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A kind of recovery and purification process of alkaline magenta mother liquor

A mother liquor recovery and process technology, applied in organic dyes, chemical instruments and methods, diaryl/triaryl methane dyes, etc., can solve the problems of long production process, environmental hazards, and high pollutant discharge, and achieve efficient purification , Efficient recycling effect

Active Publication Date: 2019-11-19
河北瑞鑫化工有限公司
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] The production process of alkaline magenta green is long and the discharge of pollutants in the production process is large, which causes great harm to the environment. Therefore, recycling the alkaline magenta green mother liquor in the printing and dyeing industry is a method of recycling alkaline magenta green. But at present there is no effective method to efficiently recover the alkaline magenta in the magenta mother liquor

Method used

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  • A kind of recovery and purification process of alkaline magenta mother liquor

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one: the process of recovering and purifying the mother liquor of alkaline magenta comprises the following steps:

[0029] S1. Adjustment process:

[0030] Add a certain amount of water to the alkaline magenta mother liquor to make the mass concentration of alkaline magenta reach 55% to 65%, stir under the condition of aeration, after stirring for 10 minutes, stop the aeration and stirring, and adjust the temperature to 25 ℃, continue to stir, and slowly add liquid caustic soda, so that the pH value of the solution reaches 2-3, stop stirring after the chroma reaches 15%;

[0031] S2, neutralization process:

[0032] Slowly add liquid caustic soda to the solution obtained in S1 while stirring, so that the pH value of the solution reaches 4 to 5, and the color of the solution is light purple, stop stirring, and obtain the neutralized mother liquor;

[0033] S3, color base preparation process:

[0034] Add liquid caustic soda to the neutralized mother liquor ...

Embodiment 2

[0042] The difference from Example 1 is that in S1, when the chromaticity reaches 15% and remains unchanged for 1 hour, the stirring is stopped. If the color changes within 1 hour, liquid caustic soda is added dropwise to adjust until the chromaticity remains constant for 1 hour. Change.

Embodiment 3

[0044] The difference from Example 1 is that the stirring is stopped after the color of the solution in S2 remains unchanged for 20 minutes, and if the color changes within 20 minutes, liquid caustic soda is added dropwise to adjust.

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Abstract

The invention belongs to the technical field of basic brilliant green recovery, and provides a basic brilliant green mother liquid recovery and purification technology which includes a value adjustingtechnology, a neutralizing technology, a color base preparation technology, an extracting technology and an acid-leaching technology for crystallization and drying. Basic brilliant green in brilliantgreen mother liquid can be efficiently recovered by an effective method, and the technical problem of difficulty in recovery of existing basic brilliant green mother liquid is solved.

Description

technical field [0001] The invention belongs to the technical field of alkaline magenta recovery and relates to a process for recovering and purifying alkaline magenta mother liquor. Background technique [0002] The production process of alkaline magenta green is long and the discharge of pollutants in the production process is large, which causes great harm to the environment. Therefore, recycling the alkaline magenta green mother liquor in the printing and dyeing industry is a method of recycling alkaline magenta green. But at present there is no effective method to efficiently recover the alkaline magenta in the magenta mother liquor. Contents of the invention [0003] The invention proposes a process for recovering and purifying alkaline magenta mother liquor, which solves the above-mentioned technical problems. [0004] Technical scheme of the present invention is realized like this: [0005] A recovery and purification process for alkaline magenta mother liquor, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B11/12C09B67/54
CPCC09B11/12C09B67/0096
Inventor 刘瑞明
Owner 河北瑞鑫化工有限公司
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