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Treatment for wastewater of technique for producing spaston and cyclic utilization method for recycled organic matter

A technology of phloroglucinol and production process, which is applied in the field of treatment of phloroglucinol production process wastewater and the recycling of organic matter, which can solve the problem of high treatment costs, waste of phloroglucinol, and process wastewater that is not economical and effective. The treatment methods and other issues, to achieve the effect of saving costs, reducing pollution, and improving the effect of treatment

Inactive Publication Date: 2008-08-20
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current treatment method is mainly to concentrate the process wastewater and treat it as hazardous solid waste. Not only the treatment cost is high, but also the expensive phloroglucinol is wasted.
According to domestic and foreign literature search, there is no economical and effective treatment method for the process wastewater.

Method used

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  • Treatment for wastewater of technique for producing spaston and cyclic utilization method for recycled organic matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Take 40mL (about 30g, dry weight) of ZH-01 resin and fill it equally into two adsorption columns with insulation jackets (Φ20×250mm).

[0019] 2. Take 400mL dark reddish-brown phloroglucinol production process wastewater and filter to remove large particles of impurities, then add 1ml of 1% hydrochloric acid dropwise, pH is 2.5, and the column liquid COD Cr The content of phloroglucinol is 9670mg / L, and the content of phloroglucinol is 4760mg / L; at room temperature (25°C), 400ml of upper column liquid is passed through two ZH-01 adsorption columns in sequence at a flow rate of 40mL / h, and the secondary adsorption water is colorless , Phloroglucinol is 3.6mg / L, COD Cr Reduced to 440mg / L, pH 3.6;

[0020] 3. Use 40mL of 6% KOH solution to desorb and regenerate the ZH-01 adsorption column with phloroglucinol at a temperature of 40±5°C, with a flow rate of 20mL / h. The adsorption column regenerated by desorption was washed with 10 ml of 1% hydrochloric acid solution and...

Embodiment 2

[0023] 1. Take 600mL (about 450g, dry weight) of NDA150 resin and load it equally into three adsorption columns with insulation jackets (Φ35×500mm).

[0024] 2. Take 4L of deep reddish-brown process wastewater in the production of phloroglucinol and filter to remove large particles of impurities, add 10ml of 2% hydrochloric acid dropwise, and put the column solution COD Cr phloroglucinol content is 9320mg / L, pH is 2.8, and phloroglucinol content is 4570mg / L; at room temperature (25°C), 4L of upper column liquid is passed through the first and second NDA150 adsorption columns successively at a flow rate of 300mL / h, and the second Grade adsorption water is colorless, phloroglucinol is 2.4mg / L, COD Cr Reduced to 480mg / L, pH 3.6;

[0025] 3. Use 400mL of 8% KOH solution to desorb and regenerate the first NDA150 adsorption column that is adsorbed with phloroglucinol and is nearly saturated at a temperature of 45±5°C, with a flow rate of 100mL / h. The first adsorption column regene...

Embodiment 3

[0033] Repeat steps 1-8 of Example 2.

[0034] Combine the desorption liquids in the above steps 3, 5, and 7, and directly put them into the hydrochloric acid acidification step of the phloroglucinol production process as a raw material, and prepare phloroglucinol together. Tests have shown that it does not affect the product quality of phloroglucinol.

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Abstract

The invention provides a method of treating the phloroglucinol producing wastewater and the recycle utilization of the recovery organic compounds. The wastewater of the phloroglucinol producing with 2, 6-dichlorophenol and excess KOH as material is adjusted by hydrochloric acid to pH less than 3 before adsorbed by high-crosslinked adsorption resin. The secondary effluent water of adsorption is adjusted to be neutral by KOH before distilled. The KCl is recovered after the cooling crystallization and the centrifugal of the residue. The distilled effluent returns to the former manufacturing process to be indiscriminate used or biochemical treated by aerobic and discharges in standard. The distilled mother liquor merges into other batch of secondary effluent water of adsorption. The resin adsorbing the phloroglucinol is desorbed by KOH. The desorption liquid is applied in the hydrochloric acid acidization step of the former manufacturing process or hydrochloric acid is adopted directly to neutralize to be neutral before centrifugal separation to get phloroglucinol. By adopting the method, phloroglucinol and KCl can be recovered while the wastewater is treated. The pollution is reduced and the cost is saved. The organic combination of wastewater treatment and resource recovery as well as recycle utilization is realized.

Description

technical field [0001] The invention relates to a treatment method for waste water in the production process of phloroglucinol, specifically, the acidification waste water and washing waste water in the production process of phloroglucinol are synthesized by using 2,6-dichlorophenol and excess potassium hydroxide as raw materials The treatment and the recycling method of recovering organic matter, so that the organic matter phloroglucinol in the process wastewater can be recycled, and at the same time realize the purification and reuse of waste water or discharge up to the standard, and finally realize the treatment of phloroglucinol production process waste water and its resources change. Background technique [0002] At present, the production process of phloroglucinol is usually as follows: 2,6-dichlorophenol and excess potassium hydroxide are used as starting materials, and a small amount of trimethylbenzene is used as a catalyst. The potassium salt of phloroglucinol wa...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F9/14C02F1/42C02F1/58C02F3/02C01D3/04C02F103/36
CPCY02W10/10
Inventor 费正皓张根成董庆华唐伯平周春霖刘总堂张华彬张代臻李振兴李万新
Owner YANCHENG TEACHERS UNIV
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