Furaldehyde-degrading cooperative ultrasomic wave and nanometer TiO2 method

An ultrasonic and furfural technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as hindering the healthy development of the industry, no non-toxic, resource-based treatment methods, etc., to avoid The effect of secondary environmental pollution

Inactive Publication Date: 2006-08-02
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for many years, the sewage treatment of furfural has been the bottleneck hindering the healthy development of the industry
Most of the furfural treatment methods reported in existing patents are the separation of mixtures, and no successful non-toxic and resource-based treatment methods have been reported so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 0.05g of anatase quasi-spherical nano-TiO 2 Uniformly disperse and suspend in 200mL of furfural aqueous solution with a concentration of 20mg / L, add H with a concentration of 20mg / L 2 o 2 8mL aqueous solution, adjust the pH to 8, perform power ultrasonic treatment at 45°C, take samples at regular intervals, centrifuge to get the supernatant, and perform UV-Visible (UV-Visible) spectroscopic measurement and follow-up analysis to measure the change of furfural content and the UV absorption of the solution peak variation. The results show that when the ultrasonic frequency is 18.5KHz and the power density is 12W / cm 3 At 60 minutes, the carbonyl group has been removed, and 45% of furfural has been converted into CO at 120 minutes. 2 and H 2 O. And when the power density is 20W / cm 3 At 30 minutes, the carbonyl group has been removed, and furfural has been completely converted to CO in 160 minutes. 2 and H 2 O.

Embodiment 2

[0025] 0.15g of anatase quasi-spherical nano-TiO 2 Uniformly disperse and suspend in 200mL of furfural aqueous solution with a concentration of 20mg / L, add H with a concentration of 20mg / L 2 o 2 15mL aqueous solution, adjust pH to 7, perform power ultrasonic treatment at 40°C, take samples at regular intervals, centrifuge to get the supernatant, and perform UV-Visible (UV-Visible) spectrometry follow-up analysis to measure the change of furfural content and the UV absorption of the solution peak variation. The results show that when the ultrasonic frequency is a mixed frequency of 20KHz and 30KHz, the phase difference is focused, and the power density is 25W / cm 3 At 30 minutes, the carbonyl group has been removed, and furfural has been completely converted to CO in 160 minutes. 2 and H 2 O. Compared with other conditions being the same, no nano-TiO 2 Participating in the catalytic reaction, even after 180 minutes of treatment, the carbonyl group cannot be completely remo...

Embodiment 3

[0027] 0.10g of anatase quasi-spherical nano-TiO 2 Loaded on 15g of quartz glass microspheres (the apparent average diameter is 0.5mm), uniformly dispersed and suspended in 200mL of furfural aqueous solution with a concentration of 20mg / L under low-speed stirring, and added H with a concentration of 20mg / L 2 o 2 20mL aqueous solution, adjust the pH to 5.5, perform power ultrasonic treatment at 35°C, and take samples regularly. It can be easily settled and centrifuged. The supernatant was taken, and subjected to UV-Visible (UV-Visible) spectrometry follow-up analysis to measure the change of furfural content and the variation of the UV absorption peak of the solution. The results show that when the ultrasonic frequency is a mixed frequency of 22KHz and 40KHz, the phase difference is focused, and the power density is 25W / cm 3 At 30 minutes, the carbonyl group has been removed, and at 120 minutes, furfural has been completely converted into CO 2 and H 2 O.

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Abstract

The present invention is synergistic furaldehyde-degrading ultrasonic wave and nanometer TiO2 method. The method features that nanometer TiO2 is first dispersed inside furaldehyde solution or loaded on carrier and suspended inside furaldehyde solution, and H2O2 solution is added; and the furaldehyde solution is then ultrasonic treated for being degraded into harmless CO2 and water. The method of the present invention can decarbonylate furaldehyde in 60 min and degrade furaldehyde into harmless CO2 and water in 3 hr, and has excellent application foreground in degrading waste water containing toxic furaldehyde and other harmful compound.

Description

technical field [0001] The invention relates to a method for degrading furfural, in particular to an ultrasonic synergistic nano-TiO 2 Method for degrading furfural. Background technique [0002] Ultrasonic waves can produce some extreme conditions in the medium commonly used in chemical reactions, and produce local and instantaneous ultra-high temperature and ultra-high pressure. This energy can not only stimulate and induce many chemical reactions, speed up chemical reactions, and even change some chemical reactions. Direction produces unexpected effects. Maitsev of the former Soviet Union studied the influence of ultrasonic waves on heterogeneous catalytic processes earlier, and found that ultrasonic waves can increase the single-pass conversion rate by nearly 10 times. The reason is that it increases the dispersion of the catalyst. In recent years, Han et al. investigated low-intensity ultrasound (≤10W / cm 2 ) under the Reformatsky reaction, it was found that after 30 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/48C02F1/36C02F1/58B01J21/06C02F101/34
Inventor 陈飞杨治中丁恩勇
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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