阴阳离子交换树脂 漂莱特001x7阳离子交换树脂 阴离子交换树脂

 
阴阳离子交换树脂 漂莱特001x7阳离子交换树脂 阴离子交换树脂
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离子交换树脂简介

离子交换树脂是一类具有离子交换功能的高分子材料。在溶液中它能将本身的离子与溶液中的同号离子进行交换。按交换基团性质的不同,离子交换树脂可分为阳离子交换树脂和阴离子交换树脂两类。常用的离子交换设备装填的树脂大都是201x7强碱性苯乙烯系阴离子交换树脂及001x7强酸性苯乙烯系阳离子交换树脂。如果在水质要求特别高的场合则使用抛光树脂。一般情况下,常规的钠离子交换树脂带有大量的钠离子。当水中的钙镁离子含量高时,离子交换树脂可以释放出钠离子,功能基团与钙镁离子结合,这样水中的钙镁离子含量降低,水的硬度下降。硬水就变为软水,这是软化水设备的工作过程。

离子交换树脂参考指标

1、PH范围:1-14
2、较高使用温度:氢氧型≤40℃ 氯型≤80℃
3、转型膨胀率:(Cl→OH)18-22%
4、工业用树脂层高度:1.5m以上
5、再生液浓度:NaOH:3-5%
6、再生液用量:体积:树脂体积=3-5:1
7、再生液流速: 4-6 m/h
8、再生接触时间:45-60 min
9、正洗流速: 15-25 m/h
10、正洗时间: 30 min
11、运行流速: 15-25 m/h
12、工作交换容量:≥400mol/m3

离子交换树脂用途

1、水处理:水处理领域离子交换树脂的需求量很大,约占离子交换树脂产量的90%,用于水中的各种阴阳离子的去除。目前,离子交换树脂的较大消耗量是用在火力发电厂的纯水处理上,其次是原子能、半导体、电子工业等。

2、食品工业:离子交换树脂可用于制糖、味精、酒的精制、生物制品等工业装置上。例如:高果糖浆的制造是由玉米中萃出淀粉后,再经水解反应,产生葡萄糖与果糖,而后经离子交换处理,可以生成高果糖浆。离子交换树脂在食品工业中的消耗量仅次于水处理。

3、制药行业:制药工业离子交换树脂对发展新一代的抗菌素及对原有抗菌素的质量改良具有重要作用。链霉素的开发成功即是突出的例子。近年还在中药提成等方面有所研究。

4、合成化学和石油化学工业:在有机合成中常用酸和碱作催化剂进行酯化、水解、酯交换、水合等反应。用离子交换树脂代替无机酸、碱,同样可进行上述反应,且优点更多。如树脂可反复使用,产品容易分离,反应器不会被腐蚀,不污染环境,反应容易控制等。甲基叔丁基醚(MTBE)的制备,就是用大孔型离子交换树脂作催化剂,由异丁烯与甲醇反应而成,代替了原有的可对环境造成严重污染的四乙基铅。

5、环境保护:离子交换树脂已应用在许多非常受关注的环境保护问题上。目前,许多水溶液或非水溶液中含有有毒离子或非离子物质,这些可用树脂进行回收使用。如去除电镀废液中的金属离子,回收电影制片废液里的有用物质等。

6、湿法冶金及其它:离子交换树脂可以从贫铀矿里分离、浓缩、提纯铀及提取稀土元素和贵金属。

离子交换树脂预处理

1、阳离子交换树脂的预处理


首先,使用饱和食盐水,取其量约等于被处理树脂体积的两倍,将树脂置于食盐溶液中浸泡18-20小时,然后放尽食盐水,用清水漂洗净,使排出水不带黄色;


其次,再用2%-4%NaOH溶液,其量与上相同,在其中浸泡2-4小时(或小流量清洗),放尽碱液后,冲洗树脂直至排出水接近中性为止;


较后,用5%HCL溶液,其量亦与上述相同,浸泡4-8小时,放尽酸液,用清水漂流至中性待用。

2、阴离子交换树脂的预处理


其预处理方法中的第一步与阳树脂预处理方法中的第一步相同;而后用5%HCL浸泡4-8小时,然后放尽酸液,用水清洗至中性;而后用2%-4% NaOH溶液浸泡4-8小时后,放尽碱液,用清水洗至中性待用。

英文翻译

The ion exchange resin of

Ion exchange resin is a kind of polymer material has the function of ion exchange. In solution, it can exchange its own ions with the same number of ions in the solution. The exchange resin can be divided into two types: cation exchange resin and anion exchange resin according to the nature of the exchange group. Most of the resins used in ion exchange equipment are 201X7 strongly basic styrene based anion exchange resin and 001x7 strongly acidic styrene based cation exchange resin. Polishing resins are used where water requirements are exceptionally high. In general, conventional sodium ion exchange resins contain large amounts of sodium ions. When the content of calcium and magnesium in water is high, the ion exchange resin can release sodium ions, and the functional groups combine with calcium and magnesium ions, so that the content of calcium and magnesium in water decreases, and the hardness of water decreases. Hard water turns into soft water, which is the process of softening water equipment.

Use of ion exchange resin

1, water treatment, water treatment capacity requirements in the field of ion exchange resin, ion exchange resin accounted for about 90% of production, for the removal of various ions in water. At present, the large consumption of ion exchange resin is used in the pure water treatment of thermal power plants, followed by atomic energy, semiconductor, electronic industry, etc..

2, the food industry: the ion exchange resin can be used for sugar, wine, monosodium glutamate refining, biological products and other industrial equipment. For example, the manufacture of high fructose syrup is the extraction of starch from corn, and then through hydrolysis reaction to produce glucose and fructose, and then by ion exchange treatment, can produce high fructose syrup. The consumption of ion exchange resin in food industry is only after water treatment.

3, pharmaceutical industry: pharmaceutical industry plays an important role in ion exchange resin on the development of a new generation of antibiotics and the quality improvement of the existing antibiotics. The successful development of streptomycin is a prominent example. In recent years, it has also been studied in the fields of Chinese medicine royalty and so on.

4, synthesis of chemical and petrochemical industry: used in organic synthesis in acid and alkali as catalyst in esterification, hydrolysis, transesterification, hydration reaction. Using ion exchange resin instead of inorganic acid and base, the same reaction can be carried out, and the advantages are more. Such as resin can be used again and again, the product is easy to separate, the reactor will not be corrosion, no pollution of the environment, the reaction is easy to control.

Methyl tert butyl ether (MTBE) was prepared as the catalyst is by macroporous ion exchange resin, by the reaction of isobutylene and methanol and, instead of the original may cause serious pollution on the environment of tetraethyllead.

5, environmental protection: ion exchange resin has been applied in many very popular environmental protection. At present, many aqueous or nonaqueous solutions contain toxic ions or non-ionic substances which can be recycled for use. Such as removing the metal ions in the electroplating waste liquid and recovering useful substances in the waste liquid of the film production.

6, wet metallurgy and other ion exchange resin can be separated from the poor, uranium concentration, and Ti Chunyou in the extraction of rare earth elements and precious metals.

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