concentration of sulfuric acid on the concentration of LA and 5-hydroxymethyl furfural were shown.

实验考察了不同温度和硫酸浓度对葡萄糖分解的主要产物5-羟甲基糠醛和乙酰丙酸浓度的影响。

In the test the rice halls, a new material of producing furfural, were hydrolyzed by sulfuric acid.

研究了糠醛生产的新原料-稻壳的硫酸水解试验。

Southerly chemical sodium salt reserves of the world's resources, in the chlor-alkali, on the application of a wide range of industries, sulfur prices, high cost of sulfuric acid, using Glauber's salt potassium sulfate system, such as the value of barium sulfate sulfate product is the most economical method, also developed chemical southerly "Dead Sea" floating black mud bath and leisure projects.

南风化工硫酸钠盐的资源储量居世界第一，在氯碱、日化行业中应用广泛，硫磺价格高涨，硫酸成本高，用芒硝制硫酸钾、硫酸钡等高值硫酸盐产品是最经济的方法，南风化工还开发"死海"漂浮和黑泥浴休闲度假项目。

The effect of different reaction conditions,such as catalyst concentration,molar ratio of reactants,reaction temperature,reaction time,on the coupling reaction of trioxane and methyl formate synthesizing methyl glycolate and methyl methoxy acetate using sulfuric acid as catalyst has been studied.Through the analysis for the yield of products and system pressure,and comparison with other different acidity catalysts,we considered that the activation of formaldehyde was the control step of reaction rate to the...

以硫酸为催化剂，研究了三聚甲醛与甲酸甲酯偶联合成乙醇酸甲酯和甲氧基乙酸甲酯的反应中，催化剂浓度、原料配比、反应温度、反应时间等条件对反应过程的影响，通过对产物收率和系统压力变化的分析，并结合与其它不同酸强度催化剂的对比，得到甲醛的活化是偶联反应的速率控制步骤，催化剂的酸强度决定其对甲醛的活化能力，是影响偶联反应的主要因素。

It is found that the concentration of sulfuric acid in liquid and the reaction temperature are the most sensitive factors for this process. Increasing the ratio of solid to liquid is disadvantageous for growth of crystals even though it does not effect obviously for the rate of dehydration of FGD gypsum. On the other hand,the more closed to the neutral range of pH value the liquid is adjusted,the better stability of the α-form calcium sulfate hemihydrate appear,the more favorable for modification of crystal habit the process is made.

研究中发现pH值和盐溶液浓度是影响FGD石膏脱水速度最敏感的因素，固液比虽然对脱水速度影响不大，但固液比增大对晶体生长和习性改良不利。pH值愈接近中性范围，愈能增强α半水石膏结晶在液相中的稳定性，有利于结晶习性改良。

Strong acids, such as sulfuric acid, hampered from the occurrence of the phenol hydroxylation.

过强的酸，如硫酸、硝酸和盐酸，对苯酚羟基化反应造成危害，使羟基化反应不能发生。

This article carried on 4 groups to the strong sulfuric acid hygroscopicity and the dehydration property to test.

本文对浓硫酸的吸水性和脱水性进行了4组实验，成功地利用微型化实验的手段对浓硫酸溶于水，浓硫酸吸收水分，浓硫酸与纸屑、棉花、木屑和蔗糖的反应进行了设计。

The propagation of non-sensitized IGC and the relation of IGC to potential values were investigated in sulfuric acid at ambient temperature.

用恒电位浸蚀方法在高压釜中研究了供货态316 L钢在尿素介质中发生非敏化态晶间腐蚀与电位区段的关系，并在常温硫酸溶液中研究了316 L钢非敏化态晶间腐蚀的发展过程及其与电位值的关系。

The present invention relates to method of preparing sulfuric acid with sulfur from gas turbine, and belongs to the field of inorganic chemical technology.

本发明涉及一种利用燃气轮机的硫磺制备硫酸的方法，属无机化工技术领域。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。