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Method for producing decolorized activated carbon by phosphoric acid method

A technology of activated carbon and phosphoric acid, applied in chemical instruments and methods, inorganic chemistry, other chemical processes, etc., can solve problems such as difficult control of materials and temperature, unstable product quality, high corrosion of equipment, etc., and achieve good product quality stability , highly competitive in the market and value for popularization and application, and the effect of low corrosion of equipment

Inactive Publication Date: 2020-08-04
王占军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing chemical methods are produced by large-scale converters. Heating is by burning biomass fuel or natural gas, and carbonization is activated by flue gas heating. problem, but the heating efficiency drops dramatically
It is difficult to control the internal materials and temperature in converter production, resulting in unstable product quality
Because there are strong acidic chemicals such as phosphoric acid in the raw materials, they are highly corrosive to the equipment and pollute the environment. At the same time, it will also increase the impurities of the product and reduce the quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method utilizing phosphoric acid method to produce decolorized activated carbon, comprising the steps:

[0028] (1) Washing treatment:

[0029] Wash the sawdust with water to remove the mud and sand mixed in the sawdust for later use;

[0030] (2) Raw material pretreatment:

[0031] Immerse the sawdust treated in step (1) in the dilute acid solution, soak the sawdust for 1.5 hours, take out the sawdust and dry it for later use;

[0032] (3) Raw material kneading treatment:

[0033] Put the sawdust and phosphoric acid solution treated in step (2) into the kneader for blending and kneading treatment, and take it out for later use after completion;

[0034] (4) heating carbonization activation treatment:

[0035] Put the material obtained in step (3) into the carbonization activation furnace, carry out carbonization activation treatment, take out the activated material after 20min for subsequent use;

[0036] (5) Phosphoric acid recovery treatment:

[0037] The gac...

Embodiment 2

[0047] A method utilizing phosphoric acid method to produce decolorized activated carbon, comprising the steps:

[0048] (1) Washing treatment:

[0049] Wash the sawdust with water to remove the mud and sand mixed in the sawdust for later use;

[0050] (2) Raw material pretreatment:

[0051] Immerse the sawdust treated in step (1) in the dilute acid solution, soak the sawdust for 1.8 hours, take out the sawdust and dry it for later use;

[0052] (3) Raw material kneading treatment:

[0053] Put the sawdust and phosphoric acid solution treated in step (2) into the kneader for blending and kneading treatment, and take it out for later use after completion;

[0054] (4) heating carbonization activation treatment:

[0055] Put the material obtained in step (3) into the carbonization activation furnace, carry out carbonization activation treatment, take out the activated material after 40min for subsequent use;

[0056] (5) Phosphoric acid recovery treatment:

[0057] Soak th...

Embodiment 3

[0067] A method utilizing phosphoric acid method to produce decolorized activated carbon, comprising the steps:

[0068] (1) Washing treatment:

[0069] Wash the sawdust with water to remove the mud and sand mixed in the sawdust for later use;

[0070] (2) Raw material pretreatment:

[0071] Immerse the sawdust treated in step (1) in the dilute acid solution, soak the sawdust for 2 hours, take out the sawdust and dry it for later use;

[0072] (3) Raw material kneading treatment:

[0073] Put the sawdust and phosphoric acid solution treated in step (2) into the kneader for blending and kneading treatment, and take it out for later use after completion;

[0074] (4) heating carbonization activation treatment:

[0075] Put the material obtained in step (3) into the carbonization activation furnace, carry out carbonization activation treatment, take out the activation material after 50min for subsequent use;

[0076] (5) Phosphoric acid recovery treatment:

[0077]Soak the ...

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Abstract

The invention discloses a method for producing decolorized activated carbon by using a phosphoric acid method, which belongs to the technical field of activated carbon production and comprises the following steps: (1) water washing treatment, (2) raw material pretreatment, (3) raw material kneading treatment, (4) heating carbonization activation treatment, (5) phosphoric acid recovery treatment, (6) cleaning treatment, and (7) finished product preparation. The activated carbon prepared by the method disclosed by the invention is higher in adsorbability; the product quality stability is better,due to the high carbonization activation speed, the low temperature and the carbonization activation mode, impurities are hardly brought in in the carbonization activation process, the ash content ofthe product is lower, the yield is higher, the loss of an activating agent is smaller, the equipment corrosivity is low, the used electric energy is less, and the environment-friendly effect is better.

Description

technical field [0001] The invention belongs to the technical field of activated carbon production, and in particular relates to a method for producing decolorized activated carbon by using a phosphoric acid method. Background technique [0002] Most of the existing chemical methods are produced by large-scale converters. Heating is by burning biomass fuel or natural gas, and carbonization is activated by flue gas heating. It is easy to bring a large amount of impurities into the product. Although external heating can solve the problem of impurities brought in by flue gas problem, but the heating efficiency drops drastically. It is difficult to control the internal materials and temperature of the converter, resulting in unstable product quality. Because there are strong acidic chemicals such as phosphoric acid in the raw materials, they are highly corrosive to the equipment and pollute the environment. At the same time, it will also increase the impurities of the product a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342C01B32/324B01J20/20B01J20/30
CPCC01B32/342C01B32/324B01J20/20
Inventor 王占军
Owner 王占军