Environment-friendly phosphorus-free chelating agent and preparation method thereof
A chelating agent, an environmentally friendly technology, applied in the field of environmentally friendly phosphorus-free chelating agent and its preparation, can solve the problems of precipitation and affecting the use effect, achieve low solubility, improve the use effect, and improve the effect of environmental protection performance
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Embodiment 1
[0019] An environmentally friendly phosphorus-free chelating agent and a preparation method thereof, the preparation method of the chelating agent is as follows:
[0020] Step 1: Prepare sodium ethylenediamine di-o-phenylacetate, tetrasodium iminodisuccinate, and tetrasodium glutamic acid diacetate. Sodium amine di-o-phenylacetate has a strong anionic charge and is stable in high temperature, high pressure and strong acid-base aqueous solutions. The complex molecular structure contains a variety of valence bonds. It has high solubility in water and is compatible with other ingredients in the formula. , can improve the performance of the chelating agent, tetrasodium iminodisuccinate and tetrasodium glutamic acid diacetate can well integrate iron, calcium and magnesium ions, and at the same time have a stable effect on hydrogen peroxide. Mixture to reduce excessive phosphorus in sewage treatment.
[0021] Step 2: Prepare 0.1mol / L EDTA-2Na solution, add 600-700mL of freshly boil...
Embodiment 2
[0026] An environmentally friendly phosphorus-free chelating agent and a preparation method thereof, the preparation method of the chelating agent is as follows:
[0027] Step 1: Prepare 0.1mol / L EDTA-2Na solution, add 600-700mL of freshly boiled warm water and let it cool to 60-70℃, stir until completely dissolved. After cooling, pour it into a 1000mL volumetric flask, then boil the water and let it cool naturally and combine with EDTA-2Na solution, this solution is 0.1mol / L EDTA-2Na solution, and then prepare 0.1mol / L ferrous sulfate solution in In the beaker, add about 600mL of boiled and naturally cooled water, stir to dissolve completely, and then pour it into a 1000mL volumetric flask. 0.1mol / L EDTA-2Na solution is mixed in equal volume, EDTA-2Na solution and ferrous sulfate solution can prevent a large amount of precipitation during chelation, and then the obtained solution is mixed with step one;
[0028]Step 2: Add a certain amount of maleic anhydride, a catalyst and...
Embodiment 3
[0032] An environmentally friendly phosphorus-free chelating agent and a preparation method thereof, the preparation method of the chelating agent is as follows:
[0033] Step 1: Prepare sodium ethylenediamine di-o-phenylacetate, tetrasodium iminodisuccinate, and tetrasodium glutamic acid diacetate. Sodium amine di-o-phenylacetate has a strong anionic charge and is stable in high temperature, high pressure and strong acid-base aqueous solutions. The complex molecular structure contains a variety of valence bonds. It has high solubility in water and is compatible with other ingredients in the formula. , can improve the performance of the chelating agent, tetrasodium iminodisuccinate and tetrasodium glutamic acid diacetate can well integrate iron, calcium and magnesium ions, and at the same time have a stable effect on hydrogen peroxide. Mixture to reduce excessive phosphorus in sewage treatment.
[0034] Step 2: Prepare 0.1mol / L EDTA-2Na solution, add 600-700mL of freshly boil...
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