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硫酸钠的制备方法是怎么样的?

发布来源:http://www.jinhao360.com    更新时间:2019-06-28 点击数:

  硫酸钠是硫酸根与钠离子化合生成的盐,属于无机化合物,外形为无色、透明、大的结晶或颗粒性小结晶,主要用于制造水玻璃、玻璃、瓷釉、纸浆、致冷混合剂、洗濯剂、枯燥剂、染料稀释剂、剖析化学试剂、医药品、饲料等,在有机合成实验室硫酸钠是一种为常用的后处置枯燥剂。既然硫酸钠的用处这么广,那它的制备办法是什么呢?下面就给大家分享一下,一同来看看吧!
  Sodium sulfate is a salt formed by the ionization of sulfate radical with sodium, which belongs to inorganic compound. Its shape is colorless, transparent, large crystals or small granular crystals. It is mainly used in the manufacture of sodium silicate, glass, enamel, pulp, refrigerant mixtures, detergents, drying agents, dye diluents, analytical chemicals, pharmaceuticals and feedstuffs. Sodium sulfate is the most commonly used Post-disposal drying agent in organic synthesis laboratory. Since sodium sulfate is so widely used, what is its preparation method? Now Hengyi Chemicals will share it with you, let's take a look at it together.
  1、滩田法
  1. Tantian Method
  应用自然界不同时节温度变化使原料液中的水分蒸发,将粗芒硝结晶出来。夏季将含有氯化钠、硫酸钠、硫酸镁、氯化镁等成分的咸水灌入滩田,经日晒蒸发,冬季析出粗芒硝。此法是从自然资源中提出芒硝的主要办法,工艺简单,能耗低,但作业条件差,产品中易混入泥砂等杂质。
  The crude mirabilite was crystallized by evaporating the water in the raw liquor with the change of temperature at different time in nature. Saline water containing sodium chloride, sodium sulfate, magnesium sulfate and magnesium chloride was irrigated into beach fields in summer, evaporated in the sun, and coarse mirabilite was precipitated in winter. This method is the main way to put forward mirabilite from natural resources. It has simple process, low energy consumption, but poor operating conditions and easy to mix with impurities such as mud and sand in products.
  2、机械冷冻法
  2. Mechanical refrigeration
  应用机械设备将原料液加热蒸发后冷冻至-5~-10℃时析出芒硝。与滩田法比拟,此法不受时节和自然条件的影响。产质量量好,但能耗高。
  The raw material liquid is heated and evaporated by mechanical equipment, and then frozen to - 5 ~10 ~C to precipitate mirabilite. Compared with the beach method, this method is not affected by time and natural conditions. The output and quality are good, but the energy consumption is high.
  3、盐湖综合应用法
  3. Comprehensive application of salt lakes
  主要用于含有多种组分的硫酸盐-碳酸盐型咸水。在提取各种有用组分的同时,将粗芒硝别离出来。例如加工含碳酸钠、硫酸钠、氯化钠、硼化物及钾、溴、锂的盐湖水,可先碳化盐湖卤水,使碳酸钠转化成碳酸氢钠结晶出来;冷却母液至5~15℃,使硼砂结晶出来;别离硼砂后的二次母液冷冻至0~5℃,析出芒硝。
  It is mainly used in sulfate-carbonate saltwater containing various components. The crude mirabilite was separated while extracting various useful components. For example, when processing salt lake water containing sodium carbonate, sodium sulfate, sodium chloride, boride and potassium, bromine and lithium, sodium carbonate can be converted into sodium bicarbonate to crystallize; the mother liquor can be cooled to 5-15 degrees C to crystallize borax; the secondary mother liquor after separation from borax can be frozen to 0-5 degrees C to precipitate mirabilite.
氢氧化钾
  4、其他方法
  4. Other methods
  可由硫酸和氢氧化钠反应制得。H2SO4+ 2NaOH→Na2SO4+ 2H2O。由天然产物萃取也可制得。
  It can be prepared by the reaction of sulfuric acid and sodium hydroxide. H2SO4 + 2NaOH Na2SO4 + 2H2O. It can also be extracted from natural products.
  还可用碳酸氢钠和硫酸反应制备:2NaHCO3+H2SO4→Na2SO4+2H2O+2CO2↑。
  It can also be prepared by reaction of sodium bicarbonate with sulfuric acid: 2NaHCO 3 + H2SO4 Na2SO4 + 2H 2 + 2CO 2.
  在实验室可用氯化钠固体和浓硫酸在加热条件下制取硫酸钠。2NaCl+H2SO4→2HCl↑+Na2SO4
  Sodium sulfate can be prepared in laboratory by using sodium chloride solid and concentrated sulfuric acid under heating conditions. 2NaCl+H2SO4_2HCl_+Na2SO4
  或用氢氧化钠与硫酸铜反应制备:2NaOH+CuSO4=====Na2SO4+Cu(OH)2↓
  Or the reaction of sodium hydroxide with copper sulfate to prepare: 2NaOH+CuSO4=========Na2SO4+Cu(OH)2_
  在家庭中可用碳酸钠或碳酸氢钠与硫酸铜反应制得:
  Sodium carbonate or sodium bicarbonate can be prepared by reacting with copper sulfate in the family.
  2CuSO4+2Na2CO3+H2O=Cu2(OH)2CO3 ↓+ 2Na2SO4 +CO2↑
  2CuSO4+2Na2CO3+H2O=Cu2(OH)2CO3+2Na2SO4+CO2_
  4NaHCO3+2CuSO4=Cu2(OH)2CO3↓+2Na2SO4+3CO2↑+H2O
  4NaHCO3+2CuSO4=Cu2(OH)2CO3+2Na2SO4+3CO2+H2O
  可采用滩田法、机械冷冻法、盐湖综合法。滩田法和机械冷冻法适于加工以Na、Mg、Cl、SO42-为主要成分的海水型盐水及其他各种芒硝矿。因低温下硫酸钠的溶解度急剧变小,根据水盐体系相平衡关系可以从卤水中分离出粗芒硝。
  Beach field method, mechanical freezing method and salt lake comprehensive method can be used. Beach field method and mechanical freezing method are suitable for processing seawater brine with Na, Mg, Cl and SO42 - as main components and other mirabilite ores. Because the solubility of sodium sulfate decreases sharply at low temperature, coarse mirabilite can be separated from brine according to the phase equilibrium relationship of water-salt system.

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