Fly ash chelating agent and preparation method thereof
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A chelating agent and fly ash technology, which is applied in the field of fly ash chelating agent and its preparation, can solve the problems of long curing time, weak chelating ability, complicated preparation method, etc., achieve strong ability to chelate heavy metals, improve chelating ability, Easily biodegradable effect
Inactive Publication Date: 2018-05-11
东莞市升佳净水材料有限公司
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Problems solved by technology
In physics, lime or cement is usually solidified, but the solidification time is long, and it is easy to cause secondary pollution; in chemistry, the common substance is EDTA, and in chemistry, EDTA has strong metal chelating properties, but its molecular weight is small, fo...
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Embodiment 1
[0017] Weigh 60kg of deionized water, 10kg of trimercaptotriazine trisodium, 6kg of sodium trithiocarbonate, 5kg of 2,6-diamide pyridine thiol, 1 kg of 1,3-dibenzamide ethanethiol, and 0.4 kg of soluble starch. kg; first add trimercaptotriazine trisodium, sodium trithiocarbonate, 2,6-diamide pyridine ethanethiol, and 1,3-dibenzamide ethanethiol into deionized water, stir for 1 hour, and obtain a mixed liquid; then add soluble starch and stir for 2 hours.
Embodiment 2
[0019] Weigh 70kg of deionized water, 20kg of trimercaptotriazine trisodium, 5kg of sodium trithiocarbonate, 5kg of 2,6-diamide pyridine ethanethiol, 0.8kg of 1,3-dibenzamide ethanethiol, and soluble starch 0.5kg; first add trimercaptotriazine trisodium, sodium trithiocarbonate, 2,6-diamide pyridine thiol, 1,3-dibenzamide ethanethiol into deionized water, stir for 1 hour to obtain Mixed liquid; then add soluble starch and stir for 2 hours.
Embodiment 3
[0021] Weigh 80kg of deionized water, 20kg of trimercaptotriazine trisodium, 8kg of sodium trithiocarbonate, 6kg of 2,6-diamide pyridine ethanethiol, 1.5kg of 1,3-dibenzamide ethanethiol, soluble starch 0.6kg; first add trimercaptotriazine trisodium, sodium trithiocarbonate, 2,6-diamide pyridine thiol, 1,3-dibenzamide ethanethiol into deionized water, stir for 1 hour to obtain Mixed liquid; then add soluble starch and stir for 2 hours.
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Abstract
The invention provides a fly ash chelating agent and a preparation method thereof. The fly ash chelating agent includes, by weight, 10% to 20% of trithione triazine trisodium salt, 3% to 8% of sodiumtrithiocarbonate, 2% to 6% of 2, 6-diamido pyridineethanethiol, 0.5% to 1.5% of 1, 3-bisbenzamido ethanethiol, 0.2% to 0.8% of an additive and 60% to 80% of water. The preparation method of the fly ash chelating agent comprises adding trithione triazine trisodium salt, sodium trithiocarbonate, 2, 6-diamido pyridineethanethiol and 1, 3-bisbenzamido ethanethiol into water, carrying out stirring to obtain a mixed solution, and adding the additive into the mixed solution. The preparation method has simple processes. The fly ash chelating agent is an organic sulfur compound chelating agent, has large molecular weight, a strong flocculating function and a strong heavy metal chelating capacity. The additive is soluble starch, improves the chelating ability of the chelating agent and reduces the toxicity of the macromolecular heavy metal chelating agent. The modified product is easily biodegrade.
Description
technical field [0001] The invention relates to the field of environmental protection fine chemicals, in particular to a fly ash chelating agent and a preparation method thereof. Background technique [0002] At present, the reagents used in the market for heavy metal pollution in fly ash of waste incineration plants mainly include physical and chemical substances. In physics, lime or cement is usually solidified, but the solidification time is long, and it is easy to cause secondary pollution; in chemistry, the common substance is EDTA, and in chemistry, EDTA has strong metal chelating properties, but its molecular weight is small, forming The chelates are easy to flow into the water body under acidic solution leaching, causing secondary pollution. However, the reagents mainly used in the market have the following disadvantages: weak chelating ability, poor thermal stability, and complicated preparation methods. Contents of the invention [0003] The object of the prese...
Claims
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Application Information
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