Answer: want first choice, remaking sand, through the magnetic separation, flotation or chemical purification, silica be 95 percent.
答：先要精选，再制砂后，经磁选、浮选或化学提纯后，二氧化硅能达到95%。
Combining chemical purification and adsorption purification, this paper studies their effect on further purification of calcium and magnesium ions.
本文将化学净化与吸附净化相结合，考察其对卤水中钙镁离子的深度净化效果。
As a chemical it's also used in insecticides, water purification, sewage treatment and the production of ammonia.
作为一种化学原料，它也被用于制造杀虫剂、提纯水、净化污水和制氨。
Some products can have "traces" of thiomersal when the chemical is used during the production process as an antibacterial agent, which is later removed during the purification process.
如果在生产过程中使用硫柳汞作为抗菌剂，然后在净化过程中清除该化学品，有些制品就可有微量硫柳汞。
It is an important separation and purification technique, which is widely used in the areas of chemical industry, pharmaceutical and food industry.
溶析结晶是一种重要的分离和提纯技术，广泛应用于化工、医药、食品等领域。
In this paper, the methods of pectin extraction and purification from plant tissues, including chemical and biological methods, are introduced.
本文综述了从植物中提取果胶的各种方法，包括化学提取法和生物提取法。
This paper summarizes the applications of ACF in chemical separation sectors such as organic and inorganic effluent disposal, air purification and drinking water purification.
本文综述了其在化工分离领域如有机和无机废水处理、空气净化、饮用水的净化等方面的应用，介绍了ACF的理论研究进展，认为ACF的市场前景广。
Based on different physical and chemical properties of components in synthetic rod, a new purification process for synthetic diamond by gas phase oxidation method is proposed.
根据人造金刚石合成棒中各组分不同的物理、化学性质，提出了一种采用气相氧化法提纯人造金刚石的新工艺。
Mainly used for the purification of process water and solutions in food and drinks, electronic, pharmaceutical, petroleum and chemical industries.
主要用于食品饮料工业、电子工业、制药工业、石油及化学工业等部门的工艺用水及溶液净化。
The fermentative process of xylitol is an interesting alternative to conventional chemical process, since it does not require initial xylose purification.
发酵工艺生产木糖醇无需木糖的纯化步骤，是取代化学合成法的一条可行工艺路线。
Mainly used for the purification of process water and solutions in food and drinks, electronic, pharmaceutical, chemical industries.
主要用于食品饮料工业、电子工业、制药工业、化学工业等部门的工艺用水及溶液净化。
It is applied widely in the parallel solution_phase synthesis of combinatorial chemical libraries to simplify the purification of their products.
近五年，它们被广泛的用于平行液相法合成组合化学库，简化液相组合化学库的纯化操作。
The methods of purification for naphthenic acid consist of physical method and chemical method.
环烷酸的提纯方法主要有物理方法和化学方法。
The fermentative process of producing xylitol is an better alternative than conventional chemical process, since it does not require initial xylose purification.
发酵工艺生产木糖醇无需木糖的纯化步骤，是取代化学合成法的一条可行工艺路线。
The functional character of dispersed pancreatic acini prepared by the method including chemical digestion, mechanical isolation and centrifugal purification was studied.
作者观察了采用化学消化、机械分离和离心提纯法制备的胰腺腺泡的机能。
The purification technology of Mg-Mn alloy sacrificial anode was studied and electrochemical properties and chemical composition of samples were tested.
通过高电位镁阳极的熔铸及成型工艺中的净化技术研究，对试验样品进行了化学成分和电化学性能测试。
Methods:The isolation and purification were carried out by repeated silica gel column chromatography, and the chemical structures were determined by physicochemical properties and spectral analysis.
方法：采用反复硅胶柱色谱、葡聚糖凝胶色谱等分离纯化，通过理化常数和波谱分析鉴定其化学结构。
The purification of silica sols was accelerated after acidification, and the influence of ammonia on chemical stability of silica particles was eliminated.
对二氧化硅溶胶进行酸处理后再提纯，可以大大加速提纯过程并消除氨水对二氧化硅粒子化学稳定性的影响。
This study investigates the various approaches in chemical synthetic as well as purification and developments of re - Search.
作者论述了蔗糖酯的各种化学合成、分离提纯方法及其研究进展。
Conclusion the air purification device can effectively eliminate the typical chemical and biological pollutants in tunnels, and the field-test showed that the air quality is guaranteed.
结论研制的空气净化装置可对坑道内典型的化学污染物及大肠杆菌代表的微生物进行有效地去除或杀灭，现场试用结果表明可有效保证坑道空气质量。
Application was discussed for de-sulfur purification technology of gas in chemical and energetic industry, situation of category and usage was introduced for the domestic and outland de-sulfur agents.
论述了气体脱硫净化技术在化工和能源工业的应用；介绍了国内外脱硫剂的分类及使用情况。
The practice showed chemical regent did not need to regenerate even long time use. Its using lifetime was longer than ionic exchange resin's. It was ideal solvent purification measure.
实践表明：凝胶色谱即使长期使用也无需用化学试剂再生，使用寿命比离子交换树脂更长，是一种比较理想的溶剂净化手段。
High purity methanol is one of the very important solvents for chemical industry and microelectronic industry. Dehydration is the key process in the purification of industrial methanol.
高纯甲醇是一种大量应用于化学及微电子工业领域中的重要溶剂，脱水是工业甲醇纯化精制过程中的一个关键问题。
The utility model opens a filtering membrane, which is a tubular chemical filtering membrane used for the water purification device.
本实用新型公开了一种过滤膜，是一种用于水净化装置的管状化学过滤膜。
Modification of bacterial cellulose includes bio-modification during fermentation and chemical modification after purification.
细菌纤维素的改性方法包括细菌发酵时的生物改性及纤维素提纯之后的化学改性。
We researched on separation, purification and chemical characteristics of bioactive peptides from symbiosis fermentative konjac flying powder dairy.
对多菌固化发酵剂共生发酵魔芋飞粉发酵乳中的可溶性肽进行了初步的分离、纯化及理化特性的研究。
Linsuanerqingjia, ammonium sulfate purification, packaging materials, chemical products (excluding hazardous chemicals) sales.
磷酸二氢钾、酸铵提纯，包装材料、工产品(含化学危险品)售。
The methods of extraction and purification, test, chemical composition, structure analysis of tea polysaccharide are summarized.
综述了茶多糖的提取纯化方法、纯度及测定方法、化学组成、结构分析方法。
The methods of extraction and purification, test, chemical composition, structure analysis of tea polysaccharide are summarized.
综述了茶多糖的提取纯化方法、纯度及测定方法、化学组成、结构分析方法。
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