查询词典 sulfuric acid

The experimental results of cyclic operation indicate that, sulfuric acid concentration in feed solutions decreases and sulfuric acid concentration in dialyzate increases in the operational process, furthermore, rejection ratio of rare earth is very high, and DD can achieve the purpose of sulfuric acid separation from rare earth sulfate solutions.

循环式结果表明，渗析过程中，料液中硫酸浓度不断减小，而渗析液硫酸浓度不断增大，而且由于对稀土具有较高的截留率，扩散渗析法能达到硫酸与稀土有效分离的目的。

The effect of flow rates, initial concentrations, resin bed heights, its height/ diameter ratios and temperature on breakthrough curves of sulfuric acid/2-naphthalenesulphonic acid, 2-naphthalenesulphonic acid/sulfurous acid and sulfuric acid/ 2-naphthalenesulphonic acid/sulfurous acid systems was investigated. Excellent agreement was obtained between experimental data and the suggested breakthrough data model, with which the breakthrough curves can be accurately predicted for multi-component adsorptive separation in resin bed, the experiment of adsorptive separation may be scaled up, and the plant may be designed.

考察了流速，初始浓度，床层高度，床层高径比，温度等因素对硫酸-2-萘磺酸，2-萘磺酸-亚硫酸和硫酸-2-萘磺酸-亚硫酸等混合体系穿透曲线的影响，所建立的穿透曲线模型与实验结果拟合较好，模型可较准确预测多组分吸附分离的穿透曲线，可用于指导吸附分离实验的放大以及装置的设计。

Based on this result, a new technology is suggested, that is by regulating the effective sulphonating contents of 1-amino-anthraquinone, adjusting the concentration of sulfuric acid to hydrolyze 1-amino-anthraquinone disulfonic acid conversing to 1-amino-anthraquinone -2-sulfonic acid, and briminating the hydrolyzed product in 100% sulfuric acid, 87% yield of Bromamino-acid was achieved, 10% higher than the conventional method prepared by "oleum method".

此新工艺，溴氨酸在产物中含量可达87％，比常规的发烟硫酸法生产溴氨酸提高了10％，质量和收率都接近或达到溶剂法生产的水平。 1，5-二硝基蒽醌和1，8-二硝基蒽醌是生产分散蓝56、分散蓝73等一系列分散染料重要中间体。

Thiol groups were good to be used in functionalizing gold nanoparticles, and ester bond formation and breakage played the major role in this research. Thioctic acid and 11-mercapto-1-undecanol were used to functionalize the gold nanoparticles and form ester bond by using the carboxylic acid group on thioctic acid and the hydroxyl group on 11-mercapto-1-undecanol. Concentrated sulfuric acid was used to be the catalyst in this reaction, and sodium hydroxide was added for the proceeding of the reverse reaction.

硫醇官能基在金奈米粒子的修饰有很好的效果，利用带有硫醇官能基之tioctic acid 与11-mercapto-1-undecanol (11-MUDO)分子修饰在金奈米粒子上，并使TA上之羧基和11-MUDO上之羟基脱水生成酯化键，浓硫酸则是反应中的催化剂，而氢氧化钠则可促使系统进行逆反应。

Therefore can pass to use the cupric sulfate sulfuric acid potassium for the catalyst take sulfuric acid as to carry the body to digest it, make the amino acids chelate match the conversion for dissolve sex easily of ammonium sulfate and white vitriol, then absorb a fixed amount to try the kind to join 40% sodium hydroside combine under the steam heat function make ammonia the spirit swims to leave out, through cool off to respond the born boric acid with boric acid, be got the total nitrogen content by the standard aqua titration of hydrochloric acid immediately after;But the white vitriol can immediately join the hydrochloric acid hydroxylate , fluoride to turn the in order to cover up, carry on the titration but get the content of its zinc with the EDTA mark liquid..

因此可以通过用硫酸铜硫酸钾为催化剂以硫酸为载体将其消化，使氨基酸螯合锌转化为易溶性的硫酸铵和硫酸锌，然后吸取一定量的试样加入40 %的氢氧化钠并在水蒸气高温作用下使氨气游离出来，经冷却与硼酸反应生成硼酸铵，接着由盐酸标准溶液滴定得到总氮含量；而硫酸锌即可加入盐酸羟铵、氟化氢铵为掩蔽剂，用EDTA标液进行滴定而得到其锌的含量。

As for acetalation, we research the effects of acid kinds, acid quantity, temperature solvents on it and get the conclusions that the optimized acid is sulfuric acid, the optimized temperature is 65 °C, the reaction time is five hours, and the material ratio of sulfuric acid to methylglyoxal to methanol is 0.028:1:6.837.

在醛保护一步中，研究了酸种类、酸用量、温度及其溶剂的影响，得到了本反应的较好条件是：酸为浓硫酸，反应温度为65℃，反应时间为5小时，浓硫酸：丙酮醛：甲醇的配比为0.028：1：6.837，反应收率可达81%。

The results show that magnesium and aluminum theoretically can be thoroughly dissolved from the blast furnace slag by diluted sulfuric acid pretreatment on the blast furnace slag even if the ended concentration of sulfuric acid is 0.001mol/L, while the titanium basically could not be dissolved. Therefore it is theoretically indicated that the separation of the magnesium and aluminum from the slag with the least titanium loss by diluted sulfuric acid pretreatment is possible.

结果表明，采用稀硫酸对高炉渣进行预处理，当终酸浓度即使为0.001mol·l~(-1)时，镁、铝理论上也能全部被酸浸出，而钛在0.001 mol·l~(-1)的酸浓度条件下基本不被浸出，从而从理论上可以说明对高炉渣采用稀酸预处理可以很好的将炉渣中的镁、铝等杂质分离出来，而钛极少被浸出。

Finally, industrial policy for sulfuric acid industry in China is given: using reasonably both international and domestic sulfuric sources; developing vigorously and steadily the process of sulfuric acid production from sulfur; enhancing recovery and utilization of effluent gases from non-ferrous metal smeltery and combination sulfuric sources with non-ferrous metal mine; maintaining production capacity and output with iron pyrite as raw material; strengthening home-built work for large-scale sulfuric acid plant.

最后阐述我国硫酸工业的产业政策：合理利用国际，国内两种资源，积极稳妥地发展硫磺制酸；加强冶炼烟气制酸和有色金属伴生硫资源的回收和利用；稳定硫铁矿制酸能力和产量；加强大型硫酸装置国产化工作。

JNS sulfuric-acid-dew-point-resistance steel has been put into practical use in the construction of steel-covered chimneys of the following electric power-generating stations: Zou xian Power Plant （2 1000 MW）, Xiamen Songyu Power Plant （2 300 MW）, Fujian Nanpu Power Plant（2 300MW）,Shenzhen Power Plant （2 300MW）. Many experienced experts held discussions with designers at scene and reached a unanimous conclusion that "JNS sulfuric-acid-dew-point-corrosion -resistance steel " is more stable in terms of function, more convenient to weld and process and more safe to use than " past sulfuric-acid-dew-point-resistance steel". Reports from various laboratories demonstrate that "JNS sulfuric-acid-dew-point-corrosion -resistance steel " is more effective to resist acid corrosion than the former steel , and many exports predict after thorough study that this acid of steel have a life span longer than 30 years being used in de-sulfurized chimneys and it is much less expensive than titanium alloy clad plates and Peenguard, etc.

JNS耐硫酸露点腐蚀钢板在山东邹县发电厂（2 1000 MW）、江苏泰州发电厂（2 1000 MW）、上海外高桥发电厂（2 1000 MW）、山西漳山发电厂（2 600 MW）、厦门嵩屿发电厂（2 300 MW）、福建南埔发电厂（2 300MW）、河北怀安发电厂（2 300MW）、吉林通化热电厂（2 300MW）等众多工程的烟囱钢套筒工程中得到了实际应用，许多老专家会同设计人员一起现场论证，一致认为&JNS耐硫酸露点腐蚀钢板&比以往的&耐硫酸露点钢板&性能更稳定，焊接更方便，更容易加工，使用更安全，来自各实验室的报告显示，&JNS耐硫酸露点腐蚀钢板&的耐酸性能也超过了过去的&耐硫酸露点钢板&，很多专家经过充分论证后预言，该钢种在脱硫后的烟囱中连续使用可保证三十年以上，而且JNS钢板的价格也远远低于钛合金复合板、宾高德等，采用JNS耐硫酸露点腐蚀钢板，可为电厂节约巨大投资，具有良好的经济效益和社会效益。

Test Preparation Transfer about 2 g of the substance under test, accurately weighed, to a glass-stoppered, 250-mL conical flask, add 20 mL of a mixture of equal volumes of nitric acid and sulfuric acid, attach a suitable condenser, reflux the mixture for 1 hour, cool, cautiously dilute with water, and boil until fumes of nitrous acid no longer are noticeable.

Test准备 Transfer大约2 g在测试之下的物质，准确地被称，对玻璃防止， 250ml conical烧瓶，增加硝酸的相等的容量混合物的20 mL，并且硫酸，附有一适当的 condenser，循环加热混合物1个小时，凉快，慎重地稀释与直到亚硝酸发烟的水和煮沸 acid不再是引人注目的。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失