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Preparation and application of iron oxide-doped nanometer manganese dioxide catalyst

A technology of iron oxide nanometers and manganese dioxide, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, and can solve the problem of small surface area and low catalytic efficiency of manganese dioxide and other problems, to achieve the effect of high activity, easy industrial scale-up, and simple process

Inactive Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic efficiency of commonly used manganese dioxide is low, mainly due to the small surface area involved in the catalytic reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh manganese sulfate, ammonium persulfate, and ferric sulfate into the aqueous solution at a molar ratio of 1:2:1, stir thoroughly to obtain the catalyst precursor solution; place the solution in an aging kettle with a polytetrafluoroethylene lining, Heated in a roller heating furnace at 150°C for a hydrothermal reaction for 20 hours. After cooling, it is filtered, washed with water, washed with alcohol, and dried under vacuum at 50°C to obtain black powder, which is the A catalyst.

[0016] Weigh 200g of a polyacrylamide (molecular weight 12 million) solution with a concentration of 120mg / L into a three-necked flask, weigh 2g of A catalyst, and degrade it at room temperature for 3 hours. The measured polyacrylamide degradation rate is 85.52%.

Embodiment 2

[0021] Weigh manganese sulfate, ammonium persulfate, and ferric nitrate into the aqueous solution at a molar ratio of 1:1.5:0.8, stir thoroughly to obtain a catalyst precursor solution; place the solution in an aging kettle with a polytetrafluoroethylene lining, Heated in a roller heating furnace at 120°C for hydrothermal reaction for 32 hours, filtered, washed with water, alcohol washed, and vacuum dried at 55°C to obtain black powder, which is the C catalyst.

[0022] Weigh 200g of a polyacrylamide (molecular weight 12 million) solution with a concentration of 120mg / L into a three-necked flask, weigh 1.5g of C catalyst, and degrade it at room temperature for 2 hours. The measured polyacrylamide degradation rate is 88.52%.

Embodiment 3

[0024] Weigh manganese sulfate, ammonium persulfate, and ferric sulfate into the aqueous solution at a molar ratio of 1:1.5:0.8, stir thoroughly to obtain a catalyst precursor solution; place the solution in an aging kettle with a polytetrafluoroethylene lining, Heated in a roller heating furnace at 120°C for a hydrothermal reaction for 28 hours. After cooling, it is filtered, washed with water, alcohol washed, and dried under vacuum at 50°C to obtain black powder, which is the D catalyst.

[0025] Weigh 200 g of a polyacrylamide (molecular weight 12 million) solution with a concentration of 120 mg / L and add it to a three-necked flask. Weigh 1 g of D catalyst and degrade it at room temperature for 4 hours. The measured polyacrylamide degradation rate is 90.9%.

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PUM

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Abstract

The invention relates to an iron oxide-doped nanometer manganese dioxide catalyst and application of. A preparation method for the catalyst comprises the following steps: fully dissolving manganese sulfate, ammonium persulfate and ferric salt so as to obtain a solution of a catalyst precursor; and placing the solution in an aging kettle with a polytetrafluoroethylene liner, carrying out heating to 100 to 180 DEG C in a roller heating furnace for a hydrothermal reaction for 10 to 28 h, and then successively carrying out cooling, filtering, washing, alcohol washing and vacuum drying at 40 to 60 DEG C so as to obtain black powder, i.e., the iron oxide-doped nanometer manganese dioxide catalyst. The nanometer manganese dioxide catalyst has good oxydative degradation performance, is applicable to degradation of polyacrylamide in polymer-containing sewage in an oil field and enables polyacrylamide to be rapidly degraded at normal temperature.

Description

Technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a doped iron oxide nano-manganese dioxide catalyst and its application, and is suitable for the degradation of polyacrylamide in oilfield polycontained sewage. Background technique [0002] With the continuous deepening of oilfield development and the application of tertiary oil recovery technology, the production of crude oil also produces a large amount of polymer flooding wastewater. Polymer-containing sewage is an aqueous solution of polyacrylamide with higher molecular weight. Due to its own viscosity and adsorption, it increases the content of oil and suspended matter carried in the water. At the same time, the presence of polyacrylamide greatly increases the sewage The stability of the system makes oil-water separation more difficult. Due to the complex composition of polymer-containing sewage, high viscosity, high degree of emulsification, and difficult biodegradability, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C02F9/04C02F101/38C02F103/10
Inventor 黄冬袁俊秀
Owner CHINA PETROLEUM & CHEM CORP
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