How effective are metal ion chelators?

The effect of metal ion chelating agent also changes according to the different parameters of water quality, and its mechanism of action refers to chelating and precipitating with metal ions, filtering and removal, and the supernatant can be discharged up to the standard. For example, HMC-M1 and HMC-M2, etc., the pH of different wastewater, the amount of addition and the pollution factors, etc., also affect the effect of HMC series, HMC-M2 has a relatively wide range of use, and can be chelated and precipitated with any form of nickel ions in the range of pH=2 14.

There are many kinds of metal ion chelating, such as: HMC-M1, HMC-M2, HMC-M7, etc., the effect of different types of metal ion chelating agents is also different, for example, HMC-M1 is a chelating agent for heavy metals, for a wide range of pollution factors, under the appropriate water quality parameters, it can achieve a very large effect, and HMC-M2 is a chelating agent for nickel ions, which can generate insoluble water precipitation with various nickel ions, with a strong effect and a wide range of pH, Generally, it is better to choose HMC-M2 for nickel-containing wastewater.

The multifunctional dispersion chelator is different from the ordinary water softener in that it does not interact with the metal ions in the dye during dyeing, and the color and light change. It can be used as a reactive dye soaping agent, and the effect is more obvious in lake blue and red colors.

Metal ion chelating agent HMC-M1, can generate water-insoluble precipitate with any form of metal ions, in electroplating, electroless plating, electroforming and other industries, there may be metal ligands in the plating solution, and metal ions to generate stable complex ions, it is difficult to remove, generally choose metal ion chelating agent, the effect is strong HMC-M1 is a good metal ion chelating agent, directly meet the standard of Table 3.

Calcium acetate, calcium chloride, citric acid and its calcium, potassium, sodium salt and triethyl ester diaminetetraacetic acid disodium and disodium calcium salt.

Metal atoms or ions interact with ligands containing two or more coordination atoms to form complexes with a ring-like structure, which are called chelates. This ligand substance that can generate chelates is called chelating agent, also known as complexing agent.

Introduction

The ligand contains two or more coordination atoms and forms a chelating ring with a central atom (or ion) at the same time. Due to the ring-forming effect of chelating agents, chelates are more stable than non-chelating coordination compounds with similar composition and structure.

Chelating agents are mostly organic ligands. So far, the largest number of chelating agents found is up to 14 teeth. The coordination atoms in chelating agents are oxygen and nitrogen as the most common, followed by sulfur, phosphorus, arsenic, etc.

The word "chela" is used to describe this type of compound because the molecular structure is much like that of a crab, with two large "pincers" holding metal atoms or ions.

Common chelating agents are as follows:

Ethylenediamine (EN), two teeth.

2,2'- Bipyridine, didentinate.

1,10-o-diazaphenanthrene (phen), didentinate.

Oxalate (OX), didentinous.

Ethylenediaminetetraacetic acid (EDTA), six teeth.

Resources.

The chelating agent is a ligand with two or more coordination atoms containing two or more coordination atoms in the metal atom or ion, and the complex is called a chelator. This ligand substance that can generate chelates is called chelating agents and also becomes complexing agents.

Uses of chelating agents:

1. Chelation has a wide range of applications in chemical research and industrial production.

2. In the chemical industry and industrial production process, adding chelating agent to make metal ions generate chelates with completely different properties is the main method to reduce and control the concentration of metal ions.

3. Chelate is widely used in mineral flotation process, hydrometallurgy, extraction and separation of metal elements, catalytic synthesis of substances, softening of water, electroplating process, pharmaceutical industry, dyeing process, etc.

4. Chelate is widely used in the bleaching of chemical, mechanical and deinking pulp of hydrogen peroxide and hypochlorous acid as bleaching agent.

Medical response to chelating agents

1) It can effectively inhibit the catalytic decomposition caused by metal ions to hydrogen peroxide and hypochlorous acid bleach, improve bleaching efficiency, save bleaching liquid, and reduce bleaching costs.

2) It has a strong capture ability and dispersion effect on Fe3+ ions, avoids the reaction of Fe3+ ions with phenolic groups in the pulp to form a dark complex, protects the fiber, improves the whiteness of the pulp, and reduces the yellowing of the pulp.

3) It can effectively prevent the chemical reaction of metal ions such as calcium and magnesium in the pulp bleaching process to form precipitate, so as to prevent the scaling of system equipment and pipelines, and gradually remove the original scaling of the rinsing system.

The above content reference

Chelation and dispersion are two different things entirely.

Chelation in the chemical industry generally refers to the chelating agent to chelate iron, calcium, magnesium and other metal ions in the water, so that the chelates can be soluble in water, which can generally play a role in softening the hardness of water, so as not to form water-insoluble substances with ions in other products, such as calcium carbonate, etc., which will affect the quality of production. For example, it may cause color flowers in dyeing, and cause gray and hard linen in washing. If sodium tripolyphosphate, EDTA, etc.

The dispersant is to make these chelates evenly disperse in the water, will not produce precipitation, generally chelating and dispersing is at the same time, there are products on the market called chelating dispersants, which have both chelation and dispersion.

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The application range and industry of chelating agent are very broad, and the main role is to combine with metal ions (generally including calcium, magnesium, iron, copper, etc.) in solvents (usually water) through the chelating function of the agent itself to form complexes.

Thus reducing the *** of metal ions to solvents.

There are mainly the following types of metal free chelating agents:

1. Inorganic salts.

Chelating agent: sodium hexametaphosphate, sodium tripolyphosphate.

Sodium metasilicate. 2. Organophosphate chelating agents: HEDP, ATMP, EDTMPS, DTPMPA, etc.

3. EDTA and DTPA series products.

Fourth, green phosphorus-free new chelating agent.

With the improvement of environmental protection requirements, phosphorus-free will become the inevitable road of the cleaning agent industry, and the emission index requirements for cleaning waste liquid are getting better and better.

In the face of such a situation, our company has developed a green phosphorus-free and environmentally friendly chelating dispersant.

It solves the problem of phosphorus-containing chelating agent used in conventional cleaning agents, and the molecule can dissociate H+ in water and become a negatively charged anion on the surface.

It is complexed with metal ions such as Ca2+, Mg2+, Bicong Fe2+, Cu2+ and other metal ions in solution to form a stable complex.

The molecules of green phosphorus-free 133709 environmentally friendly chelated 90396 dispersant have strong adsorption after ionization into anions in water, and have strong adsorption capacity, so that the surface of the particles has the same charge, so that the particles repel each other electrostatically, avoid the accumulation caused by particle collision, and make the particles suspended in water in a dispersed state.

It is widely used in washing daily chemicals, metal surface cleaning, photovoltaic cleaning, optical glass cleaning, PCB circuit boards.

Cleaning, auto parts cleaning, plastic cleaning and other cleaning industries will become the mainstream chelating agent at home and abroad in the future.

Product features: 1. Green and phosphorus-free, which can replace conventional phosphine-containing chelating agents.

2. Strong chelation ability, which can replace conventional EDTA series products.

3. Strong dispersion force to prevent deposition.

4. Prevent corrosion and scaling of cleaning equipment and pipelines.

Hello, I have helped you query the results; There are many kinds of complexing agents that can chelate sodium ions in the cavity branch bark, and the common ones include:1EDTA (ethylenediaminetetraacetic acid):

Stable quaternary complexes can be formed, capable of chelating sodium ions. 2.DTPA (Diethylenetriamine pentaacetic acid):

It can also form stable quaternary complexes that are able to chelate sodium ions. 3.NTA (N-ethylenediaminetetraacetic acid):

It can form ternary complexes, which can be used to chelate sodium ions. 4.HEDTA (hydroxyethylethylenediaminetriacetic acid):

Stable quaternary complexes can be formed, capable of chelating sodium ions. These complexing agents are widely used in water treatment, metal cleaning, medicine and other fields in the industry, I hope mine will be helpful to you!

Metal biological oxide film agent, passivating agent, blackening agent, rust remover, cleaning agent... The main thing is to strongly chelate with metal ions to form a dense oxide film on the metal surface.

There are mainly the following categories of metal chelating agents:

1. Inorganic salt chelating agent: sodium hexametaphosphate, sodium tripolyphosphate, sodium metasilicate.

2. Organophosphate chelator: HEDP, ATMP, EDTMPS, DTPMPA and other 3. EDTA and DTPA series products.

Fourth, green phosphorus-free new chelating agent.

With the improvement of environmental protection requirements, phosphorus-free will become the inevitable way of the cleaning agent industry, the emission index requirements for cleaning waste liquid are getting better and better, conventional cleaning agents because of the subsequent emission of phosphorus or ammonia nitrogen, COD emissions and other problems, at present, especially in the future will face restrictions, in the face of such situations, our company developed a green phosphorus-free environmentally friendly chelating dispersant, to solve the problem of phosphorus-containing chelating agent used in conventional cleaning agents, molecules in water can dissociate H+, It becomes a negatively charged anion on the surface and complexes with metal ions such as Ca2+, Mg2+, Fe2+, and Cu2+ in the solution to form a stable complex.

The molecules of green phosphorus-free 133709 environmentally friendly chelated 90396 dispersant have strong adsorption after ionization into anions in water, and have strong adsorption capacity, so that the surface of the particles has the same charge, so that the particles repel each other electrostatically, avoid the accumulation caused by the collision of particles, and suspend the particles in the water in a dispersed state.

It is widely used in cleaning industries such as daily chemical washing, metal surface cleaning, photovoltaic cleaning, optical glass cleaning, PCB circuit board cleaning, auto parts cleaning, plastic cleaning, etc., and will become the mainstream chelating agent at home and abroad in the future.

Product features: 1. Green and phosphorus-free, which can replace conventional phosphine-containing chelating agents.

2. Strong chelation ability, which can replace conventional EDTA series products.

3. Strong dispersion force to prevent deposition.

4. Prevent corrosion and scaling of cleaning equipment and pipelines.