For different kinds of impurities, we can embrace different methods of elimination techniques. Below are numerous typical techniques and concepts of sodium silicate option.
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Precipitation technique
The rainfall method is a method that uses impurities ions to react with specific chemical reagents to generate challenging precipitation so as to eliminate it from the salt silicate remedy. For example, for steel ions such as iron ions and light weight aluminum ions, alkaline reagents such as sodium hydroxide or potassium hydroxide can be contributed to create it. The reaction formula is as follows:
Fe ⁻ + 3oh f → Fe (OH) ↓
Al ⁻ + 3oh a → Al (oh) ↓
For calcium and magnesium ions, carbonate reagents such as sodium carbonate or potassium carbonate can be added to form carbonate precipitation. The response equation is as follows:
CA ₃ ² ⁻ + Carbon monoxide c → CACO ₃ ↓
Mg ₃ ² ⁻ + Carbon monoxide m → mgco ₃ ↓
The rainfall method is basic and the price is low, however you need to pay attention to the quantity and response problems of the debris to guarantee that the impurities ions can be entirely precipitated.
Ion exchange approach
The ion exchange method is to uniquely adsorb and trade the ions in the service with an ion exchange material to get rid of the technique of pollutants ions. Ion exchange resin is a polymer material with an ion exchange function. It can exchange reactions with the ion in the solution, absorb impurities ions to the resin, and preserve the beneficial ions in salt ions in salt silicate service in the option.
The ion exchanges are excellent and can remove a selection of contaminations ions, but the price of ion exchange material is higher, and regrowth is required frequently.
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Membrane separation
The membrane layer separation technique utilizes the semi-diaphragm to selectively travel through the different parts in the service so as to achieve the method of separation and elimination. Depending upon the diameter size and splitting up concept of the membrane, the membrane layer splitting up method can be separated right into numerous types, such as microfiltration, ultrafiltration, filtering and turn around osmosis.
For impurities such as insoluble solid granules and macromolecular raw material in sodium silicate option, mini fillets or ultrafiltration membranes can be utilized for eliminating; pollutants ions of some little molecules can be gotten rid of with the purification or reverse osmosis membrane layer. The membrane layer separation technique has the benefits of simple procedure, high separation effectiveness, and reduced energy consumption.
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