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Since it is produced by the metathesis reaction of sodium or potassium iminodisuccinic acid and metal salts, its compound production process will produce invalid salt components (in the form of sodium or potassium salts of inorganic or organic anions), such as sodium nitrate , Potassium nitrate, etc., these salt content reaches 30%-50%, this production method not only increases the production process, causes the production cost to increase, and these additional salts will cause the product effective content to reduce
The application of this metal chelate salt will add unnecessary salt to the soil, such as sulfate, which can easily cause soil compaction and affect crop growth; chloride ions have a corrosive effect on equipment, and are not suitable for chlorine-avoiding crops; nitrate has strong oxidation Increase the risk of storage and transportation; In addition, these invalid salts will reduce the content of active ingredients in the product, and increase the cost of packaging, transportation, and use by about 15%.
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preparation example Construction
[0028] The preparation method of metal chelate salt comprises the steps:
[0029] Add 0.8-1.2 molar parts of raw material A and 0.8-1.2 molar parts of raw material B into 20-25 molar parts of solvent, then slowly add 1-2 molar parts of raw material C and stir, and heat to 80-110 ℃, heating and reflux reaction under normal pressure for 25-40 hours, and cooling down to room temperature after the reaction, to prepare iminodisuccinic acid chelated metal salt.
[0030]The dissolving solvent is water, and auxiliary agents can be added when raw materials are added to the solvent, and the auxiliary agent types are any one of ammonia water, polysorbates, polyoxyethylene fatty acid esters, salicylic acid, cresol, and fatty acids. The mixture of one or more kinds promotes the dissolution of raw materials in the solvent, and the added amount of the auxiliary agent is 0.5-1.5% in mass fraction in the solvent.
Embodiment 1
[0032] An environment-friendly iminodisuccinic acid chelated metal salt, comprising the product of raw material A, raw material B and raw material C reaction, raw material A is maleic acid, raw material B is L-aspartic acid, raw material C is copper hydroxide.
[0033] The preparation method of metal chelate salt comprises the steps:
[0034] The raw material A of 0.8 molar part, the raw material B of 0.8 molar part are added in the water of 20 molar parts, then add ammoniacal liquor, the add-on of ammoniacal liquor is 0.5% of the mass fraction of water, then slowly add the copper hydroxide of 1 molar part and Stir, heat to 80°C after the raw materials are completely dissolved, heat and reflux under normal pressure for 25 hours, cool down to room temperature after the reaction, and prepare iminodisuccinic acid chelated metal salt.
[0035] The content of iminodisuccinic acid in the chelated metal salt of iminodisuccinic acid is 70%, and the content of copper ions is 15%.
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Abstract
The invention discloses an environment-friendly iminodisuccinic acid chelated metal salt, especially a metal chelated salt, which belongs to the field of green chemical fertilizers, and includes raw materials A, raw materials B and raw materials C. The raw material A is Alkaline hydrolysis can obtain any one or a mixture of butenedioate compounds, raw material B is any one or a mixture of compounds that can obtain aspartate radicals by alkaline hydrolysis, and raw material C is mixed with acid The reaction can generate any single substance or compound of metal cations or a mixture of several. The production process of the invention is simple, one-step synthesis, no need for secondary compounding, high active ingredient content, no nitrate, sulfate, chloride, carbonate and other ineffective ingredients, belongs to the environment-friendly preparation process, and can effectively avoid soil compaction , and reduce packaging, transportation and use costs.
Description
technical field [0001] The invention relates to chemical fertilizers, in particular to a metal chelate salt, which belongs to the field of green chemical fertilizers and is used for supplementing metal trace elements to crops or soil. Background technique [0002] There are about 16 kinds of essential elements required for plant growth and development, among which the major elements are carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, the middle elements are calcium, magnesium, sulfur, and 7 kinds of trace elements are iron, zinc, Manganese, Copper, Boron, Molybdenum, Chlorine. With the development of modern science, the application of chemical fertilizers has made a great contribution to the increase of agricultural production, which has greatly increased the output of agricultural products per unit area. However, the unbalanced fertilization has also led to some crises in modern agriculture, which has a negative impact on environmental resources and human health....
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