Method for preparing photocatalyst for treating petroleum pollutants in water

A photocatalyst, petroleum-based technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high cost and harsh preparation conditions, and achieve absorption Wide range, simple preparation steps, high activity and longevity effects

Active Publication Date: 2013-04-03
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst uses silver with high cost as the catalyst, and a large amount of organic solvent is added during the experiment, the preparation conditions are relatively harsh and the cost is high

Method used

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  • Method for preparing photocatalyst for treating petroleum pollutants in water
  • Method for preparing photocatalyst for treating petroleum pollutants in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 10 g of titanyl sulfate, and use 300 g of deionized water to ultrasonically decompose and dissolve it into a solution. Add 10% ammonia water to adjust the pH of the reaction system to 9, precipitate for 15 min, and centrifuge to wash the precipitate until the conductivity of the eluate is below 20 μS / cm. Add 200ml of deionized water to the obtained white precipitate to make a slurry, add 15ml of hydrogen peroxide dropwise, and adjust the pH value to 7 with concentrated ammonia water to obtain a bright yellow transparent titanium sol.

[0031] Get 12g of copper nitrate solid, 18g of 50% manganese nitrate solution, add 20g of deionized water to dissolve into a solution, add 8g of 10% potassium permanganate solution under stirring conditions, and after reacting for 30 minutes, add 10% NaOH solution dropwise to adjust When the pH value of the slurry reaches 10, the stirring is stopped, and the slurry is spray-dried to obtain a composite metal catalyst precursor.

[0032...

Embodiment 2

[0035] Take 80g of titanyl sulfate, ultrasonically decompose and dissolve it into a solution with 2000g of deionized water. Add 5% ammonia water to adjust the pH value of the reaction system to 9, precipitate for 30 min, and centrifuge to wash the precipitate until the conductivity of the eluate is below 20 μS / cm. Add 1200ml of deionized water to the obtained white precipitate to make a slurry, add 100ml of hydrogen peroxide dropwise, and adjust the pH value to 7 with concentrated ammonia water to obtain a bright yellow transparent titanium sol.

[0036] Get copper nitrate solid 84g, 50% manganese nitrate solution 126g, add deionized water 140g to dissolve into solution, add 10% potassium permanganate solution 56g under stirring condition, after reacting for 60 minutes, add dropwise 30% NaOH solution to adjust When the pH value of the slurry reaches 12, the stirring is stopped, and the slurry is spray-dried to obtain a composite metal catalyst precursor.

[0037] Get 400g foa...

Embodiment 3

[0040] Take 40g of titanyl sulfate, and use 1000g of deionized water to ultrasonically decompose and dissolve it into a solution. Add 10% ammonia water to adjust the pH of the reaction system to 8, precipitate for 30 min, and centrifuge to wash the precipitate until the conductivity of the eluate is below 20 μS / cm. Add 800 ml of deionized water to the obtained white precipitate to make a slurry, add 60 ml of hydrogen peroxide dropwise, and adjust the pH value to 7 with concentrated ammonia water to obtain a bright yellow transparent titanium sol.

[0041] Get 36g of copper nitrate solid, 24g of 50% manganese nitrate solution, add 160g of deionized water to dissolve into a solution, add 64g of 10% potassium permanganate solution under stirring condition, after reacting for 60 minutes, add dropwise 30% NaOH solution to adjust When the pH value of the slurry reaches 12, the stirring is stopped, and the slurry is spray-dried to obtain a composite metal catalyst precursor.

[0042...

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Abstract

The invention relates to a method for preparing a photocatalyst for treating petroleum pollutants in water. The method is characterized in that titanium dioxide and Cu and Mn oxides are taken as active ingredients and are loaded on a floating type foaming ceramic carrier through adopting a rolling load technology. The method comprises the following specific steps: (a) dissolving titanyl sulfate into deionized water, regulating the pH value to 7-10 by using a 5-25% ammonia solution, cleaning the obtained white precipitate centrifugally, mixing the white precipitate with the deionized water, pulping and regulating the pH value to 7-10 under a mixing condition by using H2O2 and HCl so as to obtain titanium sol; (b) dissolving manganese salt and copper salt into the deionized water, mixing with a permanganate solution, dripping a NaOH solution to regulate the pH value to 8-12 and spray-drying the obtained size to obtain catalyst precursor powder; and (c) adding foaming ceramic balls into a rotary granulator, spreading the catalyst precursor slowing under the rolling condition, spraying titanium sol to be used as an adhesion agent, carrying out roll coating, drying and calcinating to obtain a catalyst finished product.

Description

Technical field: [0001] The invention relates to the field of catalyst manufacture and aims to provide a method for preparing a photocatalyst for treating petroleum pollutants on water surfaces. The catalyst of the invention is mainly used for removing petroleum organic pollutants on water surfaces. Background of the invention: [0002] With the massive exploitation, transportation and use of petroleum, a considerable amount of petroleum substances are discarded on the ground, in rivers and lakes and in the ocean. According to statistics, the oil and petroleum products that flow into the ocean through various channels account for about 0.5% of the world's total oil production, and the amount of oil poured into the ocean is as high as 1.0×l07 tons. The oil pollutants discharged into the ocean due to shipping Up to 1.6×l0 6 more than tons, about 1 / 3 of which was caused by oil spills caused by shipping accidents. There are hundreds of oil spill accidents at sea in my country ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C02F1/30
Inventor 苗静于海斌孙彦民滕厚开李晓云曾贤君李世鹏隋云乐周鹏
Owner CHINA NAT OFFSHORE OIL CORP
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