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The preparation methods of Sodium Chlorine

  • Author:Kathy
  • Source:www.oceanchinachem.com
  • Release on :2016-05-11

Industrial methods

Introduced by water (containing 2.4% sodium chloride) yantian, after sun drying, concentration crystal, made products. Have water, steam heating, sand filter, with ion exchange membrane electrodialysis method for enrichment, get brine (containing sodium chloride 160 ~ 180 g/L) by bittern gypsum precipitation evaporation, centrifugal separation, more than 95% of sodium chloride (moisture content 2%), then through dry salt can be obtained. Also can use rock salt, salt lake brine as raw material, after sun drying, obtained crude salt. Underground brine and well salt as raw materials, through evaporation and concentration, three-way or four-way precipitation crystallization, centrifugal separation.

                                        

 Laboratory method

Remove salt soluble in water, insoluble impurities, then add to digest preparations such as NaOH, Na2CO3 and CaCl2, SO4, Ca, Mg, Fe and other soluble impurities into precipitation, filtration to remove, pH adjustment to 7, with pure hydrochloric acid finally concentrated solution that is pure sodium chloride crystallization.

In the laboratory preparation method is mix equal amounts of hydrochloric acid and sodium hydroxide, sodium chloride solution. Again the solution distillation, available sodium chloride crystals. The main reaction: HCl + NaOH = = NaCl + H2O.

In addition, the metal sodium in chlorine light also can produce sodium chloride environment, the chemical equation is as follows: 2 na + nacl lit Cl2 = = 2

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