Method for producing decoloring material of printing and dyeing waste water

A manufacturing method, printing and dyeing wastewater technology, applied in the direction of adsorption water/sewage treatment, ion exchange water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of easy mining, fine natural particle size, and excellent chemical comprehensive decolorization ability

Inactive Publication Date: 2006-11-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But using Hangjin 2# soil to produce high-efficiency printing and dyeing wastewater particle decolorization materials has not been reported yet

Method used

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  • Method for producing decoloring material of printing and dyeing waste water

Examples

Experimental program
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Effect test

example 1

[0018] Hangjin 2# clay 100kg, coarsely crushed to more than 80 mesh, mixed with H at a concentration of 1.0mol / L 2 SO 4 Use a solid-liquid ratio of 1:3, activate at 95°C for 2 hours, then neutralize with 5mol / L NaOH to a pH value of about 7.5, separate the solid and liquid once, granulate into 3-5mm pellets, dry at 90°C, and then After calcining at 750°C for 3 hours, 85kg of printing and dyeing wastewater decolorization materials can be obtained. The produced filtrate is evaporated and concentrated, crystallized and separated to obtain Na 2 SO 4 10H 2 The O by-product is about 70kg, and the mother liquor is recycled. The particle strength of the decolorizing material and its decolorizing effect on a single pure dye with different properties and actual printing and dyeing wastewater are shown in Table 1.

example 2

[0020] Hangjin 2# clay 100kg, coarsely crushed to more than 80 mesh, mixed with H at a concentration of 1.5mol / L 2 SO 4 Use a solid-liquid ratio of 1:2.5, activate at 95°C for 2 hours, then neutralize with 5mol / L NaOH to a pH value of about 7.5, separate solid-liquid once, granulate into 3-5mm pellets, dry at 90°C, and then After calcining at 750°C for 3 hours, 90kg of printing and dyeing wastewater decolorization materials can be obtained. The produced filtrate is evaporated and concentrated, crystallized and separated to obtain Na 2 SO 4 10H 2 O by-product about 80kg, mother liquor recycling. The particle strength of the decolorizing material and its decolorizing effect on a single pure dye with different properties and actual printing and dyeing wastewater are shown in Table 1.

example 3

[0022] 100kg of Hangjin 2# clay, coarsely crushed to above 40 mesh, mixed with H at a concentration of 2.0mol / L 2 SO 4 Mix with a solid-liquid ratio of 1:2.0, activate at 90°C for 1.5h, then neutralize with 5mol / L NaOH to a pH value of about 7.5, separate solid-liquid once, granulate into 3-5mm pellets, and dry at 90°C. After calcining at 750°C for 3 hours, 90kg of printing and dyeing wastewater decolorization materials can be obtained. The produced filtrate is evaporated and concentrated, crystallized and separated to obtain Na 2 SO 4 10H 2 O by-product about 80kg, mother liquor recycling. The particle strength of the decolorizing material and its decolorizing effect on a single pure dye with different properties and actual printing and dyeing wastewater are shown in Table 1.

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Abstract

The present invention relates to production process of decolorizing material for printing and dyeing waste water, and features that Hangjin clay No. 2 as main material is prepared into the decolorizing material through crushing to 40-80 mesh, activating with 1.0-2.5 mol/L concentration H2SO4 solution in the quantity of 2-3 times at 80-95 deg.c for 1-2 hr, neutralizing with 3-6 mol/L concentration alkali solution to pH 7-8, solid-liquid separating, pelletizing, stoving at 90-100 deg.c and calcining at 750 deg.c for 2-4 hr. The produced filtrate may be evaporated and concentrated to obtain side product Na2SO4 .10H2O or (NH4)2SO4. The decolorizing material has decolorizing rate on printing and dyeing waste water higher than 94 %. The production process is simple and low in cost, and has no pollutant exhaust.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for manufacturing printing and dyeing wastewater decolorization materials, in particular to a technology for manufacturing printing and dyeing wastewater decolorization materials by using a non-metallic clay mineral—Hangmian 2# soil as a raw material. Background technique [0002] Printing and dyeing wastewater is one of the most difficult industrial wastewater. Its existence not only affects the sustainable development of the textile printing and dyeing industry, but also poses a threat to the living environment of human beings to a certain extent. It is imperative to solve the pollution problem of printing and dyeing wastewater. Research and development of new and efficient printing and dyeing wastewater decolorization materials is one of the effective ways to solve this problem. Among them, the use of clay minerals such as bentonite, palygorskite, and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/42C02F1/52
Inventor 姚亚东尹光福郭向利罗勇康云清卓浪贺异昱张磊梁莹
Owner SICHUAN UNIV
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