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A preparation method of Raney nickel-iron catalyst and its application in the decolorization method of dye wastewater

A technology for iron catalyst and dye wastewater, applied in the direction of catalyst activation/preparation, Raney-type catalysts, chemical instruments and methods, etc., can solve the problems of high specific surface area, unstable activity, affecting treatment effect, etc., and achieve simple preparation method, The effect of improving the decolorization treatment rate and good catalytic effect

Active Publication Date: 2021-09-14
广西博测检测技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pores increase the surface area of ​​nickel, which brings excellent catalytic activity to Raney nickel. However, due to its high specific surface area, it also brings high unstable activity, which affects the treatment effect.
At present, there is no relevant report on the preparation method of Raney nickel-iron catalyst with good stability and the decolorization treatment of dye wastewater.

Method used

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  • A preparation method of Raney nickel-iron catalyst and its application in the decolorization method of dye wastewater
  • A preparation method of Raney nickel-iron catalyst and its application in the decolorization method of dye wastewater
  • A preparation method of Raney nickel-iron catalyst and its application in the decolorization method of dye wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the preparation method of Raney nickel-iron catalyst is as follows:

[0023] (1) Slowly add 20ml of NaOH with a concentration of 6mol / L to 2g of Raney nickel-aluminum alloy powder that has been crushed through a 120-mesh sieve. N 2 protection, wash to neutrality after the reaction, and then wash with absolute ethanol for 3 to 5 times to obtain the treated Raney nickel powder;

[0024] (2) add Fe in the Raney nickel powder 1g that step (1) obtains 2+ Concentration is 0.43mmol / L ferrous sulfate solution 20ml, obtains mixed solution;

[0025] (3) Configure 0.8mol / L NaBH 4 25ml of the solution was added dropwise into the above mixture, and the reaction was continued for about 15 minutes under ultrasonic waves to obtain a Raney nickel-iron catalyst.

[0026] The accurate ratio of the prepared Raney nickel-iron catalyst was measured by atomic absorption, and the loading ratio of Fe was 40%. Catalyst X-ray diffraction characterization spectrum as shown in f...

example 2

[0033] Example 2: The preparation method of Raney nickel-iron catalyst is as follows:

[0034] (1) Slowly add 20ml of NaOH with a concentration of 6mol / L to 2g of Raney nickel-aluminum alloy powder that has been crushed through a 120-mesh sieve. N 2 protection, wash to neutrality after the reaction, and then wash with absolute ethanol for 3 to 5 times to obtain the treated Raney nickel powder;

[0035] (2) add Fe in the Raney nickel powder 2g that step (1) obtains 2+ Concentration is 0.43mmol / L ferrous sulfate solution 20ml, obtains mixed solution;

[0036] (3) Configure 0.8mol / L NaBH 4 25ml of the solution was added dropwise into the above mixture, and the reaction was continued for about 15 minutes under ultrasonic waves to obtain a Raney nickel-iron catalyst.

[0037] The accurate proportion of the prepared Raney nickel-iron catalyst was measured by atomic absorption, and the loading ratio of Fe was 20%.

[0038] Under the environment of pH=1.3, add the Raney nickel-ir...

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Abstract

The invention discloses a preparation method of a Raney nickel-iron catalyst and a decolorization method applied to dye wastewater, and belongs to the field of environmental engineering wastewater treatment. The preparation method is as follows: the Raney nickel-aluminum alloy powder is added dropwise to a sodium hydroxide solution with a concentration of 6 mol / L, after ultrasonic treatment, a 353K high temperature reaction is carried out under nitrogen protection, and then Fe is added after washing. 2+ Ferrous sulfate solution with a concentration of 0.43mmol / L, and then add dropwise NaBH with a concentration of 0.8mol / L 4 The solution was subjected to ultrasonic reaction for 15min to obtain a Raney nickel-iron catalyst. In application, adding the catalyst of the present invention to the dye wastewater can reduce the dye to achieve the purpose of decolorization. The catalyst of the invention has good catalytic effect, can effectively improve the decolorization treatment rate of dye wastewater, reduce the time cost of decolorization treatment, and has a simple preparation method and low technical threshold, which is favorable for the popularization and application of the method in actual sewage treatment.

Description

technical field [0001] The invention belongs to the field of environmental engineering wastewater treatment, in particular to a preparation method of a Raney nickel-iron catalyst and a decolorization method applied to dye wastewater. Background technique [0002] As a highly efficient metal catalyst with a porous structure and a large contact surface, Raney nickel is usually used in the fields of oil hydrogenation and compound preparation. The preparation process of Raney nickel is as follows: the nickel-aluminum alloy is treated with high-concentration sodium hydroxide, so that most of the aluminum in the alloy is dissolved by the reaction of sodium hydroxide, leaving holes of different sizes in the original space where the aluminum is located. . These pores increase the surface area of ​​nickel, which brings excellent catalytic activity to Raney nickel. However, its high specific surface area also brings high unstable activity, which affects the treatment effect. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J25/02B01J37/34C02F1/70C02F101/30C02F101/34C02F101/38
CPCB01J25/02B01J37/343C02F1/705C02F2101/308C02F2101/34C02F2101/38
Inventor 王云龙苏丽梅顾克潇韦杏陈德程黄汉能梁春兰覃小红罗维齐陆益
Owner 广西博测检测技术服务有限公司
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