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Treatment method of aluminum trichloride wastewater

A technology of aluminum trichloride and treatment methods, applied in the direction of aluminum chloride, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of extraction removal, non-removal, and considerable content, and achieve economical treatment methods and easy operation Effect

Pending Publication Date: 2021-08-13
JIANGSU YANGNONG CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unreacted acetyl chloride or acetic anhydride, the aluminum trichloride wastewater will contain a considerable concentration of acetic acid. As a water-miscible substance, acetic acid is difficult to remove by simple extraction with common organic solvents, and the boiling point of acetic acid is higher than Water, does not azeotrope with water, nor can it be removed by rectification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A treatment method for aluminum chloride waste water, comprising the following steps:

[0036] (1) 1000kg of aluminum trichloride waste water (containing 1.0% acetic acid) with a mass concentration of about 20% produced by the production of 2-chloro-4-(4-chlorophenoxy)acetophenone is put into an extraction kettle and opened After stirring, 500 kg of solvent chloroform was added for extraction. After stirring and extracting for 30 minutes, let it stand still, and remove the lower chloroform layer to obtain wastewater after the first extraction.

[0037] Put the waste water after the first extraction into the secondary extraction kettle, add 500kg of n-butanol for extraction, after phase separation, add 500kg of n-butanol again for extraction, and separate the phases to obtain the waste water after the second extraction. After analysis, it contains acetic acid 0.2%. The separated n-butanol extract is separately processed to separate acetic acid and used for the next bat...

Embodiment 2

[0043] A treatment method for aluminum chloride waste water, comprising the following steps:

[0044] (1) 1000kg of aluminum trichloride waste water (containing 1.0% acetic acid) with a mass concentration of about 20% produced by the production of 2-chloro-4-(4-chlorophenoxy)acetophenone is put into the extraction tank, and the stirring is started , Then add 300kg toluene to extract. After stirring and extracting for 30 minutes, let it stand still, and separate the lower aqueous phase to obtain the waste water after the first extraction.

[0045]Put the wastewater after the first extraction into the secondary extraction kettle, add 500kg of isobutanol for extraction, and then add 500kg of isobutanol for extraction after phase separation, and obtain the wastewater after the second extraction. After analysis, it contains acetic acid 0.15%. The separated isobutanol extract is separately processed to separate acetic acid and applied to the next batch of extractions.

[0046] (2...

Embodiment 3

[0051] A treatment method for aluminum chloride waste water, comprising the following steps:

[0052] (1) 1000kg of aluminum trichloride waste water (containing 1.0% acetic acid) with a mass concentration of about 20% produced by the production of 2-chloro-4-(4-chlorophenoxy)acetophenone is put into the extraction tank, and the stirring is started , Then add solvent ethyl acetate 300kg, carry out extraction. After stirring and extracting for 30 minutes, let it stand still, and separate the lower aqueous phase to obtain the wastewater after the first extraction.

[0053] The waste water after the first extraction enters from the upper part of the extraction tower, and the isoamyl alcohol enters from the lower part of the extraction tower, and the countercurrent extraction operation is carried out according to a certain ratio, and the waste water after the second extraction is obtained from the lower part of the tower. After analysis, it contains 0.08% acetic acid; The isoamyl ...

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Abstract

The invention discloses a treatment method of aluminum trichloride wastewater, which comprises the following steps: adding a solvent A into the aluminum trichloride wastewater generated in the production process of 2-chloro-4-(4-chlorophenoxy)acetophenone for first extraction, and removing a solvent layer to obtain a first extraction solution; adding a solvent B into the first extraction solution for second extraction, and obtaining a second extraction liquid after a solvent layer is removed; rectifying and separating out a small amount of fatty alcohol contained in the secondary extracting liquid, and then conducting evaporating, dehydrating and concentrating to obtain a concentrated solution; adding an alkaline substance into the concentrated solution in a stirring state to obtain a neutralized solution; raising the temperature of the neutralized solution to 30-150 DEG C, preserving heat for 1-48 hours, and then reducing the temperature to -10 DEGC to 40 DEG C to obtain a cured solution; and filtering the cured solution, wherein the filtrate is a polyaluminum chloride flocculant. The treatment method of the aluminum trichloride wastewater provided by the invention is economical and simple and convenient to operate, and the aluminum trichloride wastewater can finally become a high-quality polyaluminum chloride flocculant.

Description

technical field [0001] The present invention relates to a kind of processing method of aluminum trichloride wastewater, in particular to a kind of processing method of aluminum trichloride wastewater produced in the production process of 2-chloro-4-(4-chlorophenoxy)acetophenone, It belongs to the technical field of chemical production. Background technique [0002] Aluminum trichloride wastewater, a current industrial treatment method is to prepare it into polyaluminum chloride (flocculant), which is used for the purification of urban sewage or industrial wastewater. Polyaluminum chloride flocculant has two forms, solid and liquid. If it is prepared in solid form, it is convenient for transportation and storage and has a long shelf life, but it needs corresponding dehydration and drying equipment, which requires high investment in equipment, and the energy cost of dehydration and drying is also high. It is very high, and a large amount of acid waste water needs to be furthe...

Claims

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Application Information

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IPC IPC(8): C02F1/52C01F7/58C01G49/10
CPCC02F1/5236C01F7/58C01G49/10
Inventor 吴孝举王宝林李纪平王兴垚李安明罗成燕
Owner JIANGSU YANGNONG CHEM
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