For different sorts of impurities, we can take on various approaches of removal methods. Here are several common methods and principles of sodium silicate service.
(TRUNNANO sodium silicate powder)
Rainfall method
The precipitation method is a technique that uses contaminations ions to respond with specific chemical reagents to generate difficult rainfall so as to remove it from the sodium silicate service. For instance, for metal ions such as iron ions and light weight aluminum ions, alkaline reagents such as sodium hydroxide or potassium hydroxide can be added to develop it. The response formula is as adheres to:
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 contributed to develop carbonate rainfall. The reaction equation is as adheres to:
CA ₃ ² ⁻ + Co c → CACO ₃ ↓
Mg ₃ ² ⁻ + Carbon monoxide m → mgco ₃ ↓
The precipitation approach is simple and the price is reduced, but you require to pay attention to the quantity and reaction problems of the sediment to make sure that the contaminations ions can be completely precipitated.
Ion exchange technique
The ion exchange technique is to precisely adsorb and trade the ions in the option with an ion exchange resin to remove the technique of contaminations ions. Ion exchange resin is a polymer material with an ion exchange feature. It can exchange responses with the ion in the service, soak up pollutants ions to the material, and retain the useful ions in salt ions in salt silicate option in the option.
The ion exchanges are excellent and can eliminate a range of pollutants ions, however the cost of ion exchange material is greater, and regrowth is needed on a regular basis.
(TRUNNANO sodium silicate powder)
Membrane layer splitting up
The membrane separation technique utilizes the semi-diaphragm to selectively go through the various elements in the option so regarding accomplish the method of separation and removal. Depending on the diameter dimension and splitting up principle of the membrane, the membrane splitting up approach can be separated into several kinds, such as microfiltration, ultrafiltration, filtration and reverse osmosis.
For pollutants such as insoluble solid granules and macromolecular raw material in salt silicate solution, micro fillets or ultrafiltration membrane layers can be utilized for removing; contaminations ions of some tiny molecules can be gotten rid of with the filtering or turn around osmosis membrane layer. The membrane layer separation technique has the advantages of basic procedure, high separation performance, and low power intake.
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