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柠檬酸钠的化工应用!
来源:http://www.jnjrh.com 日期:2019-04-04 发布人:admin
柠檬酸钠具有水溶性好、对水中的Ca2+、Mg2+等金属离子具有优良的螯合能力、能发生生物降解、分散能力及抗再沉积能力强等特点,因此正逐渐成为三聚磷酸钠的替代品,被用来生产无磷洗衣粉,尤其是无磷液体洗涤剂。洗涤剂中加入一定量的柠檬酸钠,能明显增加洗涤剂的去污能力。
  Sodium citrate has good water solubility, excellent chelating ability to Ca2+, Mg2+ ions in water, biodegradability, dispersibility and strong anti-redeposition ability, so it is gradually becoming a substitute for sodium tripolyphosphate and used to produce phosphate-free laundry detergent, especially phosphate-free liquid detergent. Adding a certain amount of sodium citrate to the detergent can obviously increase the decontamination ability of the detergent.
  三聚磷酸钠作为助洗剂在洗涤剂中的大量应用是合成洗涤剂工业的一个重要发现。但是,磷酸盐随着洗涤污水排入江河湖泊,造成水质富营养化,促进了水藻类快速繁殖,水中缺氧,危害水生动物的生存,因而成为环保的一大问题。从20世纪70年代起,欧美等发达国家就已经提出了洗涤剂的限磷问题,并先后对其含量作出了规定。在我国,由于各方面原因,特别是价格因素,过去对上述问题并未引起足够重视。随着洗涤剂工业的快速发展,以及水质的不断恶化,洗涤剂行业也正朝着低磷化、无磷化方向发展。
  Sodium tripolyphosphate is an important discovery in the synthetic detergent industry, which is widely used in detergents as detergent aids. However, with the discharge of washing wastewater into rivers and lakes, phosphate causes eutrophication of water quality, promotes the rapid propagation of algae, water hypoxia, endangers the survival of aquatic animals, and thus becomes a major environmental problem. Since the 1970s, developed countries such as Europe and the United States have put forward the problem of phosphorus limitation of detergent, and have made regulations on its content successively. In China, due to various reasons, especially the price factor, the above problems have not been paid enough attention in the past. With the rapid development of detergent industry and the deterioration of water quality, detergent industry is also developing towards the direction of low phosphating and non-phosphating.
  含柠檬酸钠的液体洗涤剂具有优良的洗涤性能,因此,国内外已经开发出多种专用洗涤剂。含柠檬酸钠的液体洗涤剂还具有其他的优良性能,如有的含柠檬酸钠专用清洗剂对某些金属器具无腐蚀性,因而可专门用于清洗贵重的精密仪器等;有的含柠檬酸钠专用洗涤剂清洗器具后,金属表面光亮如新,而且,清洗后的废液经过处理能再生重复利用,降低了洗涤成本。有报道指出,为了解决蔬菜水果等食物上的农药残留问题,有关专家已研制出含柠檬酸钠的蔬菜水果农药残留专用清洗剂。
氨基磺酸
  The liquid detergent containing sodium citrate has excellent detergent performance, so a variety of special detergents have been developed at home and abroad. The liquid detergent containing sodium citrate also has other excellent properties, such as some special detergents containing sodium citrate are non-corrosive to some metal appliances, so they can be used to clean precious precision instruments, etc. Some special detergents containing sodium citrate can make the metal surface shiny as new, and the waste liquid after cleaning can be recycled and reused after treatment, which reduces the cost. Washing cost. It has been reported that in order to solve the problem of pesticide residues in vegetables and fruits, experts have developed a special cleaning agent for pesticide residues in vegetables and fruits containing sodium citrate.
  柠檬酸钠具有很好的络合性能,因此被广泛应用于电镀工业;在建筑工业上,柠檬酸钠可作为缓凝剂加入混凝土中,以提高水泥制品的抗拉、抗压及抗冻性能;在环境保护方面,柠檬酸钠可用来脱除工业尾气中的硫化物。在陶瓷工业上,柠檬酸钠可作为助磨添加剂。此外,柠檬酸钠在酿造及照相业也有新的用途,从而进一步拓宽了柠檬酸钠的应用领域。
  Sodium citrate is widely used in electroplating industry because of its excellent complexing property. In construction industry, sodium citrate can be used as retarder to add into concrete to improve the tensile, compressive and frost resistance of cement products. In environmental protection, sodium citrate can be used to remove sulfide from industrial tail gas. Sodium citrate can be used as grinding aids in ceramic industry. In addition, sodium citrate has new applications in brewing and photography industry, which further broadens the application field of sodium citrate.
相关标签:氨基磺酸