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Method for producing BaCO3 through cyclically recovering and reusing (NH4)2CO3

A technology of recycling and absorbing liquid, applied in the direction of ammonium carbonate/acid carbonate, calcium carbonate/strontium/barium, etc., can solve the problem of high energy consumption, difficulty in washing chloride ions, and difficulty in handling high-impurity mother liquor, etc. problem, to achieve the effect of simple washing and low energy consumption

Active Publication Date: 2010-07-14
GUIZHOU REDSTAR DEVING
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High-purity barium carbonate is the main crystal phase material of electronic sensitive ceramics. At present, there are two main process routes of barium chloride and barium nitrate. The barium chloride route is difficult to wash chloride ions and consumes a lot of energy; Crystallization and separation to reduce Ca, Mg, Sr impurities, difficult to deal with high impurity mother liquor
[0003] CN1425613 discloses a kind of utilization manganese dioxide (MnO 2 ) and barium sulfide (BaS) as raw materials to prepare barium hydroxide (Ba(OH) 2 ) and manganese sulfate (MnSO4), the main chemical reaction involved in this preparation method is that barium sulfide reacts with manganese dioxide to generate manganous oxide and barium polysulfide, and barium polysulfide is treated as waste liquid, and no complete Economic benefits of using

Method used

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  • Method for producing BaCO3 through cyclically recovering and reusing (NH4)2CO3
  • Method for producing BaCO3 through cyclically recovering and reusing (NH4)2CO3

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Will [Ba 2+ ] 3000ml of 0.85mol / L barium nitrate solution is placed in a 5000ml beaker, heated to boil, stop heating, add 3.0mol / L (NH 4 ) 2 CO 3 900ml, the adding speed is controlled at about 1.5L / hour.

[0018] Suction filter and separate the above synthetic materials, rinse with a small amount of hot deionized water, combine the filtrate into the recovery system, heat wash the filter cake at 100°C for 1 hour at a material-to-water ratio of 1:5, separate by suction filtration, and place it in an oven at 180°C for drying Dry for 16 hours to obtain BaCO 3 sample 1 # .

Embodiment 2

[0020] Will [Ba 2+ ] 3000ml of 0.83mol / L barium nitrate solution is placed in a 5000ml beaker, heated to boil, stop heating, add 2.15mol / L (NH 4 ) 2 CO 3 1220ml, control the adding speed at about 2.0L / hour.

[0021] The above-mentioned synthetic materials are separated by suction filtration, rinsed with a small amount of hot deionized water, and the combined filtrate enters the recovery system. The filter cake is heated at 100°C for 1 hour at a material-to-water ratio of 1:5, then separated by suction filtration, and dried in an oven at 180°C. Dry for 16 hours to obtain BaCO 3 sample 2 # .

Embodiment 3

[0023] Will [Ba 2+ ] 3000ml of 0.40mol / L barium nitrate solution is placed in a 5000ml beaker, heated to boil, stop heating, add 2.0mol / L (NH 4 ) 2 CO 3 630ml, control the adding speed at about 2.0L / hour.

[0024] The above-mentioned synthetic materials are separated by suction filtration, rinsed with a small amount of hot deionized water, and the combined filtrate enters the recovery system. The filter cake is heated at 100°C for 1 hour at a material-to-water ratio of 1:5, then separated by suction filtration, and dried in an oven at 180°C. Dry for 16 hours to obtain BaCO 3 sample 3 # .

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Abstract

The invention relates to a method for producing BaCO3 through cyclically recovering and reusing (NH4)2CO3, which comprises the following steps: rising the temperature for boiling 0.4 to 0.85 mol / L Ba(NH3)2 solution; stopping heating; adding 2 to 3.5 mol / L (NH4)2CO3 under the agitation for reaction; carrying out solid and liquid separation; carrying out hot washing on obtained filter cake by deionized water; then, carrying out solid and liquid separation; obtaining BaCO3 products after baking the solid; evaporating and concentrating the obtained mother liquid to 400 to 500 g / L; then, carrying out heating reaction for the mother liquid and the BaCO3 in a sealed container; controlling the reaction temperature in a range between 70 and 118 DEG C; introducing NH3 and CO2 released in the reaction in the step C into an absorption device to be absorbed; detecting the concentration of CO3<2-> and NH<4+> in absorption liquid; and supplementing a proper amount of lime-kiln gas for synthesizing (NH4)2CO3. The invention can cyclically utilize the NH4CO3 for preparing BaCO3 products with low strontium content and low calcium magnesium content.

Description

technical field [0001] The present invention relates to the preparation of BaCO 3 methods, especially recycling (NH 4 ) 2 CO 3 Production of BaCO 3 Methods. Background technique [0002] High-purity barium carbonate is the main crystal phase material of electronic sensitive ceramics. At present, there are two main process routes of barium chloride and barium nitrate. The barium chloride route is difficult to wash chloride ions and consumes a lot of energy; Crystallization and separation to reduce Ca, Mg, Sr impurities, high impurity mother liquor treatment is difficult. [0003] CN1425613 discloses a kind of utilization manganese dioxide (MnO 2 ) and barium sulfide (BaS) as raw materials to prepare barium hydroxide (Ba(OH) 2 ) and manganese sulfate (MnSO4), the main chemical reaction involved in this preparation method is that barium sulfide reacts with manganese dioxide to generate manganous oxide and barium polysulfide, and barium polysulfide is treated as waste liq...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01C1/26
Inventor 姜志光华东
Owner GUIZHOU REDSTAR DEVING
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