A method for preparing activated carbon with high oxygen-containing functional groups at low temperature with organic alcohol/acid

A technology of organic alcohol and activated carbon, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve the effect of simple process, low energy consumption and easy access

Active Publication Date: 2015-11-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After retrieval, there is no method for preparing activated carbon at low temperature using organic alcohol / acid as raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Mix pentaerythritol powder with phosphoric acid at a mass ratio of 1:1; then place the above sample in a muffle furnace and carbonize and activate it at 250°C for 1 hour; turn off the power and simmer in the furnace for 1.5 hours before taking it out; then wash it with deionized water To pH = 6.5-7.0, filter and dry to obtain activated carbon with high oxygen-containing functional groups.

Embodiment 2

[0013] Mix tartaric acid powder with phosphoric acid at a mass ratio of 1:2.5; then place the above sample in a muffle furnace and carbonize and activate it at 350°C for 30 minutes; turn off the power and stew in the furnace for 1.5 hours before taking it out; then wash with deionized water To pH = 6.5-7.0, filter and dry to obtain activated carbon with high oxygen-containing functional groups.

Embodiment 3

[0015] Mix glucose powder with phosphoric acid at a mass ratio of 1:2; then place the above sample in a muffle furnace and carbonize and activate it at 300°C for 40 minutes; turn off the power and simmer in the furnace for 1.5 hours before taking it out; then wash it with deionized water To pH = 6.5-7.0, filter and dry to obtain activated carbon with high oxygen-containing functional groups.

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Abstract

The invention belongs to the field of material preparation and especially relates to a low-temperature preparation method of active carbon with a high-oxygen-containing functional group. According to the method, phosphoric acid is used as an activator, and organic alcohol / acid is glucose, pentaerythritol, citric acid or tartrate. Firstly, organic alcohol / acid powder and a phosphoric acid solution are mixed according to the ratio of 1:1-1:3; secondly, the mixture is placed in a muffle furnace and undergoes carbonization-activation at 250-350 DEG C; and finally, washing and drying are carried out. The method has advantages of simple technology, low energy consumption and high content of oxygen on the surface of the prepared active carbon. The prepared active carbon has high adsorption performance of heavy metal such as Ni (II), Cd (II), Pb (II), Cu (II), Cr (VI) and the like.

Description

1. Technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing activated carbon with high oxygen-containing functional groups at low temperature. 2. Background technology [0002] Activated carbon is a commonly used porous adsorbent, catalyst and catalyst carrier, widely used in petroleum, chemical industry, food, medicine, light industry, environmental protection, national defense, etc. There are many kinds of raw materials for making activated carbon, commonly used ones include wood, fruit shells, crop straws, waste plastics, synthetic resins, rubber, etc. Since these raw materials are composed of organic molecular polymers, in order to achieve a good impregnation effect and prepare high-performance activated carbon, the preparation of this type of activated carbon requires a longer impregnation time and a higher activation temperature. The activators used in conventional chemical activation methods are mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12C01B32/342
Inventor 张建刘海张成禄郭子彰程呈李一冉王静
Owner SHANDONG UNIV
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