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Method for recycling oxidized residual liquid

A technology of raffinate and liquid, which is applied in the field of recovery and utilization of hydrogen peroxide oxidation raffinate produced by anthraquinone method, which can solve the problems of large amount of sewage discharge and failure of hydrogen peroxide to be recycled, so as to prolong the service life and improve the comprehensive utilization efficiency and cost reduction

Active Publication Date: 2012-04-18
湖南双阳高科化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical scheme of the patent application has a large amount of sewage, and the hydrogen peroxide in the residual liquid cannot be recycled.

Method used

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  • Method for recycling oxidized residual liquid
  • Method for recycling oxidized residual liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] will be 10m 3 C 9 、C 10 The heavy aromatics extractant is added to the stainless steel Pall ring packed tower 2 from the extractant inlet 5. The height-to-diameter ratio of the packed tower is 5:1. For Ocr18Ni10Ti; the 1m 3 The oxidation raffinate in the oxidation tower 1 is discharged into the upper part of the stainless steel Pall ring packed tower 2 through the discharge pipe, and the temperature of the liquid in the tower is maintained at 48°C. Due to the specific gravity ratio C of the oxidation raffinate 9 、C 10 The specificity of heavy aromatics is large, and the oxidation raffinate gradually descends in the packed tower. At the same time, it is uniformly dispersed through the action of stainless steel Pall ring packing. , Working solution components dissolved in C 9 、C 10 In the heavy aromatics extractant, the raffinate keeps decreasing, and after 2 hours, the extract and the raffinate are completely separated, and the raffinate is discharged through the ...

Embodiment 2

[0018] will be 15m 3 C 9 、C 10 The heavy aromatics extractant is added to the stainless steel Pall ring packed tower 2 from the extractant inlet 5, and the height-to-diameter ratio of the packed tower is 4.5:1; 3 The oxidation raffinate in the oxidation tower 1 is discharged into the upper part of the stainless steel Pall ring packed tower 2 through the discharge pipe, and the temperature of the liquid in the tower is maintained at 52°C. Due to the specific gravity ratio C of the oxidation raffinate 9 and C 10 The specificity of heavy aromatics is large, and the oxidation raffinate gradually descends in the packed tower. At the same time, it is uniformly dispersed through the action of stainless steel Pall ring packing. , Working solution components dissolved in C 9 、C 10 In the heavy aromatics extractant, the raffinate keeps decreasing, and after 1.5 hours, the extract and the raffinate are completely separated, and the raffinate is discharged through the raffinate out...

Embodiment 3

[0020] will be 12m 3 C 9 and C 10 The heavy aromatics extractant is added to the stainless steel Pall ring packed tower 2 from the extractant inlet 5. The height-to-diameter ratio of the packed tower is 4:1. For Ocr18Ni10Ti; the 1m 3 The oxidation raffinate in the oxidation tower 1 is discharged into the upper part of the stainless steel Pall ring packed tower 2 through the discharge pipe, and the temperature of the liquid in the tower is maintained at 50°C. Due to the specific gravity ratio C of the oxidation raffinate 9 and C 10 The specificity of heavy aromatics is large, and the oxidation raffinate gradually descends in the packed tower. At the same time, it is uniformly dispersed through the action of stainless steel Pall ring packing. 1. The components of the working solution are dissolved in the extractant, and the raffinate continues to drop. After 1 hour, the extract and the raffinate are completely separated, and the raffinate is discharged through the raffinat...

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Abstract

The invention discloses a method for recycling oxidized residual liquid, which comprises the following steps of: filling heavy aromatic mixed extracting agent of C9 and C10 into a stainless steel pall ring filler tower of an intermittent extraction device; discharging the oxidized residual liquid to the upper part of the extracting agent filled in the filler tower through a discharge pipe, and extracting the oxidized residual liquid at the temperature of between 48 and 52 DEG C after a filler is dispersed; and after the extracted residual liquid is discharged from the bottom of the filler tower, rectifying the extracted liquid for recycling. The method can reclaim hydrogen peroxide and phosphoric acid carried in the oxidized residual liquid so as to improve the comprehensive utilization rate of resources, reduce the blowout loss of materials during production and protect the environment.

Description

technical field [0001] The invention relates to a method for recycling waste liquid discharged from the chemical industry, in particular to a method for recycling and utilizing the residual liquid of hydrogen peroxide oxidation produced by an anthraquinone method. Background technique [0002] At present, the anthraquinone method of the palladium catalyst fixed-bed hydrogenation process is the main hydrogen peroxide production method. In the production process of hydrogen peroxide produced by the anthraquinone method, due to the air-saturated water and phosphoric acid aqueous solution entering the oxidation tower, the hydrogen peroxide produced in the tower will be oxidized. The hydrogen peroxide extracted is the oxidation raffinate, which has low stability due to the high content of various impurities. 2 o 2 The content is high and it is easy to decompose, so it needs to be discharged from the system in time to prevent safety accidents and affect the extraction and product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B15/023
Inventor 刘光昌黄丰杨云强郑红伟
Owner 湖南双阳高科化工有限公司
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