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Method for preparing high mode number waterglass and active carbon by rice hull ash

A technology of high modulus water glass and activated carbon, applied in the direction of alkali metal silicate, silicate, etc., can solve the problems of low density of rice husk, environmental pollution, large volume, etc., and achieve the effect of low cost and environmental protection

Inactive Publication Date: 2009-06-17
NANCHANG UNIV
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AI Technical Summary

Problems solved by technology

At present, rice husk is mostly used as primary fuel, and the produced rice husk has low density and large volume, which pollutes the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Take by weighing the rice husk ash 40g of superfine pulverization and place in the round-bottomed flask, then by solid-liquid ratio 2:5 (solid mass: liquid volume), namely pour into the NaOH solution that boiled 100ml concentration is 2mol / l, in round-bottomed flask Install a condensation reflux device on the bottom flask, place the round bottom flask in a boiling water bath and react for 4 hours, filter it with a suction filter immediately after the reaction is finished, boil and wash it twice with 200ml of boiled deionized water, reclaim and combine the filtrate, filter residue first Soak in 1.5% hydrochloric acid for 2 hours, wash with water until neutral, and dry in an oven at 105°C for 12 hours. The modulus of water glass prepared by the above process can reach 3.5~3.6. The dried filter residue obtained by the above process is then activated with a KOH solution with a concentration of 20%. The activation temperature is 800°C, activated for 30 minutes, and then wash...

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PUM

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Abstract

The invention relates to a method for preparing high-mode water glass and activated carbon from rice husk ash, which is characterized by comprising: micro-milling, heating of an alkali liquor, reaction, filtration, washing by boiling water, acid leaching, filtration and washing, drying, secondary activation, water washing, drying, and crushing. The method has the advantages that the method adopts the rice husk ash as a raw material to prepare the activated carbon, and the rice husk ash not only has low cost but also dose not contain harmful substances, so that the method fully and comprehensively utilizes rice husks, and not only achieves the aim of using waste materials as resources but also protects the environment.

Description

technical field [0001] The invention relates to a method for preparing high modulus water glass and activated carbon, in particular to a method for preparing high modulus water glass and activated carbon with rice husk ash. Background technique [0002] After the rice husk is completely burned, its ash contains SiO 2 About 95% can be used as raw material for preparing water glass, and the unburned part of rice husk is mainly C with hollow network structure, which is an ideal raw material for preparing activated carbon. my country is a big rice producing country, and rice husk accounts for 18%-22% of the weight of rice grains. It is one of the main by-products of grain processing and is a renewable resource with a large quantity, wide range and low price. At present, rice husk is mostly used as primary fuel, and the produced rice husk has low density and large volume, which pollutes the environment. [0003] Rice husk is used as raw material to prepare water glass and activ...

Claims

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Application Information

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IPC IPC(8): C01B31/08C01B33/32
Inventor 刘伟李俶刘成梅张彦军涂宗财郑典模陈正行
Owner NANCHANG UNIV
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