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Supported ceramic catalyst for acrylonitrile removal through supercritical water oxidation

A technology of supercritical water oxidation and ceramic catalyst, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, oxidized water/sewage treatment, etc. It can solve the problem of poor catalyst stability and low catalytic activity , missing and other issues

Inactive Publication Date: 2017-02-08
北京清水润土环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 acrylonitrile

Method used

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Experimental program
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Embodiment 1

[0068] (1) Wash 149 g of ceramic particles with a particle size of 4-6 mm with 300 mL of deionized water, soak in 500 mL of acetone for 1 h, remove the liquid after filtration to obtain substance M0, and obtain substance M1 after substance M0 is washed with 300 mL 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 4.33mol / 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 ...

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Abstract

The invention discloses a supported ceramic catalyst for acrylonitrile removal through supercritical water oxidation. The catalyst is prepared through the following steps: cleaning ceramic, and modifying with AgNO3 to prepare a substance M; modifying the substance M with a mixed solution prepared from polyvinylpyrrolidone, methanol, palladium dichloride, ruthenium trichloride trihydrate, concentrated hydrochloric acid and sodium borohydride to prepare a substance N; modifying the substance N with a mixed solution prepared from PbCl2, NiCl2, concentrated nitric acid, urea and ammonium fluoride to prepare a substance O; modifying the substance O with a mixed solution prepared from tetrabutyl titanate, tetraethyl orthosilicate and acetylacetonate to prepare a substance P; modifying the substance P with a mixed solution prepared from NbCl4, MnCl2 and CeCl3 to prepare a substance Q; and modifying the substance Q with a mixed solution prepared from CuCl2, AlCl3, NaOH, Na2CO3 and ZnCl2 to obtain a substance which is the supported ceramic catalyst for acrylonitrile removal through supercritical water oxidation.

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 ceramic catalyst for removing acrylonitrile by supercritical water oxidation. 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. O...

Claims

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Application Information

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IPC IPC(8): B01J23/89C02F1/72C02F101/38
CPCB01J23/8986C02F1/722C02F1/725C02F2101/38C02F2305/02
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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