Method for preparing food hygiene-level active carbon by use of bagasse

A food hygiene grade, bagasse technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of rare high-performance activated carbon practical technology, achieve excellent decolorization and adsorption capacity, simple collection, large output Effect

Active Publication Date: 2014-05-21
JIANGSU ZHUHAI ACTIVATED CARBON CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] Chinese patent CN101920966 discloses a method of utilizing rice husk ash to produce activated carbon, that is, first adopting basic carbonate secondary alkali dissolution at a lower temperature, and after filtering, use strong alkali such as sodium hydroxide as an activator to activate and wash After drying, activated carbon with a higher specific surface area is obtained; Chinese patent CN101717085 uses coal tar pitch as a raw material, and after preoxidation, it is also activated with a strong basic compound as an activator, and then cleaned with a detergent, and dried to obtain a A spherical activated carbon product; however, the practical technology of large-scale production of high-performance activated carbon using bagasse as raw material in my country is still very rare

Method used

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  • Method for preparing food hygiene-level active carbon by use of bagasse

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Embodiment 1

[0035] The bagasse and water were mixed and stirred at a solid-to-liquid ratio of 1:1, washed 3 times, and dried naturally; then the bagasse was fermented at 10°C for 30 days, and passed through a 30-mesh sieve to remove small particles; The phosphoric acid solution with a concentration of 400g / L is used as the active agent, and the fermented bagasse and the active agent solution are mixed and soaked according to the impregnation ratio of 1.5:1, and after stirring for 3 hours at 20°C, the bagasse and the active agent solution are separated by filtration. The active agent solution is recovered and recycled; then, the bagasse obtained by filtration is carbonized at 350°C for 550 minutes, heated to 500°C and activated for 120 minutes, rinsed with water until the pH value is 3, and finally, dried and pulverized to 200 mesh, Get the final activated carbon product.

Embodiment 2

[0037] The bagasse and water were mixed and stirred at a solid-to-liquid ratio of 1:4, washed twice, and dried naturally; then the bagasse was fermented at 20°C for 26 days, passed through a 30-mesh sieve, and small particles were removed; Potassium carbonate solution with a concentration of 300g / L is used as the active agent, and the fermented bagasse and the active agent solution are mixed and soaked according to the impregnation ratio of 2:1. After stirring at 30°C for 2 hours, the bagasse and the active agent solution are separated by filtration , the active agent solution is recovered and recycled; then, the filtered bagasse is carbonized at 400°C for 480 minutes, heated to 700°C for 80 minutes, rinsed with water until the pH value is 5, and finally dried and pulverized to 200 mesh , to obtain the final activated carbon product.

Embodiment 3

[0039]Mix bagasse and water with a solid-to-liquid ratio of 1:8, wash once, and dry in an oven at 70°C for 5 hours; then ferment the washed and dried bagasse at 40°C After 23 days, pass through a 40-mesh sieve to remove small particles; use potassium carbonate solution with a concentration of 600g / L as the active agent, mix and soak the fermented bagasse and active agent solution according to the immersion ratio of 0.4:1, and soak at 60°C After insulated and stirred for 0.5 hours, filter and separate the bagasse and the active agent solution, and recycle the active agent solution; then, carbonize the filtered bagasse at 450°C for 400 minutes, raise the temperature to 750°C to continue activation for 55 minutes, and rinse with water until the pH value is 4, and finally, dry and pulverize to 200 mesh to obtain the final activated carbon product.

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Abstract

The invention relates to an active carbon material, and particularly relates to a method for preparing food hygiene-level active carbon by use of biological waste resource bagasse. The method comprises the steps of collecting and cleaning the residual bagasse after sugar production; sufficiently fermenting at 10-50 DEG C, drying, grinding and sieving; then performing the operation treatment such as soaking in an active agent solution, charring, activation and the like on the pretreated bagasse; washing, drying and grinding to obtain a high-performance active carbon product which can be applied to decoloration, refining and impurity removal of the sugar industry and the fields of foods and medicines such as medicinal crude drugs and the like. According to the method provided by the invention, by adopting the waste bagasse as a raw material, the comprehensive utilization of resources and environmental protection are facilitated; moreover, the price is low, the product quality is high, and the economic and social benefits are good.

Description

technical field [0001] The invention relates to an activated carbon material, in particular to a method for preparing food hygiene-grade activated carbon by utilizing the biological waste resource-bagasse. Background technique [0002] Bagasse is the main by-product of the sugar industry and an important renewable biomass resource; China is the third largest sugarcane planting country after Brazil and India, with a total sugarcane output of more than 70 million tons. The fibrous stalk material-bagasse has an output of more than 7 million tons; the composition of bagasse is mainly cellulose, hemicellulose and lignin, and the content of protein, starch and soluble sugar is less; due to the lignification of bagasse The degree is relatively high, and there are silicified cells in the stem epidermis. It has been difficult to be effectively transformed and utilized for a long time, and it is often discarded, or simply used as fuel, and the utilization rate is very low. The pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12C01B32/324C01B32/342C01B32/348
Inventor 李正元
Owner JIANGSU ZHUHAI ACTIVATED CARBON CO LTD
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