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Method for treating nonylphenol polyoxyethylene ether industrial wastewater

A technology of nonylphenol polyoxyethylene ether and treatment method, which is applied in the field of nonylphenol polyoxyethylene ether production wastewater treatment, and can solve the problems of difficult biodegradation of phenolic organic matter, high investment and operation costs of biochemical treatment processes, and waste of resources And other issues

Inactive Publication Date: 2012-03-21
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because phenolic organics in water are difficult to biodegrade, the investment and operation costs of biochemical treatment process are relatively high. At the same time, some products and intermediates in water are destroyed into small molecules during the treatment process, resulting in waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Put 100ml (about 75 grams) of Purolite MN-202 ultra-high cross-linked adsorption resin into a jacketed glass adsorption column (Φ32×360mm). At 0~40°C, the filtered industrial water discharged during the production of nonylphenol polyoxyethylene ether is passed through the resin bed at a flow rate of 750mL / h, and the treatment capacity is 6000mL / batch. Ethers such as NPEOn in raw water The concentration of organic matter is about 3164mg / L, COD Cr is 6145mg / L, and the adsorbed water is colorless and transparent, in which NPEOn and other organic ethers are about 48mg / L, COD Cr It was reduced to 688 mg / L, and the standard discharge could be achieved after conventional aerobic treatment.

[0017] Use 50mL 3.6mol / L NaOH aqueous solution, 100mL 1.8mol / L NaOH aqueous solution, and 200mL 95% methanol at a temperature of 75±5°C and flow through the resin bed at a flow rate of 150mL / h for desorption. NPEOn The desorption rate of organic ethers is >98%. The 200ml deso...

Embodiment 2

[0018] Example 2: Put 200ml (about 150 grams) of Purolite MN-202 ultra-high cross-linked adsorption resin into a jacketed glass adsorption column (Φ50×450mm). At 0~40°C, the filtered industrial water discharged during the production of nonylphenol polyoxyethylene ether is passed through the resin bed at a flow rate of 1500mL / h, and the treatment capacity is 12000mL / batch. NPEOn and other ethers in raw water The concentration of organic matter is about 3089mg / L, COD Cr It is 6067mg / L, and the adsorbed water is colorless and transparent, of which NPEOn and other ether organic substances are about 45mg / L, COD Cr It is reduced to 697 mg / L, which can reach the standard discharge after being treated by conventional aerobic process.

[0019] Use 100mL of 3.6mol / L NaOH aqueous solution, 200mL of 1.8mol / L NaOH aqueous solution, and 400mL of 95% methanol at a temperature of 75±5°C to pass through the resin bed at a flow rate of 300mL / h for desorption, NPEOn The desorption rate of orga...

Embodiment 3

[0020] Example 3: Divide 200ml (about 150g) of Purolite MN-202 ultra-high cross-linked adsorption resin into two parts and put them into jacketed glass adsorption columns (Φ32×360mm). At 0~40°C, pass the filtered industrial water discharged from the production process of nonylphenol polyoxyethylene ether through the resin bed at a flow rate of 750mL / h, with a treatment capacity of 12000mL / batch, NPEOn and other ethers in raw water The concentration of organic matter is about 3159mg / L, COD Cr It is 6123mg / L, and the adsorbed water is colorless and transparent, of which NPEOn and other ether organic substances are about 49mg / L, COD Cr It is reduced to 683 mg / L, which can reach the standard discharge after being treated by conventional aerobic process.

[0021] Use 50mL 3.6mol / L NaOH aqueous solution, 100mL 1.8mol / L NaOH aqueous solution, and 200mL 95% methanol at a temperature of 75±5°C and flow through the resin bed at a flow rate of 150mL / h for desorption. NPEOn The desorpti...

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PUM

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Abstract

The invention discloses a method for treating nonylphenol polyoxyethylene ether industrial wastewater, belonging to the field of sewage treatment. In the method, industrial wastewater, containing polyoxyethylene ether and other organic substances, discharged from a production process is introduced to pass through an MN-202 iso-ultrahigh crosslinked adsorbent resin bed layer to make the polyoxyethylene ether, nonyl phenol and other organic substances be adsorbed onto resins, so that the polyoxyethylene ether and other organic substances are effectively separated; yielding water subjected to resin adsorption can be discharged in a standard-reaching manner after being subjected to a conventional aerobic treatment process; and the resins subjected to adsorption operation are eluted by using a mixed solution of NaOH and methyl alcohol to obtain eluent containing the polyoxyethylene ether and the nonyl phenol, the elutent can be recycled and comprehensively utilized by being directly returned to a production procedure, and the resins can be reused after being eluted. The system disclosed by the invention has the characteristics of simplicity for operation and maintenance, high pollutant removal rate and the like, and can be used for preventing the nonyl phenol with an estrogen effect as well as the polyoxyethylene ether and metabolic products thereof from being discharged to the natural world.

Description

technical field [0001] The present invention relates to a method for treating waste water produced by nonylphenol polyoxyethylene ether, in particular, it is the effective treatment of waste water produced by nonylphenol polyoxyethylene ether and the recycling and utilization of pollutants in waste water by using ultra-high cross-linked resin . Background technique [0002] Nonylphenol polyoxyethylene ether (NPEOn for short) is the most widely used alkylphenol polyoxyethylene ether, accounting for about 80% of its output, and is the second largest category of non-polyoxyethylene ether after fatty alcohol polyoxyethylene ether (APE). ionic surfactant. Main uses are: emulsion polymerization and polymer stabilizer in plastics and synthetic rubber, textile processing, agrochemicals, pulp and paper technology, metal and mineral processing, latex coatings, wetting agents and emulsifiers, blowing agents, inks , adhesives and pharmaceuticals, but also commercial laundry detergents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/02C02F1/28C08G65/28C08G65/30
CPCY02W10/10
Inventor 杨维本任丽郑芳芳薛小旭陆祎品李娜
Owner NANJING NORMAL UNIVERSITY
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