Novel method for preparing polysilicate flocculant
A technology of polysilicate and flocculant, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low practical value, shortened storage period, and failure of flocculant, and achieves good application prospects, simple synthesis method, Good flocculation effect
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[0013] Example 1
[0014] Add 5.06 grams of ZnSO to a 200ml beaker 4 ·7H 2 O, add 60ml of water, stir to dissolve. According to the ratio of zinc to silicon being 1, the required mass of sodium silicate is calculated to be 5.00 grams. Add 5.00 g of sodium silicate to another 200 ml beaker and stir to dissolve with 35 ml of water. Then, the sodium silicate solution was added dropwise to the zinc sulfate solution under stirring conditions to form a white precipitate of zinc silicate. After the reaction is completed, add 5-6 ml of a 6 mol / L sulfuric acid solution, adjust the pH to 2, and continue to stir the solution for activation. The activation time is 1 hour. The reaction solution obtained at this time is a polyzinc silicate flocculant with a silica content of 1% (mass percentage) and Zn / Si=1 (molar ratio), and the solution is a clear solution.
Example Embodiment
[0015] Example 2
[0016] Add 10.12g ZnSO to a 200ml beaker 4 ·7H 2 O, add 60ml of water, stir to dissolve. According to the zinc to silicon ratio of 1, the required mass of sodium silicate is calculated to be 10.00 grams. Add 10.00 g of sodium silicate to another 200 ml beaker and stir to dissolve with 25 ml of water. Then, the sodium silicate solution was added dropwise to the zinc sulfate solution under stirring conditions to form a white precipitate of zinc silicate. After the reaction is completed, add 12-13 ml of a 6 mol / L sulfuric acid solution, adjust the pH to 2, continue to stir the solution for activation, and the activation time is 1 hour. The reaction liquid obtained at this time is a polyzinc silicate flocculant with a silica content of 2% (mass percentage) and Zn / Si=1 (molar ratio). The solution is light milky white. After standing for a period of time, there is A small amount of white precipitate.
Example Embodiment
[0017] Example 3
[0018] Add 40.48g ZnSO to a 200ml beaker 4 ·7H 2 O, add 50ml of water, stir to dissolve. According to the zinc to silicon ratio of 2, the required mass of sodium silicate is calculated to be 20.00 grams. Add 20.00 g of sodium silicate to another 200 ml beaker and stir to dissolve with 50 ml of water. Then, the sodium silicate solution was added dropwise to the zinc sulfate solution under stirring conditions to form a white precipitate of zinc silicate. After the reaction is completed, add 25 ml of 6 mol / L sulfuric acid solution, adjust the pH to 2, and continue to stir the solution for activation, and the activation time is 2 hours. The reaction solution obtained at this time is a polyzinc silicate flocculant with a silica content of 3% (mass percentage) and Zn / Si=2 (molar ratio). The solution is milky white. After standing for a period of time, there is a certain amount at the bottom of the container. The white precipitate.
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