Bisphenol S high-concentration waste water pre-treatment technology

A high-concentration wastewater and pretreatment technology, which is applied in the direction of adsorption of water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc. Easy regeneration, wide application range, good adsorption effect

Inactive Publication Date: 2016-01-13
NANTONG BOTAO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently widely used solid adsorbents include activated carbon, diatomaceous earth, sulfonated coal, etc., but these adsorbents have poor adsorption effect and narrow scope of application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The bisphenol S high-concentration wastewater pretreatment process of this embodiment, the specific steps of the process are as follows:

[0024] (1) Prepare 500mmDA201-C resin column;

[0025] (2) Put 300g of bisphenol S impurity-containing wastewater in the workshop (COD content 100000mg / L, phenol content 43500mg / L) in the dropping funnel, drop it slowly at room temperature, and let it pass through the prepared 500mmDA201-C In the type resin column, the liquid passing through the column is detected by a rapid analyzer;

[0026] (3) After the bisphenol S impurity wastewater is adsorbed and saturated in the resin for many times, 5% NaOH twice the amount of the resin is used for dropwise elution;

[0027] (4) After the elution is completed, use the same amount of water to elute 5% NaOH, and then the obtained eluate is acidified with dilute sulfuric acid, and the phenol is separated in water, and 30g of phenol can be recovered per 1000g of waste water, and the content is...

Embodiment 2

[0029] The bisphenol S high-concentration wastewater pretreatment process of this embodiment, the specific steps of the process are as follows:

[0030] (1) Prepare a 500mm NKA-2 type resin column;

[0031] (2) Put 300g of bisphenol S impurity-containing wastewater in the workshop (COD content 100000mg / L, phenol content 43500mg / L) in the dropping funnel, slowly drop it at room temperature, and let it pass through the prepared 500mmNKA-2 In the type resin column, the liquid passing through the column is detected by a rapid analyzer;

[0032] (3) After the bisphenol S impurity wastewater is adsorbed and saturated in the resin for many times, then dropwise elute with methanol twice the amount of the resin;

[0033] (4) After the elution is completed, the methanol is eluted with the same amount of water, and then the obtained eluate is used to recover phenol by distillation. Every 1000g of waste water can recover 20g of phenol, and the gas chromatography detection content is 90%....

Embodiment 3

[0035] The bisphenol S high-concentration wastewater pretreatment process of this embodiment, the specific steps of the process are as follows:

[0036] (1) Prepare 500mmH-103 resin column;

[0037] (2) Put 300g of bisphenol S impurity-containing wastewater in the workshop (COD content 100000mg / L, phenol content 43500mg / L) in the dropping funnel, slowly drop it in at room temperature, and let it pass through the prepared 500mmH-103 In the type resin column, the liquid passing through the column is detected by a rapid analyzer;

[0038] (3) After the bisphenol S impurity wastewater is adsorbed and saturated in the resin for many times, 5% NaOH twice the amount of the resin is used for dropwise elution;

[0039] (4) After the elution is completed, 5% NaOH is eluted with the same amount of water, and then the obtained eluent is acidified with dilute sulfuric acid, and the phenol is separated in water, and 35g of phenol can be recovered per 1000g of waste water, and the content i...

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PUM

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Abstract

The invention relates to a bisphenol S high-concentration waste water pre-treatment technology. The technology specifically comprises the steps of 1, preparing a macroporous resin column; 2, placing bisphenol S waste water containing impurities in a dropping funnel through slow dropping at room temperature to enable bisphenol S waste water to pass through the prepared macroporous resin column, and detecting column passing liquid with a quick tester; 3, conducting adsorption saturation on bisphenol S waste water containing impurities in resin multiple times, and then conducting dropwise adding elution with solution the amount of which is twice that of the resin; 4, eluting the solution with the same amount of clear water after elution, then post-treating obtained eluent, and recovering phenol. The technology has the advantages that adsorption is conducted on waste water by means of the macroporous resin, the adopted macroporous resin is characterized by being good in adsorption effect, capable of achieving desorption regeneration easily, stable in performance, wide in application range, high in practicality, capable of achieving comprehensive utilization and the like, and then waste water treatment cost is low and treatment effect is good.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a kind of bisphenol S high-concentration wastewater [0002] pretreatment process. Background technique [0003] The production process of bisphenol S adopts the sulfonation condensation reaction of slightly excess phenol and concentrated sulfuric acid under the action of mesitylene solvent, and uses methanol solution as solvent for recrystallization; a large amount of high-concentration wastewater and high-concentration wastewater will be produced during the production process. Contains phenol, mesitylene, methanol and a small amount of bisphenol S and its impurities. COD is as high as 100,000-150,000ppm, and phenol is sometimes as high as 30,000-50,000ppm; such high-concentration wastewater will cause the sewage treatment process to be unable to complete the treatment. The treatment is difficult and expensive, especially the high-concentration phenol-containing wastew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C07C37/82C07C39/04C02F101/34
Inventor 黄海涛王宏李桂萍
Owner NANTONG BOTAO CHEM
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