Supported vanadium pentoxide catalyst for removing acrylonitrile by supercritical water oxidation

A vanadium pentoxide catalyst, supercritical water oxidation technology, 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, catalyst Problems such as poor stability and lack of

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

[0059] (1) 142g vanadium pentoxide particles with a particle size of 4-6mm were washed with 300mL deionized water and soaked in 500mL acetone for 1h. After filtration, the liquid was removed to obtain substance M0, which was obtained after washing with 300mL deionized water Substance M1: Put the substance M1 in 300mL of 2.5mol / L hydrochloric acid solution and soak for 0.5h, remove the liquid after filtration to obtain the substance M2. The substance M2 is washed with 300mL deionized water, and then 500mL with a mass percentage concentration of 95 After washing with 5% ethanol, place it in a drying oven at 85°C for 1.5 hours to obtain material M3, which is added to 250 mL AgNO with a molar concentration of 3.55mol / L 3 In the solution, shake in a shaker at 65°C for 75 minutes, cool to room temperature and filter to remove the liquid to obtain substance M4, which is washed with 100 mL of ethanol with a mass percentage of 97% and placed in a drying box at 76°C for 140 Minutes, then ...

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Abstract

The invention discloses a supported vanadium pentoxide catalyst for removing acrylonitrile by supercritical water oxidation. Vanadium pentoxide is cleaned and then is modified by AgNO3 to obtain a substance M; the substance M modifies a mixed solution prepared from polyvinylpyrrolidone, methanol, palladium dichloride, rhodium chloride trihydrate, concentrated hydrochloric acid and sodium borohydride to obtain a substance N; the substance N modifies a mixed solution prepared from MnCl2, CoCl2, concentrated nitric acid, urea and ammonium fluoride to obtain a substance O; the substance O modifies a mixed solution prepared from tetrabutyl titanate, tetraethyl orthosilicate and acetylacetone to obtain a substance P; the substance P modifies a mixed solution prepared from ZrCl4, ZrCl2 and CeCl3 to obtain a substance Q; the substance Q modifies a mixed solution prepared from PbCl2, BiCl3, NaOH, Na2CO3 and MgCl2 to obtain a substance, namely the supported vanadium pentoxide catalyst for removing the acrylonitrile by the supercritical water oxidation.

Description

Technical field [0001] The invention belongs to the technical field of supercritical water oxidation for the treatment of refractory organic wastewater, and particularly relates to a supported vanadium pentoxide catalyst used for supercritical water oxidation to remove acrylonitrile. 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 organics and oxygen, organics, oxidants and supercritical water form a homogeneous phase, the reaction will not be hindered and restricted 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℃, and the pressure is 30...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F1/72C02F101/38
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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