Method for disposing cyclohexanone saponified waste liquid

A technology for waste liquid treatment and cyclohexanone, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve problems such as non-recyclable treatment, large environmental pollution, and environmental pollution , achieving significant economic benefits, less energy consumption, and pollution control effects

Inactive Publication Date: 2013-02-13
江苏迈克化工机械有限公司
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Problems solved by technology

[0002] During the preparation process of cyclohexanone, a large amount of saponification waste liquid is produced. The saponification waste liquid contains a large amount of organic acid salts, some organic bases and other pollutants. Direct discharge will cause serious environmental pollution. The current cyclohexanone saponification waste liquid simply uses heat Concentration treatment can reduce the CODcr in wastewater, but it cannot recycle the substances in wastewater. Wastewater still contains a lot of organic acid salts. Direct discharge not only pollutes the environment, but also produces a lot of waste of re

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  • Method for disposing cyclohexanone saponified waste liquid

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Example Embodiment

[0020] Example 1

[0021] A cyclohexanone saponification waste liquid treatment method, the reaction process is as follows figure 1 As shown, it includes the following steps:

[0022] (1) First, pass carbon dioxide gas into the waste liquid of cyclohexanone saponification. After the reaction, the waste liquid is input to a filter press to obtain a solid sodium bicarbonate and a filtrate; the temperature of the reaction is 250- 300°C, the reaction pressure is 5-6 atmospheres.

[0023] (2) Take the step (1) press filtrate for MVR evaporator concentration or multi-effect evaporation concentration to obtain the concentrated solution, input it into the sulfuric acid reactor, and then add sulfuric acid to the reactor for acidification, so that the concentration of sulfuric acid is 35%~ 45%, to obtain sodium sulfate solution and acidified oil, concentrate the sodium sulfate solution to crystallize to obtain sodium sulfate solid;

[0024] (3) Take the acidified oil obtained in step (2) an...

Example Embodiment

[0027] Example 2

[0028] Take 600 ml each of the treated liquid after the multi-column rectification separation of butyric acid, caproic acid, and valeric acid and the original cyclohexanone saponification waste liquid of Example 1 respectively, and then detect the COD value. The experimental results show that the treatment method of the present invention The COD value of the treated liquid is 18210 mg / L, and the COD value of the original cyclohexanone saponification waste liquid is 455290 mg / L. The experimental results show that the COD removal rate of the cyclohexanone saponification waste liquid treatment method provided by the present invention is 96.1% , Can effectively treat saponification liquid wastewater, and has important social and economic effects.

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Abstract

The invention discloses a method for disposing cyclohexanone saponified waste liquid. According to the variety and property of organic acid, organic alkali and other pollutants, the method includes: firstly obtaining sodium bicarbonate through carbon dioxide alkalization treatment, concentrating the cyclohexanone saponified waste liquid through an optimized concentration method, adding sulfuric acid with the optimized concentration and quantity to acidize the cyclohexanone saponified waste liquid to obtain sodium sulfate and acid oil, and performing coarse distillation and rectification with optimized process on the acid oil to obtain butyric acid, caproic acid and valeric acid. By means of the method, waste can be changed into valuable, the pollution to the environment caused by the cyclohexanone saponified waste liquid can be thoroughly managed, resources can be reused, and the method has very important meaning for environment protection.

Description

technical field [0001] The invention relates to a treatment method for waste liquid, in particular to a recycling treatment method for cyclohexanone saponification waste liquid. Background technique [0002] During the preparation process of cyclohexanone, a large amount of saponification waste liquid is produced. The saponification waste liquid contains a large amount of organic acid salts, some organic bases and other pollutants. Direct discharge will cause serious environmental pollution. The current cyclohexanone saponification waste liquid simply uses heat Concentration treatment can reduce the CODcr in wastewater, but it cannot recycle the substances in wastewater. Wastewater still contains a lot of organic acid salts. Direct discharge not only pollutes the environment, but also produces a lot of waste of resources. Chinese patent 201010248629.X Disclosed is a method for treating waste lye of cyclohexanone saponification, but this method fails to recycle and treat the ...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D5/02C01D7/12C07C51/44C07C53/124C07C53/126
Inventor 曾锡华
Owner 江苏迈克化工机械有限公司
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