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Process for preparing large and medium pore high performance active carbon

A kind of activated carbon, a technology for producing activated carbon, applied in the direction of chemical instruments and methods, other chemical processes, etc., can solve the problem of low strength of granular carbon

Inactive Publication Date: 2004-07-14
谢仁智 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

National standard superior product (GB / T 1380.3-1999) A method caramel decolorization rate is 100%, B method caramel decolorization rate is 100%, the granular carbon produced has low strength

Method used

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  • Process for preparing large and medium pore high performance active carbon
  • Process for preparing large and medium pore high performance active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 10 parts of apricot shells of 10-20 mesh are soaked at 60-120 DEG C for 10-24 hours with 30-85% phosphoric acid and 3-10 parts of 98% sulfuric acid and hydrochloric acid mixed acid solution, and the excess acid solution is filtered off. The soaked apricot shells are cured at 40-120° C. for 4-24 hours, and after curing, the soaked apricot shells are activated at 300-700° C. for 0.5-4 hours. The activated material is recovered phosphoric acid, washed, dried, and hardened at 100-500°C for 0.5-3 to obtain 3.3 parts of finished granular activated carbon. The adsorption value of apricot shell charcoal methylene blue is as high as 300mg / g (20ml / 0.1g), the decolorization rate of B method caramel is 160%, the strength is greater than 80%, the iodine adsorption value is greater than 1200mg / g, and the yield is 33%.

Embodiment 2

[0013] 10 parts of 6-8 mesh coconut shells are soaked with 30-85% phosphoric acid and 3-10 parts of 98% sulfuric acid and hydrochloric acid mixed acid solution at 80-120°C for 10-24 hours, and the excess acid solution is filtered off. The impregnated coconut shell is cured at 40-120°C for 4-24 hours, and after curing, the impregnated coconut shell is activated at 300-700°C for 0.5-4 hours. The activated material is recovered phosphoric acid, washed, dried, and hardened at 100-500°C for 0.5-3 to obtain 3.3 parts of finished granular activated carbon. The adsorption value of coconut shell charcoal methylene blue is as high as 285mg / g (19ml / 0.1g), the decolorization rate of B method caramel is 150%, the strength is greater than 80%, the iodine adsorption value is greater than 1200mg / g, and the yield is 33%.

Embodiment 3

[0015] 10 parts of 10-20 mesh spade shells are soaked at 60-120° C. for 10-24 hours with 30-85% phosphoric acid and 3-10 parts of 98% sulfuric acid and hydrochloric acid mixed acid solution, and the excess acid solution is filtered off. The soaked spade shells are cured at 40-120°C for 4-24 hours, and the soaked spade shells are activated at 300-700°C for 0.5-4 hours after curing. The activated material is recovered phosphoric acid, washed, dried, and hardened at 100-500°C for 0.5-3 to obtain 3.3 parts of finished granular activated carbon. The carbon methylene blue adsorption value of spade shell is as high as 292.5mg / g (19.5ml / 0.1g), the caramel decolorization rate of method B is 160%, the strength is greater than 80%, the iodine adsorption value is greater than 1200mg / g, and the yield is 33%.

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Abstract

The production process of active carbon with wooden material features the activating assistant phosphoric acid, activating agent mixed acid comprising sulfuric acid, hydrochloric acid, etc., increased curing and hardening steps and the active carbon product with strong adsorption performance to macro molecular compounds and high strength. The prepared fruit shell active carbon has methylene blue adsorbing rate up to 300 mg / g, caramel decoloring rate of 160 %, iodine adsorbing value up to 1200 mg / g, strength higher than 80 % and yield up to 33 %. The prepared wood dust active carbon has methylene blue adsorbing rate up to 255 mg / g, caramel decoloring rate of 180 % and yield up to 30 %.

Description

1. Technical field: [0001] The invention belongs to a method for producing woody activated carbon, in particular to a method for producing woody activated carbon with strong macromolecule adsorption performance and high granular carbon strength. 2. Background technology: [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 medium and large pores. The adsorption of macromolecules requires the use of activated carbon with large and medium pores. [0003] At present, the large and medium-porous activated carbon produced by chemical methods (zinc chloride method, phosphoric acid method) has a methylene blue adsorption value of 240mg / g (16ml) higher, and the decolorization rate of B method caramel reaches 120%. The national standard premium product (GB / T 1380.3-1999) has a decolorizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C01B31/12
Inventor 谢仁智邱林
Owner 谢仁智
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