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A method for preparing high-efficiency catalyst by electrolyzing manganese slag and catalyzing the oxidation degradation of methylene blue by hydrogen peroxide

A technology of methylene blue and electrolytic manganese slag, which is applied in the direction of heterogeneous catalyst chemical elements, chemical instruments and methods, physical/chemical process catalysts, etc. Problems such as low added value of products, to achieve high practical application value, wide range of wastewater pollution concentration, and low cost

Active Publication Date: 2020-10-27
北京森泉伟业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current methods of direct landfilling and stacking of electrolytic manganese slag are too extensive, resulting in insufficient resource utilization, low production efficiency, serious environmental pollution, and high cost of site occupation, which seriously plague electrolytic manganese production enterprises and local people.
[0004] The patent application whose application number is 200610050960.4 discloses a method for producing ecological cementitious materials by using electrolytic manganese slag. In its technical scheme, the utilization of manganese slag is limited and the process is complicated; The treatment method of electrolytic manganese slag ash and its products, the patent application No. 99115241.7 discloses a method for controlling the total amount of electrolytic manganese slag land treatment with full-price matrix, but there is a shortage of low added value of manganese slag products
The patent application with the application number 200610050961.9 discloses a method for producing cement by using electrolytic manganese slag, which does not fully develop the value of manganese slag; the publication number is CN 101306425 B, which discloses a process for the comprehensive utilization of electrolytic manganese slag. The technology washes with water to elute the soluble substances and recycle them, and the filter residues are used as building materials and other materials; the document with the publication number CN 101579685 B discloses a method for processing and utilizing electrolytic manganese waste residues, which can make it difficult to separate manganese from electrolytic manganese waste residues. Elemental manganese sulfate can be converted into manganese carbonate which can easily separate manganese element; ammonium sulfate which is difficult to separate nitrogen element can be converted into aluminum ammonium sulfate dodecahydrate crystal which can easily separate nitrogen element, but the technical process is complex , high processing cost, not suitable for large-scale industrial processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Catalyst preparation:

[0028] 1) Weigh 1kg of manganese slag from an electrolytic manganese company in Hunan, wherein the manganese content is 10.4wt.%, and the sulfate radical is 1.8wt.%. Soak in 2L mixed solution containing 0.5mol / L sodium hydroxide and 0.5mol / L sodium carbonate and stir for 2 hours, filter with suction, dry at 120°C, pulverize, and pass through a 200-mesh sieve.

[0029] 2) soluble copper salt is dissolved in water and is formulated into the copper-containing solution that molar concentration is 3mol / L; Soluble cerium salt is dissolved in water and is formulated into the cerium-containing solution that molar concentration is 0.1mol / L; Copper-containing solution and cerium-containing solution The solutions are mixed at a volume ratio of 1:1 to obtain a copper-cerium mixed solution.

[0030] 3) Add the above-mentioned copper-cerium mixed solution into the manganese slag powder after drying and sieving in step 1), knead and stir evenly to obtain th...

Embodiment 2

[0034] 1. Catalyst preparation:

[0035] 1) Take 5kg of manganese slag from an electrolytic manganese company in Ningxia, and dry it at 120°C, in which the manganese content is 8.5wt.% (dry basis), the sulfate radical is 4.5wt.%, and the moisture content is 38.8wt.%.

[0036] 2) Prepare sodium carbonate alkali solution for soaking and stirring or rinsing for 2 hours, the concentration of sodium hydroxide in the solution is 0.4mol / L, the concentration of sodium carbonate is 0.8mol / L, filter, dry at 120°C, pulverize, and pass through a 200-mesh sieve to obtain Manganese slag powder.

[0037] 3) soluble copper salt is dissolved in water and is formulated into the copper-containing solution that molar concentration is 1mol / L; Soluble cerium salt is dissolved in water and is formulated into the cerium-containing solution that molar concentration is 0.05mol / L; Copper-containing solution and cerium-containing solution The solutions are mixed at a volume ratio of 1:1 to obtain a copp...

Embodiment 3

[0042] 1. Catalyst preparation

[0043] 1) Take 5kg of manganese slag from an electrolytic manganese company in Ningxia, and dry it at 120°C. According to the mass percentage, the manganese content is 8.5% (dry basis), the sulfate radical is 4.5%, and the moisture content is 38.8%.

[0044] 2) Prepare sodium carbonate alkali solution, wherein, the concentration of sodium hydroxide is 0.4mol / L, and the concentration of sodium carbonate is 0.8mol / L.

[0045] 3) Weigh 2 kg of manganese slag, add 5 L of sodium carbonate alkali solution, stir for 1.5 hours, filter, dry at 120° C., pulverize, and pass through a 200-mesh sieve to obtain manganese slag powder.

[0046] 4) soluble copper salt is dissolved in water and is formulated into the copper-containing solution that molar concentration is 3mol / L; Soluble cerium salt is dissolved in water and is formulated into the cerium-containing solution that molar concentration is 0.1mol / L; Copper-containing solution and cerium-containing sol...

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Abstract

The invention discloses methods for preparing an efficient catalyst from electrolytic manganese residues and oxidizing and degrading methylene blue by catalyzing hydrogen peroxide, and belongs to thetechnical field of recycling of the electrolytic manganese residues. The method comprises the following steps: performing suction filtration, drying and smashing on leached manganese residues to obtain manganese residue powder; uniformly kneading and stirring the manganese residue powder and a copper-cerium mixed solution to obtain a manganese residue mixed solution; calcining the manganese residue mixed solution to obtain the catalyst. When the catalyst disclosed by the invention is applied to treatment of methylene blue wastewater, the removal rate of the methylene blue is up to 99 percent;after the catalyst is settled down, supernate is colorless. The method solves the problem of a large amount of the electrolytic manganese residues; the electrolytic manganese residues are prepared into a modified manganese residue catalyst used for efficiently catalyzing the hydrogen peroxide to degrade the methylene blue, so that the manganese residue resources are reused, and the additional value of the manganese residues is increased; the methods have extremely high actual application values.

Description

technical field [0001] The invention relates to the technical field of resource utilization of electrolytic manganese slag, in particular to a method for preparing a high-efficiency catalyst from electrolytic manganese slag and catalyzing the oxidation degradation of methylene blue by hydrogen peroxide. Background technique [0002] Printing and dyeing wastewater is one of the main sources of water pollution. The wastewater has the characteristics of large water volume, high concentration, complex composition, deep color and refractory degradation. Most of the dye components contained in it also have carcinogenic, teratogenic and mutagenic hazards to the human body. Methylene blue is an important chemically synthesized cationic dye, which is widely used in the printing and dyeing industry. The widespread use of methylene blue has also led to serious pollution of water bodies by wastewater containing methylene blue dyes. In recent years, due to the development of Fenton tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C02F1/72C02F101/30C02F103/30
CPCB01J23/002B01J23/8892B01J2523/00C02F1/722C02F1/725C02F2101/308C02F2103/30B01J2523/17B01J2523/3712B01J2523/72
Inventor 宋乐山张涛贾柏林
Owner 北京森泉伟业科技有限公司
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