Preparation method of acid-modified caustic calcined magnesia/bentonite water treatment chemicals

Abstract

The invention provides a preparation method of acid-modified caustic calcined magnesia/bentonite water treatment chemicals and belongs to water treatment chemical preparation methods. The method comprises the steps that a certain amount of caustic calcined magnesia and a certain amount of bentonite are weighed according to the mass ratio of 1.5-2:1 (g/g); technical hydrochloric acid with the mass fraction of 9% is added into the caustic calcined magnesia and the bentonite according to the mass-to-volume ratio of 1:1.2 (g/mL); the mixture is stirred, mixed and acidized for 30 minutes at the temperature ranging from 45 DEG C to 55 DEG C and then subjected to standing for 30 minutes; after being subjected to microwave irradiation or high-temperature drying, the obtained product is smashed, and then the prepared acid-modified caustic calcined magnesia/bentonite water treatment chemicals are obtained. According to the preparation method, production raw materials comprise low-grade caustic calcined magnesia powder, the calcium bentonite and the low-concentration technical hydrochloric acid; the preparation process is simple, no waste water and waste residues are generated, and the acid-modified caustic calcined magnesia/bentonite water treatment chemicals are low in production cost and friendly to environment, are novel water treatment chemicals integrating the functions of coagulation, adsorption, filtration and the like, have a wide pH application range to reactive dyes, heavy metal and other pollutants and have a good effect on removing the reactive dyes, the heavy metal and other pollutants.

Description

technical field [0001] The invention relates to a preparation method of a water treatment agent, in particular to a preparation method of an acid-modified light-burned magnesium / bentonite water treatment agent. Background technique [0002] Water treatment agents (coagulants) include inorganic coagulants and organic polymer coagulants. Inorganic coagulants are mostly iron salts, aluminum salts, magnesium salts and inorganic polymer coagulants. Due to the complex manufacturing process, serious environmental pollution, high price of some products, certain toxicity, easy to cause secondary pollution and other reasons for the above-mentioned water treatment agents, as well as the existence of many types of industrial wastewater, great changes in water quality, and difficult to handle, etc., Its production and use are subject to certain restrictions and influences. Therefore, the development of water treatment agents is forced to gradually move towards the direction of "polyme...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing acid-modified light-burned magnesite / bentonite water treatment agent. The materials of this method are derived from natural low-grade magnesite and calcium-based bentonite, which have abundant stock and low cost, and solve the problem of low-grade magnesite The comprehensive utilization of ore and bentonite provides a way out for its rational development and utilization, and enriches the varieties of water treatment agents

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