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Preparation method of photoelectrocatalytic oxidation catalyst for treating high-salinity wastewater

An oxidation catalyst, high-salt wastewater technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sewage treatment and other directions, can solve the problems of complex preparation process, expensive raw materials, large pollution, etc., achieve simple preparation steps, High activity and longevity, evenly distributed effect

Active Publication Date: 2012-12-05
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the treatment effect on high-salt wastewater is not mentioned in the article, and the catalyst uses organic tetrabutyl titanate as a raw material and is made through multiple steps. The preparation process is complicated, the raw materials are expensive and polluted, and industrial scale-up is difficult.

Method used

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  • Preparation method of photoelectrocatalytic oxidation catalyst for treating high-salinity wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 79.2g (NH 4 ) 2 TiF 6 , add 800ml of water to make 0.1mol / L solution A; take 49.6gH 3 BO 3 , add water to make 0.2mol / L solution B. The above two solutions A and B were mixed and diluted to 2 L to obtain a mixed solution.

[0031] 500g porous Al 2 O 3 Carrier (commercially available model TC-01) The diameter of the carrier is 7mm, the number of side openings is 3, and the specific surface area is 10-15m 2 / g, pore volume 0.1-0.3ml / g, water absorption 30-40%, crushing strength 120-150N / cm, pour into the mixture, and deposit in liquid phase at room temperature for 48hrs. After the time is up, take it out, dry it at 110°C for 4 hours, and bake it at 600°C for 3 hours to obtain the finished photocatalyst. The content of catalyst active components is listed in Table 1.

[0032] Catalyst performance evaluation is achieved by the following devices:

[0033] Reactor: fixed-bed photocatalytic reactor, with two electrodes on both sides, the middle part is filled wi...

Embodiment 2

[0040] After the active components were prepared, they were deposited in liquid phase at room temperature for 120 hours, and the rest of the catalyst preparation steps were the same as in Example 1. The content of catalyst active components is listed in Table 1.

[0041] This catalyzer is tested with the method as in embodiment 1, and the evaluation result of its catalyzer sees figure 1 .

Embodiment 3

[0043] After the preparation of the active component solution, liquid phase deposition was carried out at 60° C. for 24 hours, and the rest of the catalyst preparation steps were the same as in Example 1. The content of catalyst active components is listed in Table 1.

[0044] This catalyzer is tested with the method as in embodiment 1, and the evaluation result of its catalyzer sees figure 1 .

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Abstract

The invention relates to a preparation method of a photoelectrocatalytic oxidation catalyst for treating high-salinity wastewater. The photoelectrocatalytic oxidation catalyst is prepared by steps of utilizing porous Al2O3 as a carrier, loading active component TiO2 onto the carrier by means of liquid-phase deposition and then drying and calcining to prepare the photoelectrocatalytic oxidation catalyst. The prepared catalyst is in the shape of a porous cylinder, fluid and ultraviolet light can access the inside of the photoelectrocatalytic oxidation catalyst freely, and particles of the active component TiO2 are small in particle size and uniform in distribution.

Description

technical field [0001] The invention relates to the field of catalyst manufacture and aims to provide a method for preparing a photoelectric catalytic oxidation catalyst for treating high-salt wastewater. The catalyst of the invention is mainly used for deep removal of organic pollutants in high-salt wastewater by photoelectric catalytic oxidation. Background technique [0002] Salt wastewater has a wide range of sources and a large amount of discharge. Steam boilers, desalination equipment, power plant cooling towers, oil fields, mining enterprises, etc. discharge a large amount of high-concentration saline wastewater. Many oilfield wastewaters in my country have a high salt content. Due to the high salinity and high conductivity of salty wastewater, it can accelerate the electrochemical reaction and accelerate the corrosion of equipment; if high-salt wastewater is discharged into the surrounding farmland, it may cause land salinization, soil compaction, crop rot, and dea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/32C02F1/58C02F1/48C02F1/78
Inventor 苗静于海斌滕厚开孙彦民李晓云谢陈鑫曾贤君李世鹏
Owner CHINA NAT OFFSHORE OIL CORP
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