Treatment method of phenol-containing liquid waste in sebacic acid production

A treatment method and technology for phenolic wastewater, applied in biological water/sewage treatment, natural water treatment, heating water/sewage treatment, etc., can solve the problem of failure to meet discharge or reuse requirements, heavy pollution of resin regeneration, COD, and phenol content Advanced problems, achieve the effect of low cost, no solvent entrainment, and small secondary pollution

Active Publication Date: 2012-06-20
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application Nos. 95109421.1 and 200510038999.x all adopt the method of resin adsorption to process sebacic acid-containing phenolic wastewater, and most of the phenol can be recycled, but the COD and phenolic content of wastewater treated by this method are still high, and all the phenols in the wastewater Containing high concentrations of sodium sulfate without s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, a kind of sebacic acid produces the processing method of phenol-containing wastewater, and its steps are as follows:

[0025] (1) Extraction: Fully mix the phenol-containing wastewater with the extractant at a ratio of 1:1 to oil and water under normal temperature and pressure. The raffinate phase after stratification is sent to the evaporation process after extraction, and the extracted phase is the loaded extractant to be sent to the stripping process for regeneration. ; The pH value of the mixture of extractant and wastewater is 2, and the extraction stage is one level; the extractant is selected from phosphoric acid esters, alkylamines, kerosene or diesel oil;

[0026] (2) Back-extraction: Take the above-mentioned extraction phase and mix it fully with lye under normal temperature and pressure. The amount of alkali added for back-extraction is based on controlling the pH end point value at 8.5. The layered sodium phenate solution is reused for the produ...

Embodiment 2

[0031] Embodiment 2, a kind of sebacic acid produces the treatment method of phenol-containing wastewater, and its steps are as follows:

[0032] (1) Extraction: Fully mix the phenol-containing wastewater with the extractant at a ratio of 4:1 to oil and water under normal temperature and pressure. The raffinate phase after stratification is sent to the evaporation process after extraction, and the extracted phase is the loaded extractant to be sent to the stripping process for regeneration. ; The pH value of the mixture of extractant and waste water is 3, and the extraction order is one level; The extractant is selected from phosphoric acid esters, alkylamines, kerosene or diesel oil;

[0033] (2) Back-extraction: Take the above-mentioned extraction phase and fully mix it with lye under normal temperature and pressure. The amount of alkali added for back-extraction is based on controlling the pH end value at 9.5. The sodium phenate solution after stratification is reused in the...

Embodiment 3

[0038] Embodiment 3, in the step (4) of the treatment method of a kind of sebacic acid production phenol-containing wastewater described in embodiment 1 or 2, the nitrogen fertilizer is urea, ammonium chloride or ammonium sulfate; the phosphate fertilizer is phosphoric acid Potassium dihydrogen, dipotassium hydrogen phosphate or ammonium phosphate, adjust the pH value with 30% NaOH or KOH solution, or solid soda ash.

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PUM

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Abstract

The invention discloses a treatment method of phenol-containing liquid waste in sebacic acid production, specifically comprising the steps of extraction, back extraction, evaporation, regulation, anoxic biochemical reaction and aerobic biochemical reaction, and the like. The phenol-containing liquid waste is filtered to remove the insoluble substance, the phenol substance in the liquid waste is extracted by a specially selected extracting agent, the extract phase is back extracted by alkaline liquor and is regenerated to be recycled, and the back extraction solution is returned to a sebacic acid production system. The raffinate is transferred into an evaporation system to be evaporated and separated to obtain a sodium sulfate by-product, the evaporation condensed water is homogenized and equalized after being cooled, the pH value is regulated, and the evaporation condensed water is performed with anoxic biochemical reaction by acclimated and cultured microorganisms in a biochemical reaction system in the presence of nutrient elements. The method provided by the invention is a method combining materialization and biochemical reaction, and the method has the advantages of reasonabledesign and strong maneuverability; furthermore, the treated liquid waste can satisfy the discharge standard to be discharged or recycled.

Description

technical field [0001] The invention relates to a method for treating waste water from chemical product production, in particular to a method for treating phenol-containing waste water produced in the production process of sebacic acid by using a combination of physicochemical and biochemical methods. Background technique [0002] The domestic sebacic acid production method mainly adopts the benzene (methyl) phenol dilution method, and a large amount of phenol-containing wastewater is produced during production. The production of 1 ton of sebacic acid produces about 25 tons of phenol-containing wastewater, with a pH value of 2-3 and a phenol concentration of 4000- 5000mg / l, COD up to 20000mg / l, and about 7% to 8% sodium sulfate, which belongs to high-salt wastewater, which will cause serious harm to the environment if not treated. [0003] The treatment technologies for industrial phenolic wastewater mainly include chemical methods (chemical oxidation, photocatalytic oxidati...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/26C02F1/04C02F3/34C02F103/36
Inventor 董自斌王开春刘志奎李学字林浩宇刘娟
Owner BLUESTAR LEHIGH ENG INST CO LTD
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