A recovery and treatment method for high-concentration organic acid wastewater
A technology for recovery and treatment of organic acids, applied in the direction of extraction water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of limited application range and difficulty in effectively treating wastewater with chemical structure organic acids, etc. The operation method is simple, the secondary pollution problem is eliminated, and the cost is reduced.
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Embodiment 1
[0025] In this embodiment, a method for recycling high-concentration organic acid wastewater is provided. The pivaloyl chloride production workshop of a pharmaceutical factory in Zhejiang is hereinafter referred to as pivaloyl chloride wastewater. The raw water quality: pH=3, COD: 41035mg / L , Pivalic acid concentration: 13855mg / L, pungent odor.
[0026] The method specifically includes the following steps.
[0027] Step S10. Complex extraction: First, in this embodiment, trioctyl phosphine oxide is used as the extractant, and aviation kerosene is used as the diluent, and the volume ratio of the trioctyl phosphine oxide to the aviation kerosene is 1: 4. After the two are mixed uniformly, the complex extraction agent is obtained. Take 3L of the pivaloyl chloride wastewater, add 600mL of the above-mentioned complex extractant, mix and react for 30 minutes, then stand still and separate to obtain an extract phase and an aqueous phase. The extraction phase is sent to the extractant re...
Embodiment 2
[0031] In this embodiment, a method for removing aniline substances from high-concentration organic acid wastewater is provided, and the treatment object is taken from (R)-(+)-2-(4-hydroxyphenoxy)propane from Shandong Pesticide Factory Methyl acid methyl ester production workshop, hereinafter referred to as (R)-(+)-2-(4-hydroxyphenoxy) methyl propionate wastewater, raw water quality: pH=7, COD: 24490mg / L, (R)- (+)-2-(4-Hydroxyphenoxy)propionic acid concentration: 6704mg / L.
[0032] The method specifically includes the following steps.
[0033] Step S10. Complex extraction: First, in this embodiment, N-laurel (trialkylmethyl)amine is used as the extractant and diesel oil is used as the diluent. The volume ratio with the diesel is 24:76, and the complex extractant is obtained after the two are evenly mixed. Take 3L of the wastewater of (R)-(+)-2-(4-hydroxyphenoxy) methyl propionate, adjust its pH value between 3 and 5, add 500mL of the above complex extraction agent, mix and react ...
Embodiment 3
[0037] In this embodiment, a method for removing aniline substances from high-concentration organic acid wastewater is provided. The treatment object is taken from the bifenthrin production workshop of a pesticide factory in Jiangsu, which is hereinafter referred to as bifenthrin wastewater and raw water quality : PH=3, COD: 49606mg / L, Kungfu acid concentration: 10399mg / L, pungent smell.
[0038] The method specifically includes the following steps.
[0039] Step S10. Complex extraction: First, in this embodiment, trioctyl phosphine oxide is used as the extractant, and aviation kerosene is used as the diluent. The volume ratio of the trioctyl phosphine oxide to aviation kerosene is 48:52. After the mixture is uniform, the complex extraction agent is obtained. Take 3L of the bifenthrin wastewater, add 600mL of the above-mentioned complex extractant, mix and react for 45 minutes, then stand still and separate to obtain an extract phase and an aqueous phase. The extraction phase is ...
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Abstract
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