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Method for making wooden quality granule shape activated char used in recovering solvent

A technology of wood pellets and manufacturing methods, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low adsorption and desorption indicators of wood granular activated carbon, etc.

Inactive Publication Date: 2002-12-18
郑国炉
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Problems solved by technology

Page 12, page 13, page 14, page 17, page 23, page 150) The problem is that the above method can only produce woody granular activated carbon with low adsorption and desorption indicators

Method used

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Examples

Experimental program
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Embodiment Construction

[0013] The first way:

[0014] Take dry hardwood chips, the water content is below 25%, and take the particle size of 8-20 meshes after screening. Soak in Baume 40°C phosphoric acid solution, slowly raise the temperature to 180°C for about 10 hours. Take out the acid material and knead in the kneader, then add some lignosulfonate (acidified) and activated carbon powder. The ratio of the above three substances: sawdust, lignin, and charcoal powder is 1:1:1, that is, each one-third. After kneading, it is continuously extruded in a screw extruder, and the plywood is dried and put into a rotary kiln for carbonization and activation, and then the phosphoric acid solution is washed out, other mixtures are removed, dried, and screened to obtain the product.

[0015] Product quality: Ф diameter: 0.2mm Benzene adsorption rate%: 104.5

[0016] Iodine mg / g: 961.9 Strength %: 92.6

[0017] Butane adsorption %: 36.9

[0018] The second way:

[0019] Take dried...

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Abstract

The present invention belongs to a production technique of active carbon by using saw dust or discards of farm and forest products as raw material, and said production technique incldues the following steps: soaking raw material by using activating agent phosphoric acid soaking temp. is 100-200 deg.C, and the concentration of activating agent is 30 Be-60Be, after the raw material is softened and stickability-produced, kneading and extruding to obtain granular semi-finished product, then making the semi-finished product undergo the convertional processes of drying, carbonizing, chemical activating, recovering activating agent, removing impurity, drying, screening and packaging so as to obtain the invneted end product.

Description

technical field [0001] The invention relates to a manufacturing method of activated carbon for wood granular solvent recovery, which relates to the technical field of inorganic chemistry, and in particular belongs to a manufacturing technology of activated carbon, which includes the use of active agents and granulation molding. Background technique [0002] Almost all carbonaceous materials can be used to produce activated carbon, such as wood activated carbon, shell activated carbon and coal activated carbon. The key process of manufacturing activated carbon is activation. Due to the different activators used, it can be divided into chemical activation methods using zinc chloride or phosphoric acid as activators, and another type of activation using water vapor or carbon dioxide. Gas activation method. The former can be referred to as the chemical activation method, and the latter is also referred to as the physical activation method. These two types of activation processe...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/342C01B32/348C01B32/384
Inventor 郑国炉
Owner 郑国炉
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