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Method for preparing decoloring material of dyeing waste water by attapulgite ore

A technology of printing and dyeing wastewater and attapulgite, which is applied in the direction of adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of low mechanical strength and blister strength of granular materials, poor recyclability, and high corrosion of equipment. Achieve excellent decolorization performance, eliminate pollution, reduce the effect of production

Inactive Publication Date: 2006-10-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are low mechanical strength and water bubble strength of pellets, poor recyclability after thermal regeneration, and Cl - Disadvantages such as high corrosion to equipment
[0008] The above reports mentioned different methods of using attapulgite minerals as raw materials to prepare printing and dyeing wastewater decolorization materials. , drying, calcining to make granular decolorized materials, and the manufacturing process that can be reused many times after granulation without any additives and soaked in ammonium sulfate solution and has basically no pollutant emissions in the manufacturing process has not been reported yet.

Method used

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  • Method for preparing decoloring material of dyeing waste water by attapulgite ore

Examples

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Effect test

example 1

[0021] Attapulgite clay 100kg, 80 mesh, and H concentration of 1.5mol / L 2 SO 4 Mix with a solid-liquid ratio of 1:2.5, activate at room temperature 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 700°C for 1 hour, 85kg of printing and dyeing wastewater decolorization material 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.

[0022] Soak the decolorized material in a 5mol / L ammonium sulfate solution for 3 minutes and then calcinate it at 300°C for 5 minutes, which can be used repeatedly. 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

[0024] Attapulgite clay 100kg, 80 mesh, and the H concentration of 2.0mol / L 2 SO 4 Mix with a solid-liquid ratio of 1:2.0, activate at room temperature 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 700°C for 1 hour, 90kg of printing and dyeing wastewater decolorization material 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.

[0025] Soak the decolorized material in 3mol / L ammonium sulfate solution for 3min and then calcinate at 300°C for 5min, which can be used repeatedly. 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

[0027] Attapulgite clay 100kg, 100 mesh, and H concentration of 1.5mol / L 2 SO 4 Mix with a solid-liquid ratio of 1:2.0, activate at room temperature for 1.5 hours and add 5kg of ferrous sulfate, then neutralize with 5mol / L NaOH to a pH value of about 7.5, separate solid-liquid once, and granulate into 3-5mm granules. After drying at 90°C and calcining at 700°C for 1 hour, 90kg of printing and dyeing wastewater decolorization material 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.

[0028] Soak the decolorized material in 2mol / L ammonium sulfate solution for 3 minutes and then calcinate it at 300°C for 5 minutes, which can be used repeatedly. 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 invention relates to method for preparing decolouring material for printing and dyeing wastewater, which employs concave-convex stick mineral as main raw material (80-100 mu), mixing with sulfuric acid of 1.5-3.0 mol / l, the ratio between solid and liquid is 1:2-3, activating under room temperature for 1-2 hours; adding 0-5% of metallic sulphate such as iron, manganese and alumium (weight by metallic oxide); neutralizing with basic solution of 3-6 mol / l to make pH be about 7-8; solid-liquid separating, granulating (3-5 mm), drying, calcining under 700 Deg. C for 0.5-2 hours, and getting product. The invention can get side product of Na2SO4 10H2O or (NH4)2SO4 from filtering liquor; the decoloring material can be reused for more than four times after being immersed with ammonia sulfate of 1.5-6.0 mol / l for 2-5 minutes and calcined under 300 Deg.C for 5-25 minutes; the decoloration rate is over 94%, and decoloration rate with reused decoloraing material is over 91%. The invention is characterized by simple producing process, low cost and no pollution.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a printing and dyeing wastewater decolorization material for producing attapulgite mineral raw materials, in particular to a printing and dyeing wastewater decolorization material that can be repeatedly used by acid activation, alkali compounding various metal ions, and regeneration activation. 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 suc...

Claims

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Application Information

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