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Treatment method of heliotropin production wastewater

A technology for production wastewater and treatment method, applied in energy wastewater treatment, natural water treatment, water/sewage multi-stage treatment, etc., can solve the problems of unrecoverable piperonal products, secondary pollution, etc., to enhance removal effect and simplify treatment Craftsmanship, the effect of high practical value

Active Publication Date: 2022-05-13
HEBEI HAILI FRAGRANCES CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing method for treating waste water from piperonal production cannot recycle the reaction raw materials and piperonal products, and will cause secondary pollution, the present invention provides a treatment method for waste water from piperonal production, which mainly uses piperonal Add 1,2-methylenedioxybenzene to the production wastewater to form an azeotropic system, recover the piperonal in the wastewater, and add a catalyst to the wastewater after the recovery of piperonal for high-voltage pulse treatment, so that the wastewater can meet the discharge standard, which not only realizes It ensures the effective recovery of raw materials and products in wastewater, and will not cause secondary pollution, and has high economic and environmental benefits

Method used

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Effect test

Embodiment 1

[0036] The present embodiment provides a kind of treatment method of piperonal production waste water, comprises the steps:

[0037] Step a, take 1000g of piperonal production waste water and add it to the still, add 10g of 1,2-methylenedioxybenzene, carry out distillation under normal pressure at 101°C under stirring conditions, collect 54.3g of fractions, stop the distillation, and separate the fractions into liquids , to obtain 13.8g of the oil phase, detected by high performance liquid chromatography, the piperonyl ring content was 79.7%, the piperonal content was 15.4%, and the intermediate content was 3.6%;

[0038] Step b, reduce the remaining mother liquor from distillation to room temperature, adjust the pH to 4.2 with 30wt% hydrochloric acid, add 1g of nano-titanium dioxide powder with a particle size of 20nm, and then perform high-voltage pulse treatment. The discharge voltage of the high-voltage pulse is 650V, and the frequency is 6000Hz. The ratio is 35%, the pH o...

Embodiment 2

[0042] The present embodiment provides a kind of treatment method of piperonal production waste water, comprises the steps:

[0043]Step a, take 1000g of piperonal production waste water and add it to the still, add 20g of 1,2-methylenedioxybenzene, carry out distillation under normal pressure at 102°C under stirring conditions, collect 98.5g of fractions, stop the distillation, and separate the fractions into liquids , to obtain 23.6g of the oil phase, detected by high performance liquid chromatography, the piperonyl ring content was 88.1%, the piperonal content was 9.3%, and the intermediate content was 2.1%;

[0044] Step b, reduce the remaining mother liquor from distillation to room temperature, adjust the pH to 4.9 with 30wt% hydrochloric acid, add 1g of nano-titanium dioxide powder with a particle size of 10nm, and then perform high-voltage pulse treatment. The discharge voltage of the high-voltage pulse is 900V, and the frequency is 5000Hz. The ratio is 25%, the pH of ...

Embodiment 3

[0048] The present embodiment provides a kind of treatment method of piperonal production waste water, comprises the steps:

[0049] In step a, take 1000 g of piperonal production wastewater and add it to the distillation still, add 15 g of 1,2-methylenedioxybenzene, and carry out distillation under normal pressure at 103°C under stirring conditions, collect 85 g of fractions, stop the distillation, and separate the fractions into liquids, 18.7g of the oil phase was obtained, and the content of piperonylcycline was 85.7%, the content of piperonal was 11.6%, and the content of intermediates was 2.5% through HPLC detection;

[0050] In step b, lower the remaining mother liquor from distillation to room temperature, adjust the pH to 4.1 with 30wt% hydrochloric acid, add 0.6g of nano-titanium dioxide powder with a particle size of 10nm, and then perform high-voltage pulse treatment. The discharge voltage of the high-voltage pulse is 800V, and the frequency is 8000Hz. The empty rat...

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Abstract

The invention relates to the technical field of industrial wastewater treatment, and particularly discloses a heliotropin production wastewater treatment method. The heliotropin production wastewater treatment method comprises the following steps: adding 1, 2-methylenedioxybenzene into heliotropin production wastewater, uniformly mixing, distilling, collecting fractions, and separating liquid to obtain a recycled material; and cooling the remaining mother liquor after distillation, adjusting the pH value to weak acidity, adding a transition metal oxide, carrying out high-pressure pulse treatment, filtering, treating the treated water through a sewage treatment system, and discharging the treated water. The heliotropin production wastewater treatment method provided by the invention is simple in process operation and low in energy consumption, the problem that reaction raw materials and reaction products in wastewater cannot be recycled by a traditional treatment process is solved, the treated wastewater can reach the emission standard of Chemical Synthesis Pharmaceutical Industry Water Pollutant Discharge Standard, secondary pollution is not caused, and the method is suitable for industrial production. The comprehensive treatment and resource utilization of the wastewater are realized, the economic benefit and the environmental benefit are relatively high, and the popularization value is extremely high.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment method for piperonal production wastewater. Background technique [0002] Piperonal, chemical name is 3,4-methylenedioxybenzaldehyde, molecular formula is C 8 h 6 o 3 , white to light yellow crystals, soluble in general organic solvents, insoluble in water and glycerin, melting point is 35~37°C, boiling point is 261~263°C. Piperonal not only has a sweet heliotrope aroma, but also has a light and slightly sweet cherry and sunflower aroma, and also has a faint spicy aroma, which lasts for a long time. The deployment of flavors. [0003] Piperonal is prepared from 1,2-methylenedioxybenzene (piperone) through acidification and catalytic oxidation. During the catalytic oxidation process, waste water containing benzene rings will be produced. The production of 1 ton of piperonal will produce 1 to 1.5 tons of waste water. The production waste wat...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F103/36
CPCC02F9/00C02F1/04C02F1/001C02F1/66C02F2101/30C02F3/30C02F2103/36Y02W10/37
Inventor 张云堂邵帅朱玉梅王飞扬王晶晓邢孟平
Owner HEBEI HAILI FRAGRANCES CO LTD
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