Preparation method of acid-modified light-burned magnesium/bentonite water treatment agent

A technology of bentonite and light-burned magnesium, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of abundant stock, good removal effect and stable product performance

Inactive Publication Date: 2016-04-20
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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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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  • Preparation method of acid-modified light-burned magnesium/bentonite water treatment agent

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Embodiment Construction

[0016] Below in conjunction with embodiment, the present invention is described in further detail.

[0017] Add 200g of lightly burned magnesium powder (65% MgO content) and 100g of calcium-based bentonite into a 500mL large beaker, slowly add 360mL of industrial hydrochloric acid with a mass fraction of 9%, stir while adding, heat to 450C in a water bath, and continue to stir and mix for 30 minutes After static activation for 30 minutes, heat and dry to constant weight, take it out and cool it, and grind it into powder, which is the prepared light-burned magnesium / bentonite water treatment agent product. This product is used to treat five kinds of reactive dyes and mixed dyes simulated wastewater commonly used in printing and dyeing factories, and all of them have received good treatment effects under alkaline conditions. The processing results are shown in Table 1.

[0018] Table 1 water treatment agent decolorization effect on various dye wastewater

[0019]

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Abstract

A method for preparing an acid-modified light-burned magnesia / bentonite water treatment agent, which belongs to the preparation method of a water treatment agent. A certain amount of light-burned magnesia and bentonite are weighed according to a mass ratio of 1.5-2:1 (g / g), And add industrial hydrochloric acid with a mass fraction of 9% to light burnt magnesia and bentonite at a mass volume ratio of 1:1.2 (g / mL), mix and acidify at 450C-550C for 30 minutes, stand still for 30 minutes, and dry with microwave or high temperature Pulverization is the prepared acid-modified light-burned magnesium / bentonite water treatment agent product. The production raw materials are low-grade light-burned magnesium powder, calcium-based bentonite and low-concentration industrial hydrochloric acid; the preparation process is simple, no waste water and waste residue are produced, the production cost is low, and the environment is friendly; it integrates coagulation, adsorption, filtration and other functions. A new type of water treatment agent, which has a good pH adaptation range and removal effect on reactive dyes, heavy metals 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 "polymer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 刘桂萍刘学贵刘长风宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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