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Supported foamy iron catalyst used for removing dichlorobiphenyl through oxidation of supercritical water

A technology of supercritical water oxidation and dichlorobiphenyl, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, oxidized water/sewage treatment, etc., can solve the problem of low catalytic activity and stable catalyst Problems such as poor performance and lack of

Inactive Publication Date: 2017-02-22
北京清水润土环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst commonly used in catalytic supercritical water oxidation technology is MnO 2 , CuO, TiO 2 , CeO 2 、Al 2 o 3 , Pt or a composite catalyst composed of several of them such as Cr 2 o 3 / Al 2 o 3 , CuO / A1 2 o 3 , MnO 2 / CeO 2 However, these catalysts have disadvantages such as poor stability and low catalytic activity, which limit the application and development of catalytic supercritical water oxidation technology in water treatment, so the research and preparation of new catalytic materials need to be further strengthened, especially However, there is still a lack of catalysts for supercritical water oxidation to remove dichlorobiphenyls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] (1) Wash 127g of foam iron particles with a particle size of 4-6mm with 300mL of deionized water, soak in 500mL of acetone for 1h, remove the liquid after filtration to obtain substance M0, and obtain substance M1 after substance M0 is washed with 300mL of deionized water , put the substance M1 into 300mL of hydrochloric acid solution with a molar concentration of 2.5mol / L and soak for 0.5h, remove the liquid after filtering to obtain the substance M2, wash the substance M2 with 300mL of deionized water, and then wash it with 500mL of 95% by mass percent After washing with ethanol, place it in a drying oven at 85°C for 1.5h to obtain substance M3, and add substance M3 to 250mL of AgNO with a molar concentration of 2.92mol / L 3 In the solution, shake in a shaker at a temperature of 65°C for 75 minutes, filter and remove the liquid after cooling to room temperature to obtain substance M4, which is washed with 100mL of ethanol with a concentration of 97% by mass and placed i...

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PUM

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Abstract

The invention discloses a supported foamy iron catalyst used for removing dichlorobiphenyl through oxidation of supercritical water. A substance M is prepared after the foamy iron is cleaned and modified with AgNO3; a substance N is prepared after mixed liquor prepared from polyvinylpyrrolidone, methyl alcohol, rhodium chloride trihydrate, concentrated hydrochloric acid and sodium borohydride is modified with the substance M; a substance O is prepared after mixed liquor prepared from MgCl2, CoCl2, concentrated nitric acid, urea and ammonium fluoride is modified with the substance N; a substance P is prepared after mixed liquor prepared from tetra-n-butyl ester titanate, tetraethyl orthosilicate and acetylacetone is modified with the substance O; a substance Q is prepared after mixed liquor prepared from ZrCl4, MgCl2 and InCl3 is modified with the substance P; a substance, namely, the supported foamy iron catalyst used for removing dichlorobiphenyl through oxidation of supercritical water is prepared after mixed liquor prepared from NiCl2, BiCl3, NaOH, Na2CO3 and MnCl2 is modified with the substance Q.

Description

technical field [0001] The invention belongs to the technical field of supercritical water oxidation for refractory organic wastewater treatment, and in particular relates to a supported foam iron catalyst used for supercritical water oxidation to remove dichlorobiphenyl. Background technique [0002] Supercritical water oxidation is a wastewater treatment technology developed in the 1980s. It mainly uses molecular oxygen or hydrogen peroxide as an oxidant and supercritical water as a solvent to oxidize and decompose organic pollutants. In the oxidation process, due to the good solubility of supercritical water to various organic substances and oxygen, organic substances, oxidants and supercritical water form a homogeneous phase, the reaction will not be hindered by the mass transfer between the phases, and the reaction rate can be greatly increased. The reaction temperature of supercritical water oxidation treatment technology is generally 400-600°C, and the pressure is 30-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/04C02F1/72C02F101/36
CPCC02F1/725B01J23/8986C02F2101/36B01J35/56
Inventor 不公告发明人
Owner 北京清水润土环保科技有限公司