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Preparation method of acid modified caustic calcined magnesite printing and dyeing wastewater treatment agent

A technology for treating chemicals, printing and dyeing wastewater, applied in textile industry wastewater treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as environmental impact, resource waste, white pollution, etc., and achieve simple preparation process, low cost, and product performance. stable effect

Inactive Publication Date: 2014-02-26
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

It causes a great waste of resources and forms white pollution, which seriously affects the local environment

Method used

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  • Preparation method of acid modified caustic calcined magnesite printing and dyeing wastewater treatment agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 300g of lightly burned magnesium powder (75% MgO content) into a 500mL large beaker, slowly add 240mL of industrial hydrochloric acid with a mass fraction of 3%, stir while adding, continue to stir and mix for 10min, after static activation for 20min, heat in a microwave oven Modified and dried, taken out and cooled, and ground into powder, that is the prepared light-burned magnesium printing and dyeing wastewater treatment agent product. This product is used to treat five kinds of dye simulated wastewater commonly used in printing and dyeing factories, and a good treatment effect has been received. The processing results are shown in Table 1.

[0019] Table 1 water treatment agent decolorization effect on various dye wastewater

[0020]

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Abstract

The invention discloses a preparation method of an acid modified caustic calcined magnesite printing and dyeing wastewater treatment agent, relating to a preparation method of a wastewater treatment agent. According to the preparation method, low-grade caustic calcined magnesite is used as a raw material, and the water treatment agent product is prepared by adopting industrial hydrochloric acid through an acidification process. The preparation method is characterized by comprising the following steps: adding industrial 3-7 percent hydrochloric acid to a beaker filled with caustic calcined magnesite according to a mass volume ratio of 1: (0.8-1.2)(g / ml); mixing and stirring for 10-20 minutes at room temperature; standing for reacting for 15 minutes; and drying by microwaves or a drying oven and then crushing to prepare the acid modified caustic calcined magnesite printing and dyeing wastewater treatment agent. According to the preparation method disclosed by the invention, the low-graded caustic calcined magnesite and low-concentration industrial hydrochloric acid are adopted as main raw materials; the preparation process is simple; no wastewater and waste slag are generated; the production cost is low; the preparation method is environment-friendly. The acid modified caustic calcined magnesite printing and dyeing wastewater treatment agent has relatively good application scope and adsorbing and decoloring effects on reactive dyes, acidic dyes and direct dyes.

Description

technical field [0001] The invention relates to a preparation method of a wastewater treatment agent, in particular to a preparation method of an acid-modified light-burned magnesium printing and dyeing wastewater 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 d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/30
Inventor 刘桂萍刘长风宁志高刘永次
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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