查询词典 chloroacetic acid

On the basis of summarizing separation method of acetic acid-water system, we studied the azeotropic distillation process of acetic acid-water system, selecting butyl acetate, isobutyl acetate and isopropyl acetate as entrainers. The influence of packing height, ratio of water to entrainer and acetic acid initial concentration to separation effect of azeotropic distillation was studied in detail. Simulation calculations of general distillation and azeotropic distillation were carried out. The influence of reflux ratio, theoretical plate, feed position, feed temperature and feed concentration to distillation process were discussed. Preferred process operation parameter, which had guiding meaning to practical production of distillation process were obtained. Basic data for the process amplifying design of azeotropic distillation tower were provided. Invest and operation energy consumption of two distillation methods were compared. The elementary technical design of azeotropic distillation tower was carried out on the basis of result of simulation calculation. The type of major auxiliary equipments and inner parts of packed tower were selected.The research results are as follows:(1) Butyl acetate, isobutyl acetate and isopropyl acetate could be selected as entrainer, and separation effect was near.

本文在综述醋酸-水体系分离方法的基础上，以醋酸丁酯、醋酸异丁酯、醋酸异丙酯为挟带剂，对醋酸水溶液进行共沸精馏过程研究，详细研究了填料高度、水与挟带剂的配比、醋酸初始浓度等对共沸精馏分离效果的影响；对醋酸-水体系进行普通精馏和共沸精馏过程模拟计算，讨论了回流比、理论板、进料位置、进料温度和浓度对精馏过程的影响，获得了对醋酸-水体系精馏过程实际生产具有指导意义的较佳的工艺操作参数、共沸精馏塔的工艺设计放大的基础数据，并对两种精馏方法的投资、操作能耗进行了比较；同时在共沸精馏模拟计算的基础上进行了共沸精馏塔的初步工艺设计计算，并对填料塔的主要辅助设备及塔内件进行了初步选型。

The assistants such as carboxylic, vitamin, microelements, are either the additives of food (such as acetic acid, citric acid, benzoic acid), or the nutrition fortifiers.

其他辅助原料羧酸、维生素、微量元素，或是食品添加成分（如醋酸、柠檬酸、苯甲酸），或是营养强化剂。

This research proved that it was possible to make the medium acid apple juice concentrate be high acid by adding the separated fruit acid.

试验证明将被分离的果酸回兑到中等酸度的浓缩苹果汁中，使其达到高酸浓缩苹果汁的技术要求是完全可行的。

After LA is absorbed, the body converts it into gamma linolenic acid, arachidonic acid, and conjugated linoleic acid.

LA被吸收以后，身体将之转化为gamma linolenic acid， arachidonic acid，和 conjugated linoleic acid。

Choice depends on two points: First, the three fatty acids --- saturated fatty acids, mono-unsaturated fatty acids, polyunsaturated fatty acid ratio is appropriate; second is to look at --- the body of essential fatty acids linolenic acid (gamma microphone Europe -3) and linoleic acid (-6 Galerkin microphone Europe), the ratio is appropriate.

选择食用油关键要看两点：一是三大脂肪酸———饱和脂肪酸、单不饱和脂肪酸、多不饱和脂肪酸的比例是否适宜；二是看人体必需脂肪酸———亚麻酸(欧咪伽—3)和亚油酸(欧咪伽—6)的比例是否适宜。

Experiments show that DTPA, tartaric acid, citric acid, and glycollic acid are possible for stripping Pu〓 from the organic phase containing high concentration UO〓.

结果表明中试厂PUREX流程和TRPO流程的直接衔接是最为成熟和可行的一体化流程，其难点在于锆的处理。

The Ground cherry fruit seed includes the oleic acid, the linoleic acid unsaturated fatty acid.

项目简介：毛酸浆果属茄科酸浆属，是一种无污染营养丰富的天然果品，含18种氨基酸，21种微量元素和矿物质，8种维生素，菇娘果籽含有油酸，亚油酸的不饱和脂肪酸。

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。

The separation behavior of o hydroxybenzoic acid, m hydroxybenzoic acid and p hydroxybenzoic acid in high performance capillary zone electrophoresis was investigated using cetyltrimethylammonium bromide as reversed reagent for electroosmotic flow The effects of pH of buffer solution and volume fraction of methanol on the separation, peak shape and elution order were studie

采用十六烷基三甲基溴化铵为电渗流改性剂，考察了邻羟基苯甲酸、间羟基苯甲酸和对羟基苯甲酸在高效毛细管区带电泳模式下的分离行为，研究了缓冲液的pH和添加剂甲醇的用量对这 3种同分异构体的分离、峰形和出峰顺序的影响，并据此优化了这 3种异构体的分离条件。

Moreover, MeJA induced defense genes, such as pathogenesis-related proteins (PR2a), phenylalanine ammonia-lyase, BX9, and TPS. MeJA also increased DIMBOA and Vannillic acid content of leaves and roots significantly but leaf p－Hydroxybenzoic acid concentration was decreased significantly and Protocatechuric acid was produced in roots only.

1MeJA叶片处理能诱导叶片和根系中丙二烯氧化物环化酶基因、糖基转移酶（BX9）基因、苯丙氨酸转氨酶基因的表达，使叶片和根系中丁布含量升高，同时，6μL/L MeJA处理使第二叶中原儿茶酸含量显著降低，诱导根中产生原儿茶酸，使第二叶中香草酸含量和根中未知物质峰面积显著增大。

It also analyzes the feature and development of semi-finish grinding and finish grinding by roller press.

同时进行了辊压机半终粉磨和终粉磨系统的特点和发展分析。

When I got there, water was dripping slowly from the ceiling and forming a pool on the floor.

当我到那里的时候，水是慢慢地从天花板滴而且形成在地板上的一个池。