Structured catalyst for treating printing and dyeing wastewater and preparation method thereof

A technology for structured catalyst and printing and dyeing wastewater, which is applied in the textile industry wastewater treatment, oxidized water/sewage treatment and other directions, which can solve the problems of high energy consumption, unsuitable for wide application and high treatment cost

Inactive Publication Date: 2013-08-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of the electrolysis method is slightly better, but the energy consumption is large, the processing cost is high, and it is not suitable for wide application
Various processing methods have their own advantages, but also have certain limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the catalyst that is used for printing and dyeing wastewater treatment of the present invention, according to the following steps:

[0022] 1) Pretreatment of the cordierite honeycomb ceramic carrier: take a cordierite honeycomb ceramic carrier with the same specification, and smooth the outer surface with sandpaper; soak the cordierite honeycomb ceramic carrier in glacial acetic acid for 1 hour, rinse with distilled water, and keep at 110°C Dry at 550°C for 1 hour, bake at 550°C for 2 hours, and then cool naturally in the air for later use;

[0023] 2) Weigh 10 grams of activated alumina carrier with a balance, grind it into powder and pass it through a 120-mesh sieve, wash the catalyst carrier with distilled water until it is neutral, and then perform pretreatment: at 30 °C, place it in dilute HNO3 solution, dilute NaOH solution and H2O for pickling, alkali washing, water washing, and finally soaking and washing in water for 2 hours to take o...

Embodiment 2

[0032] Embodiment 2: preparation process is the same as embodiment 1, and the difference with embodiment 1 is:

[0033] Step 1) pretreatment of the cordierite honeycomb ceramic carrier: soak the cordierite honeycomb ceramic carrier in glacial acetic acid for 2 hours, rinse with distilled water, dry at 120°C for 1.5 hours, and bake at 600°C for 3 hours;

[0034] In step 2), 10 grams of activated alumina carrier is pretreated at 60 °C, and the last step of pretreatment is to soak and wash in water for 5 hours to take out;

[0035] At the end of step 2), the pretreated activated alumina carrier is calcined at 300°C, cooled naturally and then baked in a drying oven at 150°C for 10 hours for later use;

[0036] In step 3), weigh 4.349 grams of copper nitrate and 0.582 grams of nickel nitrate and two nitrates with a balance (the molar ratio of carrier to nitrate is 1:20×10 -4 ; The molar ratio of the two nitrates is 9:1);

[0037] In step 4), the activated alumina carrier treated...

Embodiment 3

[0043] Embodiment 3: preparation process is the same as embodiment 1, and the difference with embodiment 1 is:

[0044] Pretreatment of the cordierite honeycomb ceramic carrier in step 1): soak the cordierite honeycomb ceramic carrier in glacial acetic acid for 1.5 hours, rinse with distilled water, dry at 120°C for 1.5 hours, and bake at 600°C for 2.5 hours;

[0045] In step 2), 10 grams of activated alumina carrier is pretreated at 50°C, and finally soaked in water for 3 hours to take out;

[0046] In step 2), calcinate the activated alumina carrier after the final pretreatment at 400 °C, and dry it in a drying oven at 120 °C for 8 hours after natural cooling for later use;

[0047] In step 3), weigh 5.387 grams of ferric nitrate and 0.486 grams of cerium nitrate with a balance (the molar ratio of carrier to nitrate is 1:15×10 -4 ; The molar ratio of the two nitrates is 8:1);

[0048] In step 4), the activated alumina carrier treated in step 3) was baked at 120°C for 8 ho...

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PUM

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Abstract

The invention discloses a structured catalyst for treating printing and dyeing wastewater and a preparation method thereof. The catalyst comprises a main catalyst, a cocatalyst, activated alumina and cordierite ceramics, wherein the main catalyst is a soluble nitrate of any of Cu, Fe and Mn, and the cocatalyst is a soluble nitrate of any of Ce, Ni and Co. According to the preparation method, a powdery catalyst for treating printing and dyeing wastewater is coated on a cordierite carrier, a dispersant is added during preparation, highly-dispersed catalyst slurry is prepared, and the dispersion and stability of the powdery catalyst are improved. The structured catalyst prepared by the preparation method has the remarkable advantages of difficult active ingredient loss, simple process, reusability, low cost and the like; and when the structured catalyst is applied to the catalytic oxidative degradation of the wastewater, the pressure drop of a reaction system can be reduced, so that the wastewater treating efficiency is increased.

Description

technical field [0001] The invention relates to a preparation method of a structured catalyst for catalytic oxidation treatment of printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater comes from various production links in the printing and dyeing industry, mainly including scouring wastewater, desizing wastewater, mercerizing wastewater and bleaching wastewater discharged from the dyeing process in printing and dyeing production, dyeing wastewater and printing wastewater discharged from the dyeing and printing process, and wastewater discharged from the finishing process Alkali reduction wastewater, wastewater treatment, etc. Printing and dyeing wastewater has complex water quality, large discharge, high COD value, large chroma, poor biochemical properties, and many toxic and harmful substances. With the development of the economy, people are paying more and more attention to environmental issues, and the discharge standards of wastew...

Claims

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Application Information

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IPC IPC(8): B01J27/25C02F1/72C02F103/30
Inventor 黄凯朱科泾傅淑霞
Owner SOUTHEAST UNIV
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