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Super-dispersed zero-valent metal solid catalyst for water treatment, and preparation method thereof

A catalyst and transition metal technology, applied in the field of preparation of ultra-dispersed zero-valent metal solid catalysts for water treatment, can solve the problems of low activity and low oxidation system efficiency, and achieve the effect of expanding the pH range

Inactive Publication Date: 2020-02-18
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity of pure Fenton's reagent is still relatively low, and it is greatly affected by external conditions, especially the pH value. If the pH is greater than 3, it will precipitate, so it can only be used in a weakly acidic environment.
However, oil field wastewater is generally in a weakly alkaline environment, which leads to extremely low efficiency of conventional oxidation systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the first step, at room temperature, the transition metal salt is dissolved in the first solvent with 5 times its mass, and the transition metal salt is chemically pure FeCl 2 , the first solvent is chemically pure methanol;

[0019] In the second step, another carboxylic acid (phenol) compound is dispersed in a second solvent of 5 times its mass, the carboxylic acid (phenol) compound is chemically pure EDTA disodium salt, and the second solvent is chemically pure methanol;

[0020] In the third step, the transition metal salt solution prepared in the first step and the carboxylic acid (phenol) compound solution prepared in the second step are mixed according to the substance ratio of 1:2, and stirred evenly until they are completely dissolved, and the transition metal complex is obtained. thing;

[0021] In the fourth step, take montmorillonite with 5 times the mass of the transition metal salt, add it to the metal complex obtained in the third step, and stir for 4...

Embodiment 2

[0026] In the first step, at room temperature, the transition metal salt is dissolved in the first solvent 10 times its mass, and the transition metal salt is chemically pure FeCl 3 , the first solvent is deionized water;

[0027] In the second step, another carboxylic acid (phenol) compound is dissolved in a second solvent of 10 times its mass, the carboxylic acid (phenol) compound is chemically pure sodium phthalate, and the second solvent is chemically pure ethanol ;

[0028] In the third step, the transition metal salt solution prepared in the first step and the carboxylic acid (phenol) compound solution prepared in the second step are mixed according to the mass ratio of 1:2.5, and stirred evenly until they are completely dissolved, and the transition metal complex is obtained. thing;

[0029] In the fourth step, take montmorillonite 6 times the quality of the transition metal salt, add it to the metal complex obtained in the third step, and stir for 5 hours. The montmo...

Embodiment 3

[0034] In the first step, at room temperature, the transition metal salt is dissolved in the first solvent of 15 times its mass, and the transition metal salt is analytically pure Fe 2 (SO 4 ) 3 , the first solvent is analytically pure ethylene glycol;

[0035] In the second step, another carboxylic acid (phenol) compound is dissolved in a second solvent of 10 times its mass, the carboxylic acid (phenol) compound is analytically pure sodium malonate, and the second solvent is deionized water;

[0036] In the third step, the transition metal salt solution prepared in the first step and the carboxylic acid (phenol) compound solution prepared in the second step are mixed according to the ratio of substances of 1:3, and stirred evenly until they are completely dissolved, that is, the transition metal complex solution is obtained. thing;

[0037] In the fourth step, take montmorillonite with 8 times the quality of the transition metal, add it to the metal complex obtained in the...

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PUM

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Abstract

The invention relates to a super-dispersed zero-valent metal solid catalyst for water treatment, and a preparation method thereof. The catalyst is prepared by the following method: dissolving a transition metal salt in a first solvent; dissolving or dispersing a carboxylic acid (phenol) compound in a second solvent; mixing a transition metal salt solution and a carboxylic acid (phenol) compound solution to obtain a transition metal complex; adding montmorillonite into the metal complex; and then adding a borohydride, and performing stirring, filtering, washing and oven-drying. The metal catalyst can relatively thoroughly decompose polymers commonly used in oilfields such as guar gum, cellulose, starch, and polyacrylamide, a viscosity reduction rate is 90% or more, and the chemical oxygen consumption is reduced by 95% or more.

Description

technical field [0001] The invention relates to the technical field of cleaning oilfield pollutants, in particular to a method for preparing a super-dispersed zero-valent metal solid catalyst for water treatment. Background technique [0002] The petroleum industry is an important part of the national economy. Nowadays, most oil fields at home and abroad use a large amount of various polymers in the process of oil extraction, which makes the polymer content in the sewage produced by most oil fields high, and the resulting environmental pollution There are also problems to be solved. If the waste liquid is not treated or handled properly, it will cause serious damage to the formation and the ecological environment. At present, the method of treating sewage mainly selected in oil field is Fenton oxidation method. The advantage of this method is that it has higher oxidation activity and H 2 o 2 Under certain conditions, it can be decomposed to form highly oxidizing hydroxyl ...

Claims

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Application Information

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IPC IPC(8): B01J31/26C02F1/72C02F101/30C02F101/38C02F101/34
CPCB01J31/26C02F1/722C02F1/725B01J2531/842B01J2531/0213B01J2531/845B01J2531/847B01J2531/16B01J2531/26C02F2209/08C02F2305/026C02F2101/30C02F2101/38C02F2101/34B01J35/394
Inventor 汤颖薛玉莹李曌怡张洁都伟超
Owner XI'AN PETROLEUM UNIVERSITY
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