Method for preparing caustic soda and calcium chloride with cogeneration of powdery calcium salt by using salting-out master liquid in zinc powder method
A zinc powder method, calcium chloride technology, applied in chemical instruments and methods, alkali metal compounds, calcium/strontium/barium chloride, etc., can solve the problems of low salt recovery, secondary pollution, escape, etc., to achieve Considerable economic benefits, pollution control, and simple equipment
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Embodiment 1
[0025] The method for preparing caustic soda and calcium chloride co-production powder calcium salt with the salting-out mother liquor in the zinc powder method comprises the following preparation steps:
[0026] Step A, put 1000 liters of salting-out mother liquor and calcium hydroxide solution in the zinc powder method into the corrosion-resistant reactor 1 according to the mass ratio of pure substance 1: 0.59 (wherein containing 250Kg of sodium chloride, 40Kg of sodium sulfite, dihydrogen Sodium sulfite 20Kg and sodium sulfate 10Kg, according to the mass ratio of sodium chloride and calcium hydroxide 1: 0.59, the mass ratio of sodium sulfite and calcium hydroxide 1: 0.59, the mass ratio of sodium dithionite and calcium hydroxide 1: 0.95, sulfuric acid The mass ratio of sodium and calcium hydroxide is calculated at 1:0.59, then the calcium chloride required to drop in is 188.8Kg), stirring constantly; the reaction generates sodium hydroxide, calcium chloride, calcium sulfate,...
Embodiment 2
[0032] The method for preparing caustic soda and calcium chloride co-production powder calcium salt with the salting-out mother liquor in the zinc powder method comprises the following preparation steps:
[0033] Step A, put 1000 liters of salting-out mother liquor and calcium hydroxide solution in the zinc powder method into the corrosion-resistant reactor 1 according to the mass ratio of pure substance 1: 1.09 (wherein containing 250Kg of sodium chloride, 40Kg of sodium sulfite, dihydrochloride Sodium sulfite 20Kg and sodium sulfate 10Kg, according to the mass ratio of sodium chloride and calcium hydroxide 1: 1.09, the mass ratio of sodium sulfite and calcium hydroxide 1: 1.09, the mass ratio of sodium dithionite and calcium hydroxide 1: 1.09, sulfuric acid The mass ratio of sodium and calcium hydroxide is calculated at 1: 1.09, then the calcium hydroxide required to drop in is 348.8Kg), stirring constantly; the reaction generates sodium hydroxide, calcium chloride, calcium s...
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