Method for preparing chemical sand solidification agent

Abstract

The invention discloses a preparation method of a chemical sand-fixing agent, which belongs to the technical field of environmental treatment. The present invention uses carboxyl-containing itaconic acid and acrylic acid as monomers to polymerize to obtain a polymer containing multiple carboxyl groups. The carboxyl group in itaconic acid-acrylic acid copolymer is a hydrophilic group, which can make the polymer water-retaining properties, and then use thionyl chloride to react with some carboxyl groups to generate acid chloride groups, and the acid chloride groups react with the amino groups of aminoguanidine to obtain polymers containing amino groups and carboxyl groups, thereby introducing more hydrophilic groups and making polymers It has stronger water retention, and the hydrophilic groups in the polymer can interact with Si‑OH, Ca2+, etc. on the surface of sand particles through physical and chemical interactions such as crosslinking and adsorption to make adjacent loose fine sand particles interact with each other through polymer chains. Linking, and then achieving the effect of sand fixation, the alumina in kaolin can form a gel-like polymer through cross-linking with Si-OH on the surface of sand grains under the action of calcium oxide, and can form a solidified layer on the surface of sand grains, thereby achieving The purpose of sand fixation.

Description

technical field [0001] The invention discloses a preparation method of a chemical sand-fixing agent, and belongs to the technical field of environmental treatment. Background technique [0002] There are three methods of sand fixation, namely mechanical sand fixation, plant sand fixation and chemical sand fixation. Mechanical sand fixation, such as setting up sand barriers, grass squares, etc., is effective, but the investment is large, and it is not suitable for large-scale use; Plant sand fixation: It is mainly to plant shelter forests on the edge or hinterland of the desert or to carry out plant crusting on the sand surface to reduce The wind speed in the desert can prevent sand from rising in the desert, and then achieve the purpose of sand fixation, but it is time-consuming and labor-intensive; chemical sand fixation is the most effective and convenient method among the three. film, and then play the role of sand surface fixation. [0003] At present, the commonly use...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problems of poor water retention and sand-fixing ability of existing sand-fixing agents, a preparation method of chemical sand-fixing agents is provided