查询词典 hydroxide

Veratrum aldehyde synthesis of many drugs intermediates, methyl aldehyde method for raw materials in Champlain, after dimethyl sulfate methylation available to 20% sodium hydroxide as the solvent, 10-11 in the PH value of the under the conditions of synthesis; microwave irradiation is the use of microwave radiation heating to replace the traditional approach to synthesis of a product of methylation reactions, this method does not require solvents, and less by-products, but still need to use 15% sodium hydroxide to adjust pH.

藜芦醛是许多药物合成的中间体，甲基化法以香兰醛为原料，经过硫酸二甲酯甲基化可得，以20%氢氧化钠为溶剂，在PH值为10-11的条件下合成；微波辐射法是利用微波辐射代替传统加热方式进行甲基化反应合成产物，这种方法不需要溶剂，并且副产物少，但仍需要用15%氢氧化钠来调节酸碱度。

As a result, the processing of wulfenite leaching by sodium hydroxide is carried out. Additionally, feasibility of the processing of wulfenite leaching by sodium hydroxide is proved, but Pb2+ reacts with hydroxyl to form complexes which is leached into solutions. So removing the complexes lead from solution is needed.

通过对Pb-Mo-H2O系的热力学分析，苛性钠分解彩钼铅矿在一定的pH值下是可行的，但在碱分解过程中Pb2+与羟基形成了配合物，主要是以的形式存在而大量进入溶液，因此，尚需进一步除铅。

In the third area, Pb2 is gradually supersaturated in solution with the increase of pH value, so the Pb2 is deposited as sediment. As a result, the processing of wulfenite leaching by sodium hydroxide is carried out. Additionally, feasibility of the processing of wulfenite leaching by sodium hydroxide is proved, but Pb(superscript 2+) reacts with hydroxyl to form complexes which is leached into solutions. So removing the complexes lead from solution is needed.

通过对Pb-Mo-H2O系的热力学分析，苛性钠分解彩钼铅矿在一定的pH值下是可行的，但在碱分解过程中Pb(上标 2+)与羟基形成了配合物，主要是以Pb3的形式存在而大量进入溶液，因此，尚需进一步除铅。

The main steps include as follows: CO2 is led into the mother liquor of sodium meta-aluminate to carry out carbon content decomposing; the primary separation between the aluminum and the gallium is realized by primary carbonatation to filter out sodium hydroxide; secondary carbonatation is carried out on the filtrate to obtain the deposit of the complex salt of gallium and aluminum; a sodium carbonate crystal is obtained after the filtered filtrate is condensed and vaporized; the deposit of the complex salt of gallium and aluminum is dissolved in the mother liquor of sodium meta-aluminate; the processes are repeated until the proportion of gallium and aluminum in the complex salt of gallium and aluminum is larger than 1/340; then the complex salt of gallium and aluminum is added into the NaOH liquor and electrolyzed, thus obtaining the metal gallium with a purity larger than 99.9 percent which reaches the level of 3; simultaneously, the byproducts of the aluminum hydroxide and the sodium carbonate during the process of carbonatation by steps are obtained.

主要步骤包括：向铝酸钠母液中通入CO 2 进行碳分分解，一次碳酸化实现铝镓的初次分离；过滤出氢氧化钠，滤液进行二次碳酸化获得镓铝复盐沉淀，过滤后滤液经浓缩蒸发获得碳酸钠晶体，铝镓复盐沉淀溶解在偏铝酸钠母液中，重复上述过程直至铝镓复盐中的镓铝比例大于1/340，将其加入到NaOH溶液中，电解可获得纯度＞99.9％的金属镓，达到3N级水平同时在分步碳酸化的过程中获得氢氧化铝和碳酸钠副产品。

A novel type of composite electrode based on multiwalled carbon nanotubes coated with sheet-like cobalt hydroxide particles was used in supercapacitors. Cobalt hydroxide cathodically deposited from Co(NO3)2 solution with carbon nanotubes as matrix exhibited large pseudo-capacitance of 322 F/g in 1 mol/L KOH.

采用电化学阴极沉积还原Co(NO3)2的方法制备了具有准电容特性的氧化钴电极材料，其比容量达到280 F／g，采用CNTs作为电极基体，在其表面均匀的沉积了纳米钴化镍颗粒并由此制备了氧化钴碳纳米管复合电极材料。

Based on traditional technology of light alkaline bydrolysis,sodium hydroxide and sodium chloride in original technology will be replaced by potassium hydroxide and potassium nitrate differently.Extraction of fish oil is done in the temperature of 65℃,70℃, 75℃,80℃,85℃,90℃and95℃ in turn in the condition of pH8.0,55mins in hydrolyzing,20mins in salting out with 4.5 percent of potassium nitrate and 30mins in centrifugalization with 3000r/min.

在传统淡碱水解工艺的基础上，将氢氧化钾和硝酸钾分别替换原工艺中的氢氧化钠和氯化钠，在pH8.0、水解时间55min、用4.5%的硝酸钾盐析30min、用3000转的离心机离心30min的条件下，分别在65℃、70℃、75℃、80℃、85℃、90℃、95℃时提取粗鱼油。

The adsorption characteristics of arsenic in water by cerous hydroxide were studied.The results showed that cerous hydroxide had well adsorption effect for trivalent arsenic and pentavalent arsenic.

研究了氢氧化铈对水中砷的吸附特性，结果表明：氢氧化铈对As和As均有良好的吸附效果，其吸附等温线能很好地用Langmuir方程描述。

The chemical structure of the product was characterized by means of the melting point and IR. The results show that tetraethylammonium bromide which was used as a phase transfer catalyst in this reaction had optimization effect on the interfacial diffusive reaction of BTC and PNP. Higher concentration of sodium hydroxide, lower temperature and a higher dosage of BTC produced a small amount of 4-nitrophenyl chloroformate, while lower concentration of sodium hydroxide and a lower dosage of BTC made reaction incomplete, which affected the yield.

结果表明，在碳酸二（4-硝基苯基）酯合成中使用的相转移催化剂四乙基溴化铵对受界面扩散控制的BTC气与对硝基酚钠反应有良好的相转移催化效果；氢氧化钠质量分数较低时，酚钠盐向溶有BTC的油相扩散速度较小，较高时会产生氯甲酸对硝基苯酯；温度较低、BTC量较高时，会产生少量氯甲酸对硝基苯酯，BTC用量较低会使反应不完全，这些都影响着收率。

The effects of four factors such as temperature,sodium hydroxide concentration,time and ratio of material to sodium hydroxide solution on the yield of polysaccharide from Evodia rutaecarpa Benth were investigated,and these factors were optimized through orthogonal test.

本实验采用正交设计研究了提取温度、提取时间、料液比和NaOH浓度等对用碱法提取吴茱萸中多糖得率的影响。结果表明，影响最为显著的因素是料液比，最佳提取工艺条件为提取温度80℃、NaOH浓度0.6mol/L、料液比1：20、提取时间3h，此时多糖提取率为12.58%。

Moreover, the crossed experiment has been performed to determine the optimum condition: the molar ratio of glyoxylic acid to o-ethoxyphenol to sodium hydroxide 1.0:1.2:2.5, sodium hydroxide concentration 2mol/L, temperature 50℃, time 5h.

通过正交实验确定了合成的最佳条件：n：n：n=1.0：1.2：2.5，氢氧化钠浓度2mol/L，温度50℃，时间5h。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。