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Method for preparing activated carbon by utilizing polyvinyl alcohol

A technology for preparing activated carbon and polyvinyl alcohol, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of serious corrosion of equipment, difficult to meet market demand, etc., to reduce corrosion, save costs, simple craftsmanship

Active Publication Date: 2016-01-20
黑冻科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficult to meet market demand
Due to the use of highly alkaline substances, the equipment is severely corroded

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Preparation of activated carbon using polyvinyl alcohol

[0045] Prepare an aqueous solution of polyvinyl alcohol with a concentration of 10% by mass, a calcium chloride solution with a concentration of 20% by mass, and a sodium hydroxide solution with a concentration of 20% by mass. Among them, the degree of alcoholysis of polyvinyl alcohol is 88%. The polyvinyl alcohol aqueous solution and the calcium chloride solution are mixed at a weight ratio of 1:5, and stirred evenly. Under stirring, sodium hydroxide solution was added to the aforementioned solution, and the weight ratio of sodium hydroxide solution to calcium chloride solution was 1:0.72; the reaction produced a large amount of white calcium hydroxide precipitate. The precipitate was separated by filtration. The precipitate is transferred to the carbonization furnace and calcined at a high temperature. The calcining temperature is controlled at 800°C and the calcining time is 1 hour. After cooling, tr...

Embodiment 2

[0047] Example 2 Preparation of activated carbon using polyvinyl alcohol

[0048] Prepare an aqueous solution of polyvinyl alcohol with a concentration of 5% by mass, a calcium chloride solution with a concentration of 40% by mass, and a sodium hydroxide solution with a concentration of 5% by mass. Among them, the degree of alcoholysis of polyvinyl alcohol is 88%. The polyvinyl alcohol aqueous solution and the calcium chloride solution are mixed at a weight ratio of 1:1, and stirred evenly. Under stirring, sodium hydroxide solution was added to the aforementioned solution, and the weight ratio of sodium hydroxide solution to calcium chloride solution was 1:5.77; the reaction produced a large amount of white calcium hydroxide precipitate. The precipitate was separated by filtration. The precipitate is transferred to a carbonization furnace and calcined at a high temperature. The calcining temperature is controlled at 500°C and the calcining time is 5 hours. After cooling, trans...

Embodiment 3

[0050] Example 3 Preparation of activated carbon using polyvinyl alcohol

[0051] Prepare an aqueous solution of polyvinyl alcohol with a concentration of 20% by mass, a calcium chloride solution with a concentration of 5% by mass, and a sodium hydroxide solution with a concentration of 40% by mass. The degree of alcoholysis of polyvinyl alcohol is 88%. The polyvinyl alcohol aqueous solution and the calcium chloride solution are mixed at a weight ratio of 1:10, and stirred evenly. Under stirring, sodium hydroxide solution was added to the aforementioned solution. The weight ratio of sodium hydroxide solution to calcium chloride solution was 1:0.09; the reaction produced a large amount of white calcium hydroxide precipitate. The precipitate was separated by filtration. The precipitate is transferred to a carbonization furnace and calcined at a high temperature. The calcining temperature is controlled at 1000°C and the calcining time is 0.5 hours. After cooling, transfer the mat...

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Abstract

The invention relates to a method for preparing active carbon with high specific surface area by using polyving akohol as a material and belongs to the field of a carbon material in materials. The method for preparing active carbon by using polyving akohol mainly comprises the steps of: mixing polyving akohol molecules with calcium hydroxide solid in water solution; filtering and separating to obtain sediment, then calcining the sediment at a high temperature; charring the polyving akohol molecules under isolation of calcium hydroxide molecules, wherein the calcium hydroxide is discomposed into calcium oxide and water in a high-temperature charring process; then washing off the calcium oxide by using hydrochloric acid, thus finally obtaining the active carbon material with high specific surface area. The specific surface area of the active carbon prepared by the method is greater than 3000m<2> / g.

Description

Technical field [0001] The invention relates to a method for preparing activated carbon by using polyvinyl alcohol, and belongs to the field of carbon materials in materials. Background technique [0002] Activated carbon is a kind of microcrystalline carbon material with black appearance, developed internal void structure, large specific surface area, strong adsorption capacity, and electronic conductivity. It is a commonly used adsorbent and catalyst. [0003] High specific surface area activated carbon has better performance than ordinary activated carbon. It has the characteristics of narrow pore distribution, large adsorption capacity, fast adsorption speed and easy regeneration. It is widely used in the field of gas separation and purification. Activated carbon with high specific surface area can also be used as an electrode material for supercapacitors, using the high specific surface area and electronic conductivity of activated carbon. As an efficient secondary energy sou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12C01B32/318C01B32/348
Inventor 廖川平
Owner 黑冻科技有限公司