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Rice hull adsorbent for absorbing dye and manufacturing method thereof

A technology for adsorbing dyes and manufacturing methods, applied in chemical instruments and methods, and other chemical processes, can solve the problems of less rice husk manufacturing raw materials, less adsorbents, etc., and achieve good environmental performance, large adsorption capacity, and high adsorption capacity. Effect

Inactive Publication Date: 2010-06-02
WENZHOU GRAIN & OIL SCI INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the requirements for environmental protection, the environmental protection requirements for the adsorbents of dyed dyes are getting higher and higher. The adsorbents currently used are made of various materials, but there are few adsorbents using environmentally friendly materials, and even fewer Using discarded rice husks as raw materials for the manufacture of adsorbents

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be described in further detail below.

[0015] The rice husk adsorbent for adsorbing dyestuffs of the present invention is obtained through the following steps: first remove 100 g of rice husks from sediment impurities, and then use a pulverizer to crush them to 20 meshes, and then select 25ml-45ml of them with a concentration of 4.5%-8.5 % (w / v) of sulfuric acid as an activator, activate at 110°C-150°C for 45-75 minutes, and then select 20ml-50ml of hydrogen peroxide with a concentration of 6.0%-18% (w / v) as the oxidizing agent As an activator, sulfuric acid is added to adjust the pH value to below 6.0, and then activated at an activation temperature of 170°C-200°C for 40-80 minutes. Since such an adsorbent uses the currently discarded rice husk as a raw material, the cost of the raw material is extremely low, and the supply of the raw material can be relatively large, and the adsorbent produced has a relatively large adsorption capacity, a r...

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PUM

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Abstract

The invention discloses a rice husk adsorbent for dye absorption, which is prepared by the following steps: (1) 100g rice husk is prepared, the sediment impurity is removed, and the rice husk is crushed into 20 meshes, (2) 25ml-45ml sulphuric acid with a concentration of 4.5%-8.5% (w / v) is adopted as activator, and the rice husk is activated for 45-75 min at the activation temperature of 110-150 DEG C, and (3) 20ml-50ml hydrogen peroxide with a concentration of 6.0%-18% (w / v) is adopted as oxidative activator, sulphuric acid is added to adjust pH value below 6.0, and the rice husk is activatedfor 40-80min at the activation temperature of 170-200 DEG C. The rice husk adsorbent for dye absorption has the advantages of adopting the waste rice husk as basic material, relatively ideal absorption selectivity and quantity, good absorption performance with absorption rate above 50%, and low cost.

Description

technical field [0001] The invention relates to an adsorbent, in particular to a rice husk adsorbent for adsorbing dyes. The present invention also relates to a method for producing such adsorbed dyes. Background technique [0002] In recent years, with the improvement of living and production standards, people have higher and higher requirements for the food they eat and the clothes they wear. The materials of clothing should be environmentally friendly and harmless to the body, and the dyes are also required to be environmentally friendly. Further, for sustainable development, higher environmental protection requirements are proposed for the adsorption of fuel in printing and dyeing wastewater, and the harmless requirements for clothing dyes are also increasing. more refined. Due to the requirements for environmental protection, the environmental protection requirements for the adsorbents of dyed dyes are getting higher and higher. The adsorbents currently used are made ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 洪建捷谢荣辉
Owner WENZHOU GRAIN & OIL SCI INST