Fly ash cured heavy metal chelating agent and preparation process thereof

Abstract

The invention discloses a fly ash cured heavy metal chelating agent and a preparation process thereof and belongs to the field of chemical preparations. The fly ash cured heavy metal chelating agent is prepared from the following raw materials in parts by weight: 20-40 parts of a polycarboxylic acid ammonium salt, 20-30 parts of dimercaptoethylamine hydrochloride, 15-25 parts of amino methane acetate, 10-20 parts of sulfo-acetate, 30-50 parts of water, 5-10 parts of a surfactant, wherein the surfactant is prepared from the following raw materials in parts by weight: 5-30 parts of isopropyl alcohol amine, 10-40 parts of citric acid, 2-6 parts of a cosolvent and 5-20 parts of a dispersant. The chelating agent disclosed by the invention is not only simple to prepare and low in preparation cost, but also high in chelating efficiency, rich in chelating type and high in market application value.

Description

technical field

[0001] The invention belongs to the field of chemical preparations, in particular to a fly ash solidified heavy metal chelating agent and a preparation process thereof. Background technique

[0002] Chelating agent, also known as complexing agent, is an organic or inorganic compound that can chelate with heavy metal ions to form a stable water-soluble complex, thereby deactivating heavy metal ions. Chelating agent molecules contain electron donors that can coordinate and combine with heavy metal ions, and have a series of special functions such as softening, descaling, rust prevention, stabilization, and synergism, so they are widely used in water treatment, textile printing and dyeing, papermaking, etc. technology field. The fly ash of domestic waste incineration has complex components, and the main pollutants are heavy metals with high leaching toxicity, which have serious harm to the environment. After testing, the fly ash of domestic waste incineration ...