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Catalyzer for catalyzing wet oxidation in treating wastewater of sensitization glue, and its application

A catalyzed wet oxidation and catalyst technology, which is applied in the oxidation water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of poor biodegradability, no good treatment method, Deep chromaticity and other problems, to achieve the effect of improving biodegradability and improving the efficiency of catalytic wet oxidation reaction

Inactive Publication Date: 2004-05-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In addition to the methods mentioned above, there are also biological methods, ion exchange methods, etc. These methods are effective for the control of major organic pollutants, but generally have low treatment efficiency, secondary pollution, complex process flow, and inability to directly meet the discharge standards. and other shortcomings
[0008] Photosensitive adhesive wastewater is a kind of high-concentration, refractory organic wastewater produced during the industrial production of photosensitive adhesive. It mainly contains photosensitive resin, phenolic resin, dyes and solvents, etc. It has high COD value, poor biodegradability, color Deep depth and high viscosity, there is no better treatment method at this stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Catalyst WR-2

[0020] Preparation of catalyst WR-2: 20g of TiSO 4 and an equal amount of ZrSO 4 Dissolve in 500ml of distilled water, and after it is completely dissolved, add 1M NaOH solution dropwise to it until the pH value is 10, then filter, and wash the obtained precipitate repeatedly until the SO in the washing liquid 4 2- and Na + The concentration of the filter cake is less than 0.1ppm, and the resulting filter cake is extruded; then dried at 120°C for 12 hours, and then roasted at 600°C for 12 hours, using the TiO-ZrO prepared above as a carrier, and then The main active components Pt, Ru and auxiliary components La, Ce were impregnated by equal volume impregnation method, which loaded Pt2%, Ru1%, La1%, Ce1%, and then dried at 60 and 120°C for 12 hours , and finally calcined at 550°C for 8 hours to obtain the catalyst WR-2.

[0021] Treatment of Photosensitive Resin Wastewater Using Catalytic Wet Oxidation Technology

[0022] The COD value of wastewater...

Embodiment 2

[0024] Catalyst PH-1

[0025] Preparation of catalyst PH-1: The preparation method of carrier TiO-ZrO is the same as that in Example 1. Then use the method of equal volume impregnation to impregnate the main active components Pd, RH and auxiliary components La, Ce which are loaded with Pd4%, Rh0.5%, Pr0.3%, Nd3.5%; and then respectively at 60 and 120 It was dried at ℃ for 12 hours, and finally calcined at 550℃ for 8 hours to obtain the catalyst PH-1.

[0026] Treatment of Photosensitive Resin Wastewater Using Catalytic Wet Oxidation Technology

[0027] The COD value of wastewater is 24,000mg / l, at pH 7, at 6.6Mpa, 260°C, and space velocity 2 -1 , Gas / H 2 O (body), under the reaction condition of 240, adopt catalyst WR-2, after catalytic wet oxidation method treatment, the COD value of waste water is 186mg / l, and pH is 3~4, and the removal rate of COD is 99.2%; And its BOD 5 / COD cr From less than 0.02 to greater than 0.6, this kind of wastewater can be treated by the com...

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PUM

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Abstract

A catalyst for treating the photoresist sewage by catalytic wet oxidizing process is prepared from the active component chosen from Pt, Pd, Rh and Ru, the auxiliary component chosen from La, Ce, Pr and Nd, and TiO2-ZrO2 carrier through baking at 60-180 deg.c for 2-18 hrs and calcining at 300-800 deg.C for 2-18 hrs. It is applied under the conditions: 220-280 deg.c for reaction temp, 4-8 MPa for reaction pressure, 50-300 for air / sewage ratio and 0.5-6 / hr for space speed. Its advantages are high reaction efficiency, high removal rate of COD up to 99%, and high BOD5 / CODcr ratio increased from 0.02 to 0.6.

Description

technical field [0001] The invention relates to the treatment of photosensitive glue wastewater, in particular to a catalyst for catalytic wet oxidation treatment of photosensitive glue wastewater and its application. The invention is also suitable for treating other similar high-concentration and refractory industrial organic wastewater. Background technique [0002] Since the development and production of many organic industrial products by humans, it has greatly enriched and developed human social civilization; however, the pollution of the natural environment during the production of organic industrial products has become increasingly common and serious; in pharmaceuticals, pesticides, dyes, spices, photosensitive Most of the organic substances discharged from the production process of materials and surfactants are complex in structure, toxic and harmful, and difficult to biodegrade, which is the difficulty and focus of wastewater treatment; One of the focal points of r...

Claims

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Application Information

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IPC IPC(8): B01J23/63C02F1/72G03C5/31G03C7/44
Inventor 杨民孙承林王贤高杜鸿章肖羽堂于永辉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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