Wastewater treatment process and device of sulfonic dye and dye intermediate

A technology for dye intermediates and waste water treatment, which is applied in neutralizing water/sewage treatment, water/sewage treatment, heating water/sewage treatment, etc. It can solve problems such as high salt content and high concentration of organic matter in waste water, and improve the recovery rate , the effect of saving investment

Inactive Publication Date: 2016-07-27
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a comprehensive treatment method for sulfonic acid dyes and dye intermediates, which solves the problems of high concentration of organic matter and high salt content in wastewater, and the water quality indicators of wastewater after treatment meet the influent indicators of sewage treatment plants

Method used

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  • Wastewater treatment process and device of sulfonic dye and dye intermediate
  • Wastewater treatment process and device of sulfonic dye and dye intermediate
  • Wastewater treatment process and device of sulfonic dye and dye intermediate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 100L of sulfonic acid dye intermediate waste water was added with medium flocculant polyaluminum chloride (PAC) and polyacrylamide (PAM), the amount of PAC added was 1500ppm, the amount of PAM added was 30ppm, coagulated and settled for 0.5h to filter, and the effluent COD was 48370mg / L, the filtered clear liquid is adjusted to pH 2 with sulfuric acid, and then enters the heavy phase inlet of the centrifugal extractor, and the light phase inlet enters the extractant, which is composed of 20% N235, 70% kerosene and 10% isotetradecyl alcohol by volume , control the oil-water flow ratio of the centrifugal extractor to 8:1, adopt the three-stage countercurrent extraction method, the extracted oil phase enters the subsequent centrifugal stripping unit, the stripping agent is 10% hydroxide solution, and the COD of the extracted water phase is 15630mg / L, Enter the ceramic ultrafiltration membrane for filtration treatment, the average pore size of the membrane is 50nm, and filt...

Embodiment 2

[0047] 100L of sulfonic acid dye intermediate waste water was added with medium flocculant polyaluminum chloride (PAC) and polyacrylamide (PAM), the amount of PAC added was 1500ppm, the amount of PAM added was 30ppm, coagulated and settled for 0.5h to filter, and the effluent COD was 48370mg / L, the filtered clear liquid is adjusted to pH 2 with sulfuric acid, and then enters the heavy phase inlet of the centrifugal extractor, and the light phase inlet enters the extractant, which is composed of 20% N235, 70% kerosene and 10% isotetradecyl alcohol by volume , control the oil-water flow ratio of the centrifugal extractor to 8:1, adopt the three-stage countercurrent extraction method, the extracted oil phase enters the subsequent centrifugal stripping unit, the stripping agent is 10% hydroxide solution, and the COD of the extracted water phase is 15630mg / L, Enter the ceramic ultrafiltration membrane for filtration treatment. The average pore size of the membrane is 20nm. Filtrati...

Embodiment 3

[0050] 100L of sulfonic acid dye intermediate waste water was added with coagulants polyaluminum chloride (PAC) and polyacrylamide (PAM), the amount of PAC added was 2000ppm, the amount of PAM added was 100ppm, coagulated and settled for 0.5h to filter, and the effluent COD was 48370mg / L, the filtered clear liquid is adjusted to pH 1 with sulfuric acid, and then enters the heavy phase inlet of the centrifugal extractor, and the light phase inlet enters the extractant, which is composed of 15% N235, 75% kerosene and 10% isotetradecyl alcohol by volume , control the oil-water flow ratio of the centrifugal extractor to 8:1, adopt the three-stage countercurrent extraction method, the extracted oil phase enters the subsequent centrifugal stripping unit, the stripping agent is 10% hydroxide solution, and the COD of the extracted water phase is 14960mg / L, Enter the ceramic ultrafiltration membrane for filtration treatment. Ceramic membranes with different average pore diameters are u...

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Abstract

The invention relates to a wastewater treatment process and a device of a sulfonic dye and a dye intermediate. The process comprises the following steps: separating wastewater produced by the sulfonic dye and a sulfonyl-containing intermediate by using an extraction method to obtain an organic phase and an aqueous phase; oxidizing and/or ultrafiltrating the aqueous phase, and concentrating and crystallizing to obtain sodium sulfate. Through the technology, the problems that the wastewater from sulfonic dye and the dye intermediate has high concentration of organic matter and high salinity are solved, and the water quality index meets the inflow index of entering a sewage treatment plant after the wastewater is treated.

Description

technical field [0001] The invention belongs to the technical field of dye chemical production wastewater treatment, and in particular relates to the comprehensive treatment of sulfonic acid dye intermediate wastewater. Background technique [0002] There are many kinds of sulfonic acid dyes and dye intermediates, among which sulfonic acid dye intermediates are important raw materials for the production of reactive dyes and acid dyes. Due to the complex reaction, many side reactions, and low conversion rate in the production process, production wastewater with complex components and high concentration is often produced, and due to the existence of salting-out process in dye intermediates, the salt content of dye intermediate wastewater is relatively high . This type of wastewater with high salt and high concentration has poor biodegradability and is difficult to treat. [0003] Chinese patent CN1309092A discloses a method for complex extraction of wastewater pretreatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F9/00C02F1/04C02F1/26C02F1/30C02F1/444C02F1/4672C02F1/5236C02F1/5245C02F1/56C02F1/66C02F1/72C02F1/722C02F1/725C02F1/78C02F2101/308
Inventor 杨积衡李焕霞叶圣武彭文博孙桂花邓唯范克银
Owner JIANGSU JIUWU HITECH
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