Preparation method of pecan shell active carbon

A hickory shell and activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high equipment requirements, ecological damage, energy consumption, etc., to protect the ecological environment, low cost, and easy to operate. Effect

Inactive Publication Date: 2017-07-25
句容市百诚活性炭有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, activated carbon mostly uses wood as raw material, which is relatively expensive, and this will undoubtedly cause a large number of forests to be cut down, seriously damaging the ecology, and the production process often involves high temperatures above 800 ° C, which requires high equipment and consumes a lot of energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After crushing the pecan shells, bake them at 105°C for 100 minutes, then soak them in a phosphoric acid solution with a concentration of 25% by weight, and filter them with a weight ratio of 1:2 between the pecan shells and the phosphoric acid solution; place the filtered residue in a muffle Heating and activating in a furnace, the activation temperature is 300°C, the time is 60min, and then cooled to room temperature to obtain the activated product; the activated product is pickled with 3wt% dilute hydrochloric acid, washed with water until neutral, and finally passed through a 100-mesh sieve to obtain Hickory shell activated carbon, yield 69%.

[0021] According to the experiment, the iodine adsorption value of hickory shell activated carbon is 798mg / g, and the decolorization power of methylene blue is 110mL / g.

Embodiment 2

[0023] After crushing the pecan shells, bake them at 110°C for 80 minutes, then soak them in a phosphoric acid solution with a concentration of 30wt%, and filter them with a weight ratio of 1:3 between the pecan shells and the phosphoric acid solution; put the filtered residue in a muffle Heating and activating in a furnace, the activation temperature is 350°C, the time is 50min, and then cooled to room temperature to obtain the activated product; the activated product is pickled with 4wt% dilute hydrochloric acid, washed with water until neutral, and finally passed through a 100-mesh sieve to obtain Hickory shell activated carbon, the yield is 61%.

[0024] According to the experiment, the iodine adsorption value of hickory shell activated carbon is 812mg / g, and the decolorization power of methylene blue is 109mL / g.

Embodiment 3

[0026] After crushing the hickory nut shells, bake them at 120°C for 60 minutes, then soak them in a phosphoric acid solution with a concentration of 35wt%, and filter them in a weight ratio of 1:4 between the hickory shells and the phosphoric acid solution; put the filtered residue in a muffle Heating and activating in the furnace, the activation temperature is 400°C, the time is 30min, and then cooled to room temperature to obtain the activated product; the activated product is pickled with 5wt% dilute hydrochloric acid, washed with water until neutral, and finally passed through a 100-mesh sieve to obtain Hickory shell activated carbon, yield 53%.

[0027] According to the experiment, the iodine adsorption value of hickory shell activated carbon is 803mg / g, and the decolorization power of methylene blue is 123mL / g.

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Abstract

The invention relates to a preparation method of pecan shell active carbon. Pecan shells are crushed and are then dried; then, the dried walnut shells are added into a phosphoric acid solution with the concentration being 20 to 35 weight percent to be soaked; filtering is performed; filter slag obtained through filtering is put into a muffle furnace to be heated and activated; then, the materials are cooled to room temperature to obtain activated materials; the activated materials are subjected to acid washing, and are then washed by water to a neutral state; finally, sieving is performed to obtain a finished product. The method provided by the invention has the advantages that the process is simple; the operation is convenient; the consumption of a great number of energy sources is not needed; the cost is low; the pecan shells are used as a raw material; the source of the raw material is wide; the ecological environment is protected; the adsorption effect of the prepared active carbon is good.

Description

technical field [0001] The invention relates to a preparation method of activated carbon, in particular to a preparation method of pecan shell activated carbon, which belongs to the technical field of fine chemicals. Background technique [0002] Activated carbon is a carbonaceous adsorption material with rich pore structure and huge specific surface area. It has the characteristics of strong adsorption capacity, good chemical stability, high mechanical strength, and convenient regeneration. It is widely used in industry, agriculture, and national defense. , transportation, medical and health, environmental protection and other fields, its demand is increasing year by year with the social development and the improvement of people's living standards, especially in recent years, with the increasing requirements of environmental protection, the demand for activated carbon at home and abroad Getting bigger and bigger every year. [0003] At present, activated carbon mostly uses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342
CPCC01P2004/51
Inventor 叶孙龙
Owner 句容市百诚活性炭有限公司
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