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Treatment method of benzodioxole production wastewater

A treatment method and technology for producing waste water, applied in water/sewage treatment, natural water body treatment, heating water/sewage treatment, etc., can solve problems such as environmental pollution, high energy consumption, and bacterial death, and achieve the effect of environmental protection in production

Active Publication Date: 2022-02-25
HEBEI HAILI FRAGRANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste water cannot be directly discharged due to high COD and salt water, which will pollute the environment; and it cannot be directly treated by the existing sewage treatment system, because the COD value of the waste water before entering the sewage treatment system needs to be controlled below 1000ppm, otherwise the sewage treatment system will Bacteria in the biochemical pool will die
[0005] At present, the pepper ring brine mainly adopts the combination of distillation method and high-temperature molten sodium chloride method for brine treatment: the combination of distillation method and high-temperature molten sodium chloride method is to distill the brine, remove the excess water in the mother liquor, and the remaining mixture sodium chloride Then melt sodium chloride at a high temperature of 800°C. The 800°C melting process will produce toxic substance dioxin, which requires further catalytic combustion to treat the toxic substance, but this method consumes more energy and costs more.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The present invention has no special limitation on the preparation method of the compound medicament, and the preparation method well-known to those skilled in the art can be adopted. Specifically, the acetic acid, ferric chloride and biphenyltetracarboxylic acid can be stirred and dissolved, During this process, the iron ion will combine with biphenyltetracarboxylic acid to form an iron ion compound of biphenyltetracarboxylate.

[0040] In the present invention, the reagent used for adjusting the pH value is preferably liquid caustic soda. The present invention has no special limitation on the concentration of the liquid caustic soda, and the concentration well-known to those skilled in the art can be used. The present invention has no special limitation on the concentration and dosage of the said liquid caustic soda, and the pH value can be adjusted to 3.5~5.5. Can.

[0041] In the present invention, the pH value is preferably 4.5-5.5, more preferably 4.7-5.

[0042...

Embodiment 1

[0057] Take 1000g of pepperoni saline, the tested water content is 79.6wt%, sodium chloride content is 20.14wt%, catechol residue is 0.11wt%, catalyst concentration is 0.15wt%, COD: 8405mg / L. The temperature of the pepper ring brine was lowered to 4°C, 2.1 g of BT100 was added dropwise for 1 hour, and the addition was completed. (BT100 configuration ratio: 100g of acetic acid, 10g of ferric chloride, 35g of biphenyltetracarboxylic acid, stir and dissolve, let it stand for 24 hours, and then take the clear liquid for use).

[0058] After the BT100 dropwise addition, the pH=1.54, after adding 1.4g of 30wt% liquid caustic soda, the pH=3.7, stirred for 0.5h, after the stirring was completed, added 1.1g of water glass, pH=7.5, stirred for 0.5 hours, and then filtered, the filter cake was 13.8g, and the filtrate was 989.7g. Detect COD 1560mg / L. Add 0.1g of 30wt% hydrochloric acid to the filtrate. The pH of the filtrate water is 5.7. The residual acetic acid in the water is 0.198%. ...

Embodiment 2

[0061] Take 1000g of pepperoni saline, the tested water content is 79.6wt%, sodium chloride content is 20.14wt%, catechol residue is 0.11wt%, catalyst concentration is 0.15wt%, COD: 8405mg / L. The temperature of pepper ring brine was lowered to 4°C, 5.5g of BT100 was added dropwise for 2 hours, and the addition was completed. (BT100 configuration ratio: 100g of acetic acid, 10g of ferric chloride, 35g of biphenyltetracarboxylic acid, stir and dissolve, let it stand for 24 hours, and then take the clear liquid for use)

[0062] After adding BT100 dropwise, pH=0.84, after adding 8.4g of 30wt% liquid caustic soda, pH=4.7, stirred for 0.5h, after stirring, added 1.02g of water glass, pH=7.2 and stirred for 0.5h, then filtered, the filter cake was 17.8g, and the filtrate was 997g. COD 3660mg / L. Add 3.2g of 30wt% hydrochloric acid to the filtrate. The pH of the filtrate water is 6.1. The residual acetic acid in the water is 0.45%. Acetic acid is the main organic matter in the distil...

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PUM

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Abstract

The invention provides a treatment method of benzodioxole production wastewater, which belongs to the field of wastewater treatment. According to the method, the organic matter in the benzodioxole production wastewater is complexed with the compound medicament to form water-insoluble precipitate, the precipitate is filtered to obtain clean saline water, then the saline water is distilled and filtered to obtain sodium chloride, the main organic matter in distilled water is acetic acid, the distilled water can reach the standard and be discharged after being treated by a simple A / O process, and the method is simple and effective; the compound agent is prepared from acetic acid, ferric chloride and biphenyltetracarboxylic acid, iron ions can be combined with biphenyltetracarboxylic acid to obtain a biphenyltetracarboxylic acid iron ion compound, the biphenyltetracarboxylic acid iron ion compound and water glass can form a coordination complex compound, and the obtained sodium chloride meets the regenerated industrial salt standard. The distilled water is subjected to A / O biochemical treatment, and the discharged water can reach the emission standard of chemical synthetic pharmaceutical industry water pollutants.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating wastewater produced from pepper rings. Background technique [0002] Peppercycline, chemical name 1,2-methylenedioxybenzene, is widely used in the preparation of low-toxicity insecticides, berberine, jasmonal and sesamol, and antioxidants. The biochemical activity of pepper ring has been widely concerned by people. Due to the needs of social development, the output of pepper ring is increasing day by day, and the waste salt and water treatment generated in the production process have gradually become the focus of production. At present, the production methods of piperonyl ring mainly include: (1) using catechol and dichloromethane as raw materials, using a high-pressure reaction process to synthesize piperonyl ring; (2) using catechol and methylene chloride as raw materials, using a phase transfer catalyst Catalytic synthesis of piperonyl ring;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C01D3/06C02F1/52C02F1/54C02F103/36
CPCC02F9/00C01D3/06C02F1/5236C02F1/54C02F1/001C02F1/04C02F1/66C02F3/30C02F2103/36
Inventor 张云堂邵帅刘铁成王晶晓于玉秀王飞扬
Owner HEBEI HAILI FRAGRANCES CO LTD