Active carbon producing process with mixed stalk material

A technology for producing activated carbon and mixing raw materials, applied in the field of activated carbon production, can solve problems such as slow development, and achieve the effects of quick effect, high income and small investment scale

Inactive Publication Date: 2005-09-28
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this method has developed slowly recently. In China, the proportion of activated carbon produced by this method in the total output of activated carbon has dropped to about 1 / 3.

Method used

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  • Active carbon producing process with mixed stalk material
  • Active carbon producing process with mixed stalk material
  • Active carbon producing process with mixed stalk material

Examples

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Effect test

Embodiment 1

[0103] Example 1: Production process of straw mixed raw material activated carbon

[0104] In this embodiment, crop stalks are mixed in a certain proportion, the mixed raw materials of crop stalks, fruit tree waste branches, and tree sawdust are in a ratio of 1:1:1, and the stalks are cotton stalks, wheat stalks, and corn stalks to produce powdered activated carbon. Such as activated carbon for sugar, activated carbon for injection, activated carbon for pharmaceuticals, monosodium glutamate decolorization, medicinal activated carbon, reagent activated carbon, etc. Through practical research, the combination of phosphoric acid activation method and physical method can also produce granular activated carbon.

[0105] 1. Production of powdered activated carbon by phosphoric acid method

[0106] 1.1 Process flow

[0107] The process flow for producing powdered activated carbon is shown in the appendix Figure 1~3 Generally, it includes three parts: pretreatment, carbonization a...

Embodiment 2

[0171] Example 2: Production of activated carbon by straw environmental protection physical and chemical combination method

[0172] In this example, an activated carbon sample with better performance was developed by using crop straw (mixed) as raw material, using potassium hydroxide as an activator, and through acid pretreatment and steam activation. Experiments show that the optimum temperature for activity is 750°C-800°C, the optimum heating rate is 5°C / min-10°C / min, and the optimal dosage of activator is 1:1 (mass ratio of raw material to activator). The iodine adsorption value of the activated carbon sample is 980mg / g, and the specific surface area is 1180m 2 / g. At the same time, the activation mechanism of KOH was discussed. The wide application of activated carbon makes the development of activated carbon have certain significance. One of the main research directions of straw activated carbon.

[0173] Different types of crop straw have different basic structural ...

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Abstract

The present invention discloses the active carbon producing process with mixed stalk material. The mixed stalk material of crop stalk, waste fruit branch and sawdust is produced into powdered or granular active carbon via phosphoric acid process and combined physical process. Or, the mixed stalk material is produced into powdered or granular active carbon in a chemical physical process with potassium hydroxide as activating agent and perchloric acid for pre-treatment of the material. The present invention has small investment scale, low cost, high utility and simple operation, and the product may be used widely.

Description

technical field [0001] The invention relates to the production technology of activated carbon, in particular to a method for producing activated carbon with straw mixed raw materials. Background technique [0002] Activated carbon is a black porous solid, and its biggest feature is that it has well-developed pores, large specific surface area and adsorption capacity. The following briefly introduces the relevant information on activated carbon at home and abroad: [0003] 1. Physical and chemical properties of activated carbon: [0004] Activated carbon is composed of microcrystalline carbon and amorphous carbon, contains varying amounts of ash, and is a black porous solid. Its biggest feature is that it has well-developed pores, large specific surface area and adsorption capacity. For example, the specific surface area of ​​charcoal is generally only 100m 2 / g~400m 2 / g, while the specific surface area of ​​activated carbon is as high as 1000m 2 / g~3000m 2 / g. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 杜健王俊峰杜瑾史林常宗堂贾涛李宝来王成
Owner NORTHWEST A & F UNIV
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