EDTA Chelates The chelating force represents the binding strength of the chelating agent and the metal ion, and the chelating value represents the amount of chelating agent that chelates the metal ions.
Some people in the actual formula will encounter the addition of chelating agent, or there will be scaling phenomenon, will worry about chewing force is not enough, EDTA Chelates and metal ions can not be effectively combined, the actual amount of chelating agent is not in place, resulting in scaling phenomenon The
Effective to prevent the occurrence of scaling there are two ways, one is the initial inhibition of the formation of scale, one is effective after the scale removed. These two methods correspond to the role of chelating dispersants and chelating agents, respectively.
Chelate dispersant has a large molecular weight, which can effectively inhibit the small particles of CaCO3, MgCO3 to form large particles of scale, but the metal ion binding force is weak, EDTA Chelates such products are mainly phosphoric acid esters, PAA, codypropylene copolymer; chelate The role of the mixture and metal ions are strongly combined together, can effectively remove the deposition on the surface of the substrate scale, like our common EDTA, DTPA, HEDTA and so on.
So simply, the chelating agent is a descaling agent, EDTA Chelates chelating dispersant is a scale inhibitor, if the two with the use, will complement each other.
For a cleaning material, the decision to clean the effect is mainly four aspects: 1, temperature; 2, mechanical force; 2, surfactant; 4, chelating agent, the first two need not repeat, we all have deep experience , For the surfactant, we all know that its role is to emulsify the oil material, EDTA Chelates so that dissolved in water, so as to achieve cleaning effect.
However, if there is a metal ion in the oily substance, it is a metal bond to the surface of the substrate, and the surfactant can not break the bond well. EDTA Chelates Therefore, in the conventional method, we increase the amount of surfactant and increase the temperature and mechanical force To achieve the cleaning effect, but the chelating agent can be a good combination of these metal ions, so that it stripped out from the oil, so that you can reduce the amount of surfactant in the premise of low energy consumption.
Chelating agents are widely used, including detergents, EDTA Chelates agricultural nutrient elements, industrial cleaners, paper and photographic industries. Chelating trace elements in agricultural applications can be tissue-modified and minimize nutrient deficiencies, EDTA Chelates thereby increasing yield and effectiveness. The well-known standard EDTA is a complex that maintains the iron and other trace elements in the solution and is therefore often used in agronomic conditions where it is possible to significantly reduce crop yields due to iron and other trace elements.
However, the long-term use of EDTA products is increasingly worthy of attention. Traditional chelating agents such as EDTA or DTPA are difficult to be biodegradable and are generally accumulated in the environment and have been detected in rivers and lakes, soil and water treatment processes. EDTA Chelates This is why the new biodegradable chelator IDHA has recently been developed.
Compared with the conventional chelating dispersant, the green chelating dispersant iminodisuccinic acid has a good effect in chelating calcium ions and copper ions. The synthesis of iminodisuccinic acid in cotton / linen fabric bleaching process, can effectively chelate metal ions, improve the fabric of the hair effect and strength ①.