Method for realizing catalytic wet oxidation of wastewater containing organic substances

A technology that catalyzes wet oxidation and organic matter, applied in chemical instruments and methods, physical/chemical process catalysts, catalyst carriers, etc., can solve the problem of low catalyst activity

Active Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low catalyst activity when dealing with high-concentration organic-containing wastewater in the existing catalytic wet oxidation technology, and a new method for catalytic wet oxidation of organic-containing wastewater is provided

Method used

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  • Method for realizing catalytic wet oxidation of wastewater containing organic substances

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Experimental program
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Embodiment 1

[0017] Using anatase-type nano-titanium dioxide powder and NaOH solution as raw materials, 20 g of nano-titanium dioxide powder and 500 mL of NaOH (10 mol / L) solution were mixed in a 1 L autoclave by hydrothermal method, and stirred at 100 ° C for 48 h. After the mixed solution was centrifuged, the solid precipitate was washed once with 1mol / L HCl solution, and then washed to neutrality with distilled water, and the obtained carrier precursor was dried in an oven at 100°C for 24 hours to obtain titanium dioxide nanotubes; 5g titanium dioxide The equal volume of nanotubes was impregnated in 0.3750g RuCl 3 ﹒ nH 2 O in aqueous solution for 12 h, and then dried in an oven at 100 °C for 12 h, and the obtained catalyst precursor was reduced for 3 h at 350 °C in a hydrogen atmosphere to prepare Ru / TiO 2 Catalyst WAO-01. In a 1L autoclave, with 4g Ru / TiO 2 As a catalyst, treat 600mL of acrylic acid wastewater with a COD of 28600mg / L, react at 200°C and an oxygen pressure of 5MPa f...

Embodiment 2

[0020] In a 1L autoclave, 20g of nano titanium dioxide powder and 500mL of NaOH (1mol / L) solution were mixed and stirred at 180°C for 48h. After the mixed solution was centrifuged, the solid precipitate was washed once with 1mol / L HCl solution, and then washed to neutrality with distilled water, and the obtained carrier precursor was dried in an oven at 100°C for 24 hours to obtain titanium dioxide nanotubes; 5g titanium dioxide The equal volume of nanotubes was impregnated with 0.1150g PdCl 2 in the aqueous solution for 12h, dried in an oven at 100°C for 12h, and the obtained catalyst precursor was reduced for 3h in a hydrogen atmosphere at 550°C to obtain Pd / TiO 2 Catalyst WAO-02. In a 1L autoclave, with 4g Pd / TiO 2 As a catalyst, treat 600mL of acrylic acid wastewater with a COD of 28600mg / L, react at 250°C and an oxygen pressure of 8MPa for 120min, and the COD removal rate is 96.6%; treat 600mL of industrial acrylonitrile wastewater with a COD of 29600mg / L, at 260°C, Un...

Embodiment 3

[0023] In a 1L autoclave, mix 20g of nano titanium dioxide powder and 500mL of 6mol / L NaOH solution, and stir at 130°C for 48h. After the mixed solution was centrifuged, the solid precipitate was washed once with 1mol / L HCl solution, and then washed to neutrality with distilled water, and the obtained carrier precursor was dried in an oven at 100°C for 24 hours to obtain titanium dioxide nanotubes; 5g titanium dioxide The nanotubes were impregnated with equal volume in the solution containing 0.1250g H 2 PtCl 6 12h in the aqueous solution, and then dried in an oven at 100°C for 12h, the obtained catalyst precursor was reduced at 600°C for 3h in a hydrogen atmosphere to obtain Pt / TiO 2 Catalyst WAO-03. In a 1L autoclave, with 4g Pt-Pd / TiO 2 As a catalyst, treat 600mL of acrylic acid wastewater with a COD of 28600mg / L, react at 160°C and an oxygen pressure of 4MPa for 30min, and the COD removal rate is 98.8%; treat 600mL of industrial acrylonitrile wastewater with a COD of 29...

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Abstract

The invention relates to a method for realizing catalytic wet oxidation of wastewater containing organic substances, which mainly solves the problem that high-concentration organic wastewater is difficult to treat in the prior art. The technical scheme of the method comprises the following step: by taking noble metal loaded nano titanium dioxide as a catalyst, enabling organic wastewater to be in contact with the catalyst in a high-pressure reaction kettle for 30-120 minutes under the conditions that the reaction temperature is 120-260 DEG C and the oxygen gas pressure is 1-10 MPa, wherein the used catalyst comprises the following components in parts by weight: A) 97-99.8 parts of titanium dioxide nanotube, and B) 0.2-3 parts of at least one of Ru, Pd, Pt, Au or Rh loaded on the nanotube. Thus, the problem is well solved; and the method can be used for industrial production of organic wastewater treatment.

Description

technical field [0001] The invention relates to a method for catalytic wet oxidation of waste water containing organic matter. Background technique [0002] Due to the characteristics of non-toxic and cheap, water is often used as a reaction solvent, medium or cooling liquid in the chemical production process. Therefore, the water quality is inevitably damaged during the application process, and with the vigorous development of the chemical industry , water pollution is on the rise year by year, and the pollution of toxic organic substances to water is particularly serious. This kind of pollutant has the characteristics of large discharge, wide pollution area and refractory biodegradation, which has seriously threatened human life and restricted the development of chemical industry. [0003] Wet oxidation is an oxidation technology developed by American scientist Zimmermann in the 1950s to effectively treat toxic, harmful, and high-concentration organic wastewater. This me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J23/46B01J23/44B01J23/42B01J32/00B01J21/06C02F101/30C02F101/34C02F101/38
Inventor 陈航宁郭宗英郑育元汪国军顾松园
Owner CHINA PETROLEUM & CHEM CORP
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