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Method for preparing big and medium hole high performance active carbon

A high-performance, activated carbon technology, used in the manufacture of wood-based activated carbon, can solve the problem of low strength of granular carbon

Inactive Publication Date: 2009-01-07
谢仁智 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Granular carbon produced by chemical methods is not strong

Method used

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  • Method for preparing big and medium hole high performance active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 10 parts of dry apricot shells of 10-20 mesh, impregnated with 30-85% concentration of phosphoric acid, concentrated sulfuric acid, hydrochloric acid mixed acid (the amount of concentrated sulfuric acid and hydrochloric acid is 2-10% of the amount of phosphoric acid), and the immersion temperature is 40-120 ℃, the immersion time is 4-24 hours, after immersion, filter off the excess immersion liquid, soak the apricot shells and cure them at 40 ℃-120 ℃ for 6-24 hours, and the cured phosphoric acid apricot husks are activated at 300-700 ℃ for 0.5 -4 hours. After activation, recover the acid in the activated material, wash, dry and solidify at 100-500°C for 0.5-3 hours to obtain 3.3 parts of finished granular activated carbon. After testing: the methylene blue adsorption value of apricot shell granular activated carbon is as high as 300mg / g (20ml / 0.1g), the caramel decolorization rate of method B is 160%, the iodine adsorption value is 1200mg / g, the granular carbon strength...

Embodiment 2

[0013] 10 parts of dried coconut shells of 6-8 mesh, impregnate 10-24 hours at 80-120°C for 10-24 hours with phosphoric acid of 30-85% concentration and 2-10% of the phosphoric acid content of concentrated sulfuric acid and hydrochloric acid. The impregnation solution, the impregnated coconut shell is cured at 40°C-120°C for 4-24 hours, and the cured phosphoric acid coconut shell is activated at 300-700°C for 0.5-4 hours. After activation, recover the acid in the activated material, wash, dry and solidify at 100-500°C for 0.5-3 hours to obtain 3.3 parts of finished granular activated carbon. After testing: the methylene blue adsorption value of coconut shell granular activated carbon reaches 285mg / g (19ml / 0.1g), the caramel decolorization rate of method B is 150%, the iodine adsorption value reaches 1200mg / g, the granular carbon strength is greater than 80%, and the yield is 33% .

Embodiment 3

[0015] 10 parts of dry-dried walnut shells of 10-20 mesh, soaked at 60-120°C for 10-24 hours with 30-85% phosphoric acid and 2-10% of phosphoric acid, concentrated sulfuric acid, hydrochloric acid, and filtered to remove excess The impregnating liquid, the soaked walnut shell is cured at 40°C-120°C for 4-24 hours, and the cured phosphoric acid walnut shell is activated at 300-700°C for 0.5-4 hours. After activation, recover the acid in the activated material, wash, dry and solidify at 100-500°C for 0.5-3 hours to obtain 3.3 parts of finished granular activated carbon. After testing: the methylene blue adsorption value of walnut granular activated carbon is as high as 292mg / g (19.5ml / 0.1g), the caramel decolorization rate of method B is 160%, the iodine adsorption value is 1200mg / g, the granular carbon strength is 80%, and the yield is 33%.

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Abstract

The invention relates to method of producing activated carbon by using wooden materials. The method is characterized in that the method is a method using the mixed acid of phosphoric acid, activation auxiliary agents of sulphuric acid, hydrochloric acid, etc. as an activating agent to produce big activated carbon with medium pores and high performance. In order to improve the strength of particular wooden activated carbon, the curing and hardening procedures are added to the process. The specific manufacturing process can be seen in figures. The methylene blue absorptive value of prepared shell granular activated carbon can reach up to 300mg / g, B caramel decolorization rate is 160 percent, the iodine sorption value reaches up to 1200mg / g, the strength is larger than or equal to 80 percent, and the yield is 33 percent. The methylene blue absorptive value of wooden meal powdered activated carbon reaches up to 255mg / g, B caramel decolorization rate is 180 percent, and the yield is 30 percent.

Description

technical field [0001] The invention belongs to a manufacturing method of woody activated carbon, in particular to a method for producing large, mesopore and high-performance wood powder activated carbon with strong ability to adsorb macromolecules, and to produce large and mesopore granular activated carbon with high strength and strong ability to adsorb macromolecules A method for manufacturing high-performance wood-based granular activated carbon. Background technique [0002] There are generally two types of activated carbon production: chemical method and physical method. The activated carbon produced by the physical method is mainly microporous, and the activated carbon produced by the chemical method is mainly large and medium-sized. The adsorption of macromolecular substances requires the use of activated carbon with large and medium pores. [0003] At present, the large and medium-porous activated carbon produced by chemical method (zinc chloride method, phosphoric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 谢仁智
Owner 谢仁智
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