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Method for recovering and treating phenolic wastewater

A treatment method and technology for phenolic wastewater, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems that are difficult to achieve stability, reliability and safety, and achieve comprehensive treatment and recycling of resources, stable and reliable operation, and simple process

Active Publication Date: 2010-11-17
SHANDONG WEIFANG RAINBOW CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods have their own advantages and disadvantages, but from the perspective of comprehensive management, it is difficult to achieve the purpose of stability, reliability and security

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Preparation of Compound Salt Catalyst

[0025] Take 87.0g of copper nitrate, 107.1g of zinc nitrate, and 67.5g of aluminum nitrate to prepare 300g of solution, add 207.5g of citric acid to the solution, and then keep the constant temperature in a super constant temperature water bath at 60°C and stir vigorously. After a period of time, the solution gradually becomes a sol, and the stirring is continued, and the sol gradually becomes a wet gel again. When stirring is difficult, stop stirring, take out the wet gel, and dry it into a dry gel in a drying oven at 120°C. Grind the xerogel into powder, then place it in a muffle furnace at 500°C for 5 hours, take it out and grind it into powder, and select the catalyst with a particle size of 200-300 mesh for use.

[0026] Step 2: Treatment of phenolic wastewater

[0027] Take 300g of phenol-containing wastewater with a phenol content of 2100mg / L and an ortho-chlorophenol content of 2050mg / L, add 0.44g of 37wt% formal...

Embodiment 2

[0029] Step 1: Preparation of Compound Salt Catalyst

[0030] Take 130.5g of copper nitrate, 53.5g of zinc nitrate, and 67.5g of aluminum nitrate to prepare 300g of solution, add 138.0g of citric acid to the solution, and then keep the constant temperature in a super constant temperature water bath at 75°C with vigorous stirring. After a period of time, the solution gradually becomes a sol, and the stirring is continued, and the sol gradually becomes a wet gel again. When stirring is difficult, stop stirring, take out the wet gel, and dry it into a dry gel in a drying oven at 140°C. Grind the xerogel into powder, then place it in a muffle furnace at 700°C and bake it for 7 hours, take it out and grind it into powder, and select the catalyst with a particle size of 200-300 mesh for future use.

[0031] Step 2: Treatment of phenolic wastewater

[0032] Take 300g of phenol-containing wastewater with a phenol content of 1110mg / L and a p-chlorophenol content of 1060mg / L, add 0.30...

Embodiment 3

[0034] Step 1: Preparation of Compound Salt Catalyst

[0035]Take 87.0g of copper nitrate, 107.1g of zinc nitrate, and 67.5g of aluminum nitrate to prepare 300g of solution, add 172.9g of citric acid to the solution, then keep constant temperature in a super constant temperature water bath at 70°C, and stir vigorously. After a period of time, the solution gradually becomes a sol, and the stirring is continued, and the sol gradually becomes a wet gel again. When stirring is difficult, stop stirring, take out the wet gel, and dry it into a dry gel in a drying oven at 130°C. Grind the xerogel into powder, then place it in a muffle furnace at 600°C for 6.5 hours, take it out and grind it into powder, and select the catalyst with a particle size of 200-300 mesh for use.

[0036] Step 2: Treatment of phenolic wastewater

[0037] Take 300g of phenol-containing wastewater with a phenol content of 1570mg / L and an o-chlorophenol content of 1585mg / L, add 0.38g of 36wt% formaldehyde sol...

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Abstract

The invention discloses a method for recovering and treating phenolic wastewater, which comprises the following steps of: adding solution of formaldehyde and a base catalyst into the phenolic wastewater to perform substitution reaction, and then adding the solution of formaldehyde and the base catalyst into the phenolic wastewater again to perform substitution and polycondensation reaction; after reaction, separating the obtained phenolic resin from the wastewater, and then treating the wastewater by the next step; further treating the separated wastewater by a catalytic wet oxidation process; and finally, performing biological treatment on the phenolic wastewater to meet the emission requirement. The method has the advantages of simple process, stable, reliable and safe operation, and capacity of well treating the phenol and chlorophenol-containing wastewater, so that the wastewater reaches the emission standard, the phenol in the wastewater can be converted into the phenolic resin at the same time to be recycled, and the comprehensive treatment and recycling of the wastewater are realized.

Description

technical field [0001] The invention relates to a method for recovering and treating phenol-containing wastewater, in particular to a method for treating phenol- and chlorophenol-containing wastewater and recovering phenol resources in the wastewater. technical background [0002] Phenol-containing wastewater is a kind of industrial wastewater with great hazards and a wide range of pollution. It mainly contains various phenolic compounds, such as phenol, chlorophenol, cresol and nitrocresol. Phenol-based compounds are protoplasmic poisons, which can coagulate proteins and cause toxicity to living organisms. People who drink water contaminated by phenols for a long time will cause dizziness, anemia and various nervous system diseases. Phenol-containing wastewater is listed as one of the key wastewater in my country's water pollution control. At present, domestic phenol-containing wastewater treatment technologies include physical, chemical and biological methods. Among them...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 孙国庆李志清赵广理陈琦侯永生
Owner SHANDONG WEIFANG RAINBOW CHEM
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