Adsorption-evaporation integrated non-waste discharge treatment method for phloroglucine wastewater

A technology of phloroglucinol and a treatment method, which is applied in adsorption water/sewage treatment, heating water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of long process flow and high cost

Inactive Publication Date: 2009-05-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the characteristics that the phloroglucinol production wastewater contains a relatively high concentration of organic pollutants and inorganic salts, the existing process flow is long and the cost is high, the purpose of the present invention is to provide an adsorption-evaporation integrated phloroglucinol Wastewater non-waste discharge treatment method, this method can control organic poisons and inorganic salts to be discharged into the environment with wastewater through adsorption and desalination respectively, and at the same time, it can adsorb, separate, enrich and recover the main organic pollutants phloroglucinol and inorganic salt chlorine in wastewater Potassium, and the distilled water can meet the requirements of industrial water reuse, and realize the waste-free treatment of phloroglucinol production wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 20ml of composite functional resin (NDA-99) into two jacketed glass adsorption columns (Φ32×360mm), and the two columns are used in series. At room temperature (20°C), the phloroglucinol production wastewater first passes through the composite functional resin bed at a flow rate of 3BV / h, the wastewater treatment capacity is 12BV / batch, the original wastewater COD is 65000mg / L, and the phloroglucinol content is 21000mg / L, potassium chloride content is 260000mg / L, after resin adsorption, phloroglucinol content is less than 0.5mg / L.

[0023] Use 1BV of 8% NaOH aqueous solution + 4BV of water to desorb through the composite functional resin bed at 2BV / h at 60°C, and the desorption rate of phloroglucinol on the resin is >99%. The high-concentration desorption liquid obtained from resin regeneration is acidified by 30% HCl aqueous solution, and the purity of separated and recovered phloroglucinol is as high as 95%.

[0024] The above-mentioned adsorbed water is subjecte...

Embodiment 2

[0026] Put 40ml of composite functional resin (NDA-99) into two jacketed glass adsorption columns (Φ32×360mm), and the single column is used alternately. Under the condition of 10°C, the phloroglucinol production wastewater first passes through the composite functional resin bed at a flow rate of 1BV / h, the wastewater treatment capacity is 12BV / batch, the original wastewater COD is 65000mg / L, and the phloroglucinol content is 21000mg / L, potassium chloride content is 260000mg / L, after resin adsorption, phloroglucinol content is lower than 0.5mg / L.

[0027] Use 3BV 4% NaOH aqueous solution + 3BV water to desorb through the composite functional resin bed at 1BV / h at 30°C, and the desorption rate of phloroglucinol on the resin is >99%. The high-concentration desorption liquid obtained from resin regeneration is treated with 20% HCl aqueous solution for acidification treatment, and the purity of separated and recovered phloroglucinol is as high as 95%.

[0028] The above-mentione...

Embodiment 3

[0030] Put 50ml of composite functional resin (NDA-99) into two jacketed glass adsorption columns (Φ32×360mm) respectively, and the single column is used alternately. At 40°C, the phloroglucinol production wastewater first passes through the composite functional resin bed at a flow rate of 1BV / h, the wastewater treatment capacity is 10BV / batch, the original wastewater COD is 65000mg / L, and the phloroglucinol content is 21000mg / L, potassium chloride content is 260000mg / L, after resin adsorption, phloroglucinol content is lower than 0.5mg / L.

[0031] Use 5BV 2% NaOH aqueous solution + 3BV water to desorb through the composite functional resin bed at 5BV / h at 70°C, and the desorption rate of phloroglucinol on the resin is >99%. The high-concentration desorption liquid obtained from resin regeneration is treated with 30% HCl aqueous solution for acidification treatment, and the purity of separated and recovered phloroglucinol is as high as 95%.

[0032] The above-mentioned adsor...

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Abstract

The invention discloses an absorption-evaporation integrated phloroglucin wastewater waste-free emission treatment method. The filtrate of phloroglucin production wastewater, at a temperature of between 10 and 50 DEG C and with a flow rate of between 1 and 5BV/h, performs the separation, enrichment and recovery of phloroglucin in the wastewater through an adsorption column filled with a composite function resin; absorbed output water is subjected to evaporation and desalination treatment; evaporated water is colorless and transparent, of which COD can be reduced to be less than 200 mg/L and the content of the phloroglucin is lower than 0.5 mg/L, and can be recycled as process water; and more than 98 percent of potassium chloride in the process water can be recovered. The method avoids the pollution transfer and resource waste caused by the waste-free emission of poisonous pollutants and valuable inorganic salt in the phloroglucin production wastewater, recycles chemical resources while effectively reducing pollution load, and has remarkable economical value and environmental benefit.

Description

technical field [0001] The present invention relates to a method for the non-waste discharge treatment of the production wastewater of important pharmaceutical intermediates and chemical universal reagent phloroglucinol, specifically, the mother liquor and decolorization wastewater in the production process of phloroglucinol are recycled and utilized after treatment. Separation and recovery method of phloroglucinol and potassium chloride. Background technique [0002] Phloroglucinol is an important pharmaceutical intermediate and general-purpose chemical reagent, widely used in the synthesis of health care products, dye stabilizers and anti-corrosion agents for fabrics and leather, artificial rainmaking instead of silver iodide, raw materials for the production of plastic capsules, etc. The 2,6-dichlorophenol method is commonly used in domestic production. During the production process, a large amount of high-concentration organic wastewater is discharged, with a pH of about...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/28C02F1/04C02F1/42
CPCY02A20/124
Inventor 刘福强李兰娟赵卫伟杨尧朱永军盼盼龙超李爱民
Owner NANJING UNIV
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