查询词典 acid process

As an environmental and safe edible acid,the L-appleacid is widely used in the edible acerb agent,grocery process,edible additive process,medicine industry,chemical industry concerned with products for daily use and so on.

300吨L-苹果酸，绿色的安全食品酸，广泛用作食品酸味剂，食品加工，食品添加剂加工，医药工业，日用化工及化学工业，其用途广泛，目前有很好的市场发展前景。

In order to industrialize the organic acid pulping process, more research on process simulation and optimization is necessary.

有机酸制浆要实现工业化，需在原料开发、流程模拟和优化等方面进一歩深入研究。

It was found that high reclaiming cost was required for the process catalyzed by sulfuric acid or ammonium hydroxide, and the process of PET hydrolysis at high temperature showed profitable.

此外，以氢氧化铵或以硫酸催化程序中必须消耗多量硫酸，及产生石膏或硫酸铵废弃物，因而所需的操作费用较高。

The influence and effect of boracic acid,glue and wetting agent during nickel electrolysis cathodic process were studied and the method of on-line control in nickel electrolysis cathodic process was also put forward.

研究了镍电解阴极过程中硼酸、胶、润湿剂的影响与作用，提出镍电解阴极过程中添加剂在线监控的新方法。

The influence and effect of boracic acid, glue and wetting agent during nickel electrolysis cathodic process were studied and the method of on-line control in nickel electrolysis cathodic process was also put forward.

摘 要：研究了镍电解阴极过程中硼酸、胶、润湿剂的影响与作用，提出镍电解阴极过程中添加剂在线监控的新方法。

It showed that the inverse circular function equation had the best fitting to the process of yellow soil releasing cadmium at conditions with different acid rain. Besides, polynomial equations and two-constant equations can also describe this process properly.

结果表明，反三角函数方程对多种酸雨条件下黄壤吸附态镉释放过程的拟合度最佳，此外多项式方程、双常数方程也能较好地描述这一过程。

The conventional process for the synthesis of rubber antioxidant 4020 from the 4-anino diphenylamine and methyl isobutyl ketone under high pressure can be replaced by a new three-step process using p -aminophenol, methyl-isobutyl ketone, formic acid and aniline as raw materials.

以橡胶防老剂4020合成新工艺小试条件为依据，完成了放大试验过程的工艺研究，改变了传统的在高压下以较大分子为原料合成橡胶防老剂4020的工艺路线。

For decades, chromic acid and sulfuric acid were employed in chromium electroplating. The bath composition was simple and the process was easy to operate.

多年以来，镀铬主要使用铬酸和硫酸镀液，其成份简单，操作容易，无论镀装饰铬还是镀功能性铬，都能得到满意的效果。

Swiss Dianas Development Center is the first in the world to introduce biochemical Botox-alike non-injection botulinus, which is composed of narrow spectrum amino acid link and peptide to form the nanometer active ingredient of amino acid that can quickly penetrate into the skin to change skin structure completely, to smooth away wrinkles, to promote cell energy and tissue recovery as well as to postpone the process of ageing.

Dianas研发中心首家全球性引进生化科技Botox－alike类肉毒杆菌不必打针。由专一性氨基酸键结合六胜肽所组成纳米级氨基酸活性成份，迅速渗透入皮肤，彻底改变肤质结构，抚平皱纹，增进细胞活力，促进组织复原，延缓老化。

The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.

论文的主要研究工作为：运用化学反应工程理论，结合硝基苯的电还原机理，设计出用于硝基苯直接电还原合成对氨基苯酚实验的板框式电解槽，并利用脉冲响应法测定了该板框式电解槽的停留时间分布数据，研究了流型随流量变化的规律；通过动态循环伏安法研究了硝基苯在不同电极上、不同条件下的循环伏安特性，初步评选出了用于硝基苯电还原的电极材料；结合循环伏安的测定结果，在H型隔膜电解槽中采用三电极体系测定了硝基苯在不同电极上、不同条件下的稳态极化曲线，得到了各主要因素的影响规律及硝基苯在各个电极上电还原的交换电流密度数值；在基础研究结论指导下，采用板框式电解槽，在高温、强酸、贫氧系统中，进行了一系列的电解实验，分别考察了电极材料、电流密度、通电量、硝基苯浓度、硫酸浓度等因素对收率及电流效率的影响，最终选择以蒙乃尔合金电极作为阴极、铅合金为阳极、Dupont Nofion 417阳离子交换膜为隔膜，得到由硝基苯直接电还原制对氨基苯酚的最佳电解工艺条件：反应温度85℃，电流密度500A·m~(-2)，硫酸浓度20％wt。

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