Preparation method of active carbon

A technology of activated carbon and carbon slag, applied in the field of activated carbon, can solve the problems such as the decline of activated carbon adsorption and adsorption effect, and achieve the effects of saving the cost of environmental pollution control, low production cost, and rich raw material resources

Active Publication Date: 2012-02-08
NANTONG FOREIGN TRADE MEDICINES & HEALTH PRODUCTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Impurities in the medium continuously enter the porous structure of activated carbon through physical adsorption and chemical adsorption, which saturates the adsorption of activated carbon and reduces the adsorption effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Hydrolysis: pump 2000L of hydrochloric acid with a mass concentration of 30% into the reactor, heat it with steam to 65°C, then put in 1000kg of citric acid waste residue, heat up to 100°C with steam, and perform the hydrolysis reaction for 2.5 hours.

[0021] (2) Suction filtration: the above-mentioned hydrolyzed material is put into the suction filtration bucket and carries out suction filtration, the carbon residue after the suction filtration is rinsed 2 times with tap water, then with mass concentration is 2% sodium hydroxide solution rinse to neutrality, Collect carbon residue.

[0022] (3) drying: put the above-mentioned carbon slag into an airflow drier for drying, the inlet temperature of the airflow drier is 150°C, the outlet temperature is 85°C, and dry until the water content of the carbon slag is below 6%;

[0023] (4) Granulation: the dried carbon slag is mixed with carboxymethyl cellulose (CMC) in a weight ratio of 100:5, fully mixed and then extruded...

Embodiment 2

[0027] (1) Hydrolysis: pump 2200L of hydrochloric acid with a mass concentration of 25% into the reactor, heat it with steam to 60°C, then add 1200kg of citric acid waste residue, heat up to 105°C with steam, and perform hydrolysis for 5 hours.

[0028] (2) Suction filtration: the above-mentioned hydrolyzed material is put into the suction filtration bucket and carries out suction filtration, the carbon residue after the suction filtration is rinsed 3 times with tap water, then with mass concentration is 3% ammonium hydroxide solution rinse to neutrality, Collect carbon residue.

[0029] (3) drying: put the above-mentioned carbon slag into an airflow drier for drying, the inlet temperature of the airflow drier is 140°C, the outlet temperature is 80°C, and dry until the water content of the carbon slag is below 6%;

[0030] (4) Granulation: mix the dried carbon slag into heavy tar at a weight ratio of 100:5, mix well and then extrude into granules to make granular carbon slag; ...

Embodiment 3

[0034] (1) Hydrolysis: pump 1800L of hydrochloric acid with a mass concentration of 25% into the reactor, heat it with steam to 70°C, then add 800kg of citric acid waste residue, heat up to 90°C with steam, and perform the hydrolysis reaction for 2 hours.

[0035] (2) Suction filtration: the above-mentioned hydrolyzed material is put into the suction filtration bucket and carries out suction filtration, and the carbon residue after the suction filtration is rinsed 2 times with tap water, and then with mass concentration is 1% sodium hydroxide solution rinsing to neutrality, Collect carbon residue.

[0036] (3) Drying: put the above-mentioned carbon slag into an airflow drier for drying, the inlet temperature of the airflow drier is 160°C, the outlet temperature is 90°C, and dry until the water content of the carbon slag is below 6%;

[0037] (4) Granulation: mix the dried carbon slag with asphalt in a ratio of 100:5 by weight, fully mix and then extrude into granules to make g...

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PUM

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Abstract

The invention discloses a preparation method of active carbon. Active carbon is prepared through carrying out steps of hydrolysis, pumping filtration, drying, granulation, carbonization, activation and the like on a citric acid waste residue which is treated as a raw material. According to the invention, the citric acid waste residue is recycled, so the pollution of the waste residue to environment is reduced; active carbon is produced through treating the citric acid waste residue as the raw material with a gas activation process, so the preparation method of the invention has the advantagesof no pollution, safety and environmental protection, and simple process; raw material resources are abundant, so the production cost is low; and the cost for treating environment pollution is further saved, and high circular economy effects are achieved.

Description

technical field [0001] The invention relates to the field of activated carbon, in particular to a method for preparing activated carbon from citric acid waste residue. Background technique [0002] Citric acid is a widely used organic acid. It can be used as a sour agent, thickener, and cleaning agent. It is widely used in food, beverage, pharmaceutical, chemical, detergent and other industries. Stimulated by exports, my country's domestic citric acid production increased from 380,000 tons in 2001 to 700,000 tons in 2005, and about 800,000 tons in 2006, with an average annual increase of 12.5%. 70% of the world. At present, in the process of producing citric acid by fermentation method in most enterprises, a large amount of citric acid waste residue is not comprehensively utilized, and is directly discharged. [0003] Activated carbon is a carbon with a large specific surface area and a porous structure. According to its raw material classification, it can be divided into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 白建国王德桂王健
Owner NANTONG FOREIGN TRADE MEDICINES & HEALTH PRODUCTS CO LTD
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