Preparation method of photocatalyst for ultraviolet light catalytic degradation of organic matters in oilfield waste liquid

A technology of catalysts and compounds, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as restricting the development of petroleum industry, polluting the environment, complex components, etc., and achieve excellent photocatalytic activity, The preparation method is simple and the effect of promoting absorption and utilization

Active Publication Date: 2020-04-10
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In oil field production, chemical agents or chemical methods are used to improve working conditions and solve various chemical-related problems in the production process, but most of the additives added are organic substances with complex components and high viscosity , high turbidity, high stability, etc.
If these flowback fluids are discharged directly, the environment will be seriously polluted and the development of the petroleum industry will be restricted.

Method used

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  • Preparation method of photocatalyst for ultraviolet light catalytic degradation of organic matters in oilfield waste liquid
  • Preparation method of photocatalyst for ultraviolet light catalytic degradation of organic matters in oilfield waste liquid
  • Preparation method of photocatalyst for ultraviolet light catalytic degradation of organic matters in oilfield waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A Bi / Bi 4 o 5 Br 2 The preparation method of composite photocatalyst, the steps are as follows:

[0025] (1) Dissolve 1.9402g of bismuth nitrate pentahydrate in 35mL of glycerol with an analytical balance to obtain solution A; weigh 0.476g of potassium bromide and 0.0096g of isopropanol and dissolve in another 35mL of glycerin , to obtain solution B. (2) Start stirring the solution A and heat it to 50°C, add the solution B dropwise into the solution A with a rubber dropper, stir and react at a constant temperature of 50°C for 60min to obtain a mixed solution. (3) Transfer the mixed solution to a high-temperature and high-pressure reactor, react at 160°C for 16 hours, wash and collect the precipitate, and dry the precipitate in an oven at 70°C for 12 hours to obtain a precursor. (4) Weigh 0.4g of the precursor and add 100mL of distilled water, heat the water bath at 50°C, carry out the hydrolysis reaction under the irradiation of ultraviolet xenon lamp for 24h, and d...

Embodiment 2

[0027] A Bi / Bi 4 o 5 Br 2 The preparation method of composite photocatalyst, the steps are as follows:

[0028] Steps (1)-(3) are the same as in Example 1. Step (4): Weigh 0.4g of the precursor and add 100mL of distilled water. First, irradiate the reaction with UV lamp at the water bath temperature of 50°C for 7h, then raise the temperature of the water bath to 70°C, and continue to irradiate with the UV lamp for 17h. After the hydrolysis is completed, then transfer to Remove the water bath and turn off the UV lamp. After the aqueous solution is naturally cooled to room temperature, filter it, and dry the precipitate at 70°C for 12 hours. The black powder obtained is Bi / Bi 4 o 5 Br 2 composite photocatalyst.

Embodiment 3

[0030] Steps (1)-(3) are the same as in Example 1. Step (4): Weigh 0.4g of the precursor and add 100mL of distilled water, heat the water bath at 70°C, carry out the hydrolysis reaction under the irradiation of ultraviolet xenon lamp for 24h, and dry the obtained precipitate at 70°C for 12h, the obtained black powder is Bi / Bi 4 o 5 Br 2 composite photocatalyst.

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Abstract

The invention discloses a preparation method of a Bi / Bi4O5Br2 composite photocatalyst for oilfield waste liquid treatment. The method comprises the following steps: S1, dissolving a bismuth-containingcompound in glycerol to obtain a solution A, dissolving a bromine-containing compound and a carbon-containing compound into another part of glycerol to obtain a solution B; S2, dropwise adding the solution B into the solution A, stirring, heating to 40-70 DEG C, and continuously stirring to react for 40-90 min to obtain a mixed solution; S3, putting the mixed solution obtained in step S2 into a high-temperature and high-pressure reaction kettle, heating to 140-180 DEG C, reacting for 14-18 h, and drying the obtained precipitate to obtain a precursor; and S4, adding the precursor into distilled water, carrying out a hydrolysis reaction for 21-26 h at a water bath temperature of 40-70 DEG C under the irradiation of an ultraviolet lamp, and drying the obtained precipitate to obtain the blackBi / Bi4O5Br2 composite photocatalyst. The composite photocatalyst is used for photocatalytic degradation treatment of organic pollutants in the oilfield waste liquid under an ultraviolet light condition.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a Bi / Bi catalyst that can photocatalytically degrade and treat organic pollutants in oilfield waste liquid under ultraviolet light conditions. 4 o 5 Br 2 Preparation method of composite photocatalyst. Background technique [0002] Oilfield chemistry is a science that studies chemical problems in oilfield drilling, oil production and crude oil gathering and transportation. It is the youngest discipline in petroleum science, and it is composed of three parts: drilling chemistry, oil production chemistry and gathering and transportation chemistry. These components constitute the research object of oilfield chemistry. In oil field production, chemical agents or chemical methods are used to improve working conditions and solve various chemical-related problems in the production process, but most of the additives added are organic substances with complex components and high v...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J35/00C02F1/32C02F101/30
CPCB01J27/06C02F1/32C02F2101/30C02F2305/10B01J35/39Y02W10/37
Inventor 张旭刘卫华杨萍王均焦国盈王琦杨博张瀛石书强丁忠佩梁兵孙风景叶长青谭洪超吴俊霖王捷吕虹
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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