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Preparation method for organic activated clay used for decolorization

An activated clay and organic technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high cost and poor decolorization effect, and achieve low cost, simple preparation method and good application prospects. Effect

Inactive Publication Date: 2014-10-15
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-cost, high-efficiency organic activity solution for the problems of high cost and poor decolorization effect in the existing lignocellulosic agricultural and forestry waste hydrolyzate and colored wastewater and other water-based decolorization methods. The preparation method of white clay

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 200mL of water into the container and heat it in a water bath to 80°C, then add 40g of natural attapulgite clay mineral powder, stir at a constant temperature for 3 hours, let it stand, discard the upper layer of clear water and bottom sand, and filter the middle layer of slurry, and then in Dried in an oven, crushed and sieved to obtain rinsed attapulgite clay powder >100 mesh.

[0026] (2) Using 150mL, 12wt% hydrochloric acid (HCl) and 4wt% nitric acid (HNO 3) mixed solution to acid-modify the rinsed attapulgite clay powder: add 70mL water into the container and heat it in a water bath to 60°C, then add 50g rinsed attapulgite clay powder and stir evenly, and finally add HCl / HNO prepared with 38.7mL water slowly 3 Mixed solution (configure 150mL, the HCl of 12wt% and the HNO of 4wt% 3 When mixing the solution, the added 37wt% HCl and 65wt% HNO 3 The volumes are 35.61mL and 5.69mL respectively, so the volume of water at this time is 150-70-35.61-5.69=38.7mL), ...

Embodiment 2

[0030] (1) Add 300mL water into the container and heat it in a water bath to 60°C, then add 30g of natural montmorillonite clay mineral powder, stir at a constant temperature for 1 hour, then let it stand for 20 minutes, discard the clear water in the upper layer and the sand at the bottom, and filter the slurry in the middle layer, then Dried in an oven, crushed and sieved to obtain rinsed montmorillonite clay powder >100 mesh.

[0031] (2) Using 320mL, 20wt% acetic acid (CH 3 COOH) solution to acid-modify the rinsed montmorillonite clay powder: add 100mL water into the container and heat it in a water bath to 80°C, then add 40g rinsed montmorillonite clay powder and stir evenly at a constant temperature, and finally slowly add CH prepared with 92.51mL water 3 COOH solution (configure 320mL, total concentration is 20wt% CH 3 COOH solution, the added 36wt% CH 3 The volume of COOH is 127.49mL, so the volume of water at this time is 320-100-127.49=92.51mL), continue to stir an...

Embodiment 3

[0035] (1) Add 400mL of water into the container and heat it in a water bath to 50°C, then add 50g of natural sepiolite clay mineral powder, stir at a constant temperature for 2 hours, then let it stand for 20 minutes, discard the upper layer of clear water and bottom sand, and filter the middle layer of slurry, then Dried in an oven, crushed and sieved to obtain rinsed sepiolite clay powder >100 mesh.

[0036] (2) adopt 200mL, 3wt% sulfuric acid (H 2 SO 4 ) solution to acid-modify the rinsed sepiolite clay powder: add 100mL water into the container and heat it in a water bath to 90°C, then add 40g rinsed sepiolite clay powder and stir evenly at a constant temperature, and finally slowly add H 2 SO 4 Solution (configuration 200mL, total concentration is 3wt%H 2 SO 4 solution, adding 98wt% H 2 SO 4 The volume is 3.37mL, so the water volume at this time is 200-100-3.37=96.63mL), continue to stir and react at constant temperature for 3h, after the end, perform suction filtr...

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Abstract

The invention provides a preparation method for organic activated clay used for decolorization. The preparation method comprises the following steps: clay mineral is grinded into powder and the powder is subjected to water rinsing at the temperature of 50-80 DEG C; the obtained rinsed clay powder is subjected to modification processing in an acid solution of 3-20 weight percent at the temperature of 60-90 DEG C for 2-5 h; a cationic surfactant is added into the obtained clay based activated clay at the temperature of 50-90 DEG C to react continuously for 2-8 h to obtain slurry; the obtained slurry is filtered, washed and dried in a drying oven; the dried materials are pulverized and screened to obtain organic activated clay powder greater than 200 mesh, wherein the adding amount of the cationic surfactant is 5-50 weight percent of the weight of the activated clay. According to the preparation method, non-metallic clay mineral is adopted as raw materials and subjected to rinsing, acidifying and organic processing for preparing clay mineral based organic activated clay which is suitable for desorbing coloring matters and organic pollutant in water-based system, the preparation method is simple, the cost is low, the industrial magnification production is facilitated and the organic activated clay has better application prospect in the field of wastewater treatment and biological processing.

Description

【Technical field】 [0001] The invention belongs to the technical field of organic adsorbents, and in particular relates to a preparation method of organic activated clay for decolorization. 【technical background】 [0002] With the development of industry, the treatment of colored wastewater from textiles, printing and dyeing, ink, leather, rubber, coking, papermaking, pharmaceuticals, surface treatment, etc. has become a major problem in wastewater treatment. This is mainly because some organic compounds in these wastewaters cannot be degraded, and some of these compounds contain chromophores such as ethylenic bonds, carboxyl groups, amido groups, sulfonamide groups, carbonyl groups and nitro groups, and contain —NH 2 ,—NHR,—NR 2 , -OR, -OH and -SH and other auxochromes, their interaction causes the chromaticity of the water to remain high. At the same time, these groups are polar, so that the organic matter in the effluent is easily soluble in water, and it is possible to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
Inventor 陈新德郭海军张海荣杨会娟熊莲彭芬王璨王波黄超林晓清
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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