Supported foam iron catalyst used for dimethylformamide removing by supercritical water oxidation

A technology for dimethylformamide and supercritical water oxidation, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, oxidized water/sewage treatment, etc., and can solve the problem of lack of stability of catalysts Poor, low catalytic activity, etc.

Inactive Publication Date: 2017-02-15
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...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] (1) Wash 117g 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 2.68mol / 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 foam iron catalyst used for dimethylformamide removing by supercritical water oxidation. Foam iron is cleaned and then modified by AgNO3 to prepare a substance M; the substance M is modified by a mixed liquor to prepare a substance N, wherein the mixed liquor is prepared from polyvinylpyrrolidone, methyl alcohol, trihydrate rhodium chloride, concentrated hydrochloric acid and sodium borohydride; the substance N is modified by a mixed liquor to prepare a substance O, wherein the mixed liquor is prepared from MgC12, ZnC12, concentrated nitric acid, urea and ammonium fluoride; the substance O is modified by a mixed liquor to prepare a substance P, wherein the mixed liquor is prepared from tetra-n-butyl titanate, tetraethyl orthosilicate and acetylacetone; the substance P is modified by a mixed liquor by a mixed liquor to prepare a substance Q, wherein the mixed liquor is prepared from ZrC14, PbC12 and CeC13; and the substance Q is modified by a mixed liquor to prepare the supported foam iron catalyst used for dimethylformamide removing by supercritical water oxidation, wherein the mixed liquor is prepared from NiC12, AlC13, NaOH, Na2CO3 and CoC12.

Description

technical field [0001] The invention belongs to the technical field of supercritical water oxidation for refractory organic wastewater treatment, and particularly relates to a supported foam iron catalyst used for supercritical water oxidation to remove dimethylformamide. 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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IPC IPC(8): B01J23/89B01J35/04C02F1/72C02F101/38
CPCB01J23/8966B01J35/04C02F1/725C02F2101/38C02F2305/02
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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