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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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  • Abstract
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  • Claims
  • Application Information

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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 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 lower fatty acids in the waste liquid of cyclohexanone saponification, and the discharged waste water still pollutes the environment relatively large. To promote emission reduction policies, it is necessary to design and develop a recycling treatment method for cyclohexanone saponification waste liquid that can effectively recover fatty acids and other substances in cyclohexanone saponification waste liquid, which is beneficial to environmental protection.

Method used

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  • Method for disposing cyclohexanone saponified waste liquid

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Embodiment 1

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

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

[0023] (2) Get step (1) press filter liquid and carry out MVR evaporator concentration or multi-effect evaporation concentration, obtain concentrate, input in the sulfuric acid reactor, then add sulfuric acid in reactor and carry out acidification, make the concentration of sulfuric acid be 35%~ 45%, to obtain sodium sulfate solution and acidified oil, the sodium sulfate solution is concentrated and crystallized to obtain sodium sulfate solid;

[0024] (3) taking the acidified oi...

Embodiment 2

[0028] Get respectively 600 milliliters of the treatment liquid after the multi-tower rectification separation of butyric acid, hexanoic acid and valeric acid and the original cyclohexanone saponification waste liquid in Example 1, and then detect the COD value respectively. The experimental results show that after the process of the present invention, The COD value of the processed liquid is 18210 mg / L, and the COD value of the former cyclohexanone saponification waste liquid is 455290mg / L, and experimental result shows 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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