Supported zeolite catalyst for oxidation removal of dichlorobiphenyl in supercritical water

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

Inactive Publication Date: 2017-02-22
北京清水润土环保科技有限公司
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  • 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 ac

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062](1) Wash 142g of zeolite particles with a particle size of 4-6mm with 300mL of deionized water and 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, Substance M1 was soaked in 300 mL of hydrochloric acid solution with a molar concentration of 2.5 mol / L for 0.5 h, and the liquid was removed after filtration to obtain substance M2. Substance M2 was washed with 300 mL of deionized water, and then washed with 500 mL of ethanol with a mass percentage concentration of 95%. After washing, 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 2.49mol / 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 9...

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Abstract

The invention discloses a supported zeolite catalyst for oxidation removal of dichlorobiphenyl in supercritical water. Zeolite is washed and modified with AgNO3 to prepare a substance M; the substance M is modified with a mixed solution prepared from polyvinylpyrrolidone, methanol, auric chloride, rhodium chloride trihydrate, ruthenium chloride trihydrate, concentrated hydrochloric acid and sodium borohydride to prepare a substance N; the substance N is modified with a mixed solution prepared from CoCl2, CuCl2, concentrated nitric acid, urea and ammonium fluoride to prepare a substance O; the substance O is modified with a mixed solution prepared from tetra-n-butyl titanate, tetraethyl orthosilicate and acetylacetone to prepare a substance P; the substance P is modified with a mixed solution prepared from SnCl4, SrCl2 and InCl3 to prepare a substance Q; the substance Q is modified with a mixed solution prepared from NiCl2, CeCl3, NaOH, Na2CO3 and CdCl2 to prepare a substance, namely the supported zeolite catalyst for oxidation removal of dichlorobiphenyl in supercritical water.

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 loaded zeolite 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 30-50MPa...

Claims

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Application Information

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IPC IPC(8): B01J23/89C02F1/72C02F101/36C02F101/34
CPCB01J23/8966C02F1/725C02F2101/34C02F2101/36
Inventor 不公告发明人
Owner 北京清水润土环保科技有限公司
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