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Composite catalyst used for industrial wastewater treatment via electrolytic oxidation, and preparation method thereof

A technology for composite catalysts and industrial wastewater, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, water/sewage treatment, etc., can solve the problems of low activity, easy clustering, and dispersion of active components In order to achieve the effect of high catalytic activity, good fluidization performance and good pertinence

Active Publication Date: 2014-04-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 1. The carrier has high true density, poor fluidization performance, and high energy consumption in actual application;
[0014] 2. The active components have poor dispersion and are easy to cluster;
[0015] 3. The catalyst has high cost and poor acid and alkali corrosion resistance;
[0016] 4. Low activity and short service life

Method used

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  • Composite catalyst used for industrial wastewater treatment via electrolytic oxidation, and preparation method thereof
  • Composite catalyst used for industrial wastewater treatment via electrolytic oxidation, and preparation method thereof
  • Composite catalyst used for industrial wastewater treatment via electrolytic oxidation, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Weigh 10g of polystyrene resin pellets, add them into 100ml of chloroform, add them into chloroform, slowly add 50ml of 30%-50% fuming sulfuric acid while stirring at room temperature, then sulfonate in a water bath at 60°C for 180min, and slowly Add absolute ethanol, suction filter, wash 3 times, and then wash with deionized water until there is no SO in the washing liquid 4 2- Check it out, and then dry it with a hair dryer for later use. This step is repeated several times to prepare a sufficient amount of sulfonated polystyrene resin for future use.

[0061] Equipped with Fe with a mass fraction of 8.10% 2+ Add 120ml of salt solution into a 200ml beaker and conduct ion exchange with 20g of sulfonated polystyrene resin at 25°C. The reaction time is 90min, then filter and wash the catalyst precursor for 5 times, place it in an oven and dry at 80°C for 360min to obtain the catalyst precursor A; Equipped with Mn with a mass fraction of 10.92% 2+ Add 120ml of salt so...

Embodiment 2

[0064] After adopting the same steps as in Example 1 to carry out sulfonation to the selected carrier, respectively use Fe with a mass fraction of 5.52% 2+ Salt solution, Mn with a mass fraction of 7.28% 2+ Salt solution, Cr with a mass fraction of 3.28% 3+ Salt solution, Cu with a mass fraction of 4.80% 2+ The salt solution and the sulfonated carrier were ion-exchanged at 20°C. After the reaction, it was detected that Fe in A 2+ The loading amount is 3.3%, Mn in B 2+ The loading amount is 3.4%, Cr in C 3+ The loading amount is 2.9%, Cu in D 2+ The load is 3.3%. The catalyst was prepared in the same steps as in Example 1.

[0065] Using the process parameters of Example 1, the same wastewater as in Example 1 was treated. After treatment, the COD of the effluent was 39 mg / L, and the COD removal rate was 74%.

Embodiment 3

[0067] Using the same steps as in Example 1, after the selected carrier is sulfonated, use the same mass fraction of Fe as in Example 1 2+ , Mn 2+ 、Cr 3+ 、Cu 2+ The salt solution and the sulfonated carrier were ion-exchanged at 45°C, and the reaction time was 900min. After the reaction, it was detected that Fe in A 2+ The loading amount is 7.3%, Mn in B 2+ The loading amount is 5.9%, Cr in C 3+ The loading amount is 7.5%, Cu in D 2+ The loading capacity is 7.2%. The catalyst was prepared in the same steps as in Example 1.

[0068] Using the process parameters of Example 1, the same wastewater as in Example 1 was treated. After treatment, the COD of the effluent was 35 mg / L, and the COD removal rate was 76.7%.

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Abstract

The invention discloses a composite catalyst used for industrial wastewater treatment via electrolytic oxidation, and a preparation method thereof, and belongs to the field of waste water treatment via electrolysis. The composite catalyst comprises a catalyst carrier and active components, wherein sulfonated polystyrene resin is used as the catalyst carrier, and metal ions including Fe<2+>, Mn<2+>, Cr<3+>, and Cu<2+> are taken as the active components. According to the preparation method, loading of the active component metal ions on the sulfonated polystyrene resin carrier is realized via ion exchange so as to obtain a catalyst precursor A, a catalyst precursor B, a catalyst precursor C, and a catalyst precursor D; and the catalyst precursors are mixed. The composite catalyst used for industrial wastewater treatment via electrolytic oxidation possesses following advantages: catalytic activity is high; dispersity of the active components is high; sulfuration performance is excellent; carrier true density is low; the composite catalyst possesses corrosion resistance; cost of treatment of waste water, which is difficult for biodegradation, is low; COD treatment efficiency is high; and service life is relatively long. The composite catalyst can be used as a filling material of electrolytic oxidation equipment for electrolytic oxidation of waste water, which is difficult for biodegradation; and waste water COD removal ratio is 75% or more.

Description

technical field [0001] The invention relates to a composite catalyst for industrial wastewater treatment by electrolytic oxidation and a preparation method thereof. It belongs to the treatment of wastewater by electrolysis. Background technique [0002] There are many types of refractory biodegradable industrial wastewater, and the treatment is difficult. [0003] The most commonly used process is advanced oxidation, such as Fenton reagent oxidation, ozone oxidation, wet oxidation, etc., all of which have disadvantages such as high processing costs and secondary pollution. Electrochemical oxidation, especially electrolytic catalytic oxidation, is a method that has gradually developed in recent years. A promising approach. Electrolytic catalytic oxidation refers to a process of electrolytic treatment of wastewater under the catalytic action of a catalyst. The advantages of this technique are: [0004] (1) The OH produced in the process has strong oxidative properties, and...

Claims

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Application Information

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IPC IPC(8): B01J31/10C02F1/461
Inventor 邹宗海李波潘咸峰刘婷婷
Owner CHINA PETROLEUM & CHEM CORP
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