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Treatment method for fused ring compound wastewater

A compound and wastewater technology, applied in the separation/purification of carboxylic acid compounds, boron oxide compounds, chemical instruments and methods, etc., can solve the problems of high cost and inability to recycle waste water of polycyclic compounds, so as to reduce the cost of treatment, The effect of improving market competitiveness and reducing production costs

Active Publication Date: 2015-03-25
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The cost of the above method is high, and it cannot maximize the resource treatment of polycyclic compound wastewater

Method used

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  • Treatment method for fused ring compound wastewater
  • Treatment method for fused ring compound wastewater
  • Treatment method for fused ring compound wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Put 120ml of HYA-106 macroporous resin (Xi'an Hanyu Resin Technology Co., Ltd.) into the packed exchange column, leaving a 3-5cm water layer on it. The condensed ring compound wastewater is first adsorbed with activated carbon with a mass fraction of 0.1% for 30 minutes, the color changes from red to light brown, and then passes through the resin layer at a flow rate of 1BV / hr (1 times the resin volume per hour), and the column material liquid is periodically sampled and analyzed. COD and the content of phthalic acid in the feed liquid, when the COD value of the wastewater discharged from the column is higher than 3000mg / L, stop passing the column. After the resin stops treating wastewater, first use 1BV of deionized water to replace the wastewater at a rate of 1BV / hr, and then use 2BV of 4% sodium hydroxide solution to analyze the macroporous resin. The analysis temperature is 70-80°C. The flow rate of the sodium oxide solution is 1BV / hr. After the analysis is comp...

Embodiment 2

[0065] (1) Put 120ml of HYA-106 macroporous resin into the packed exchange column respectively, leaving a 3-5cm water layer on it. The condensed ring compound wastewater is first adsorbed with activated carbon with a mass fraction of 0.05% for 30 minutes, the color changes from red to light brown, and then passes through the resin layer at a flow rate of 2BV / hr (2 times the resin volume per hour), and the column feed liquid is periodically sampled and analyzed. COD and the content of phthalic acid in the feed liquid, when the COD value of the wastewater discharged from the column is higher than 3000mg / L, stop passing the column. After the resin stops treating wastewater, first use 1BV of deionized water to replace the wastewater at a rate of 1BV / hr, and then use 2BV of 10% sodium hydroxide solution to analyze the macroporous resin. The analysis temperature is 70-80°C. The flow rate of the sodium oxide solution is 1BV / hr. After the analysis is completed, the resin is washed wit...

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Abstract

The invention discloses a treatment method for fused ring compound wastewater. According to the treatment method, the fused ring compound wastewater is taken as the raw material, subjected to styrene-toluylene copolymerized macroporous resin absorption treatment, and then desorbed to recover phthalic acid, and an effluent liquid I is obtained for standby application; and the effluent liquid I is neutralized by ammonia water until the pH ranges from 7 to 8, is subjected to N-methyl glucamine amino chelate resin absorption treatment and is desorbed to recover boric acid, and an effluent liquid II is obtained for standby application; concentrated sulfuric acid is added to the effluent liquid II to regulate the pH to be 5.0-5.5 and is distilled at normal pressure to obtain ammonium sulfate. According to the disclosed treatment method for the fused ring compound wastewater, phthalic acid, boric acid and ammonium sulfate are recovered in a high yield manner sequentially through specific steps, and the method for comprehensively treating chemical wastewater is provided by means of combination of multi-stage resin technologies and physical and chemical treatment.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater, in particular to a treatment method for condensed ring compounds. Background technique [0002] In recent years, the rapid development of printing, dyeing and light textile has brought a series of environmental problems. my country is the largest country in the textile printing and dyeing industry. A large amount of chemicals and dyes are used in the printing and dyeing process, and the wastewater contains a variety of toxic and harmful substances. The discharge of printing and dyeing wastewater in my country accounts for about 35% of the entire industrial wastewater, and the reuse rate is less than 10%, and more than 90% is discharged as wastewater. Therefore, the governance of the chemical printing and dyeing industry is particularly important. [0003] Fused ring compounds are important dyes in dye chemical industry, and 2,4-dihydroxyanthraquinone is a common fused ring compoun...

Claims

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Application Information

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IPC IPC(8): C02F9/10C07C63/16C07C51/47C01B35/10C01C1/24
CPCC02F1/04C02F1/285C02F1/66C02F9/00C02F2101/308C02F2103/30C02F2301/08C07C51/47C07C63/16
Inventor 龙江李想张静施孟华
Owner ZHEJIANG QICAI ECO TECH CO LTD
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