Preparation method of mizue brocade straw activated charcoal

A technology of straw activated carbon and water branch brocade, which is applied in the field of preparation of activated carbon, can solve the problems of unsatisfactory adsorption effect of activated carbon, difficulty in centralized collection of fruit shells, and limitation of activated carbon raw materials, and achieve the effect of low price, easy production and large pore volume

Inactive Publication Date: 2008-01-30

SHANDONG UNIV

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AI-Extracted Technical Summary

Problems solved by technology

[0002] At present, the raw materials for the preparation of activated carbon are mostly wood, wood chips, coconut shells, fruit cores, etc. Due to the reduction of sources of wood, etc., it is difficult to collect the fruit shells in a centralized manner, which greatly limits the raw materials for the pre...

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Abstract

The invention provides a method for preparing loosestrife straw active carbon, comprising the steps that: 1. the loosestrife straw is dried and crumbled into fractions so as to be able to get through a 70 to 100 mesh sieve; 2. the loosestrife straw is steeped for 3 to 4 hours in phosphoric acid with 50 percent to 70 percent density at a dipping ratio of 2.5:1; 3. the loosestrife straw is put into an activating oven for carbonization and activation with the activation temperature of 450 DEG C to 500 DEG C for 1.5 to 2.5 hours, or the carbonization and activation are carried out in a microwave oven with the protection of nitrogen, the power of the microwave is 1000W and the microwave radiation time is 7 to 8 minutes; 4. then washing with water is carried out until getting a neutral status; finally, drying under 105 DEG C is carried out so as to obtain the loosestrife straw active carbon. The invention takes the loosestrife with a wide source as the raw material, thereby being easy to be operated and environment protective with low cost, and compared with active carbon prepared with other raw materials, the invention is characterized by a plurality of pore canals, good absorbability performance, larger surface area and more pore volume.

Technology Topic

Percent densityPhosphoric acid +10

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Examples

Experimental program(1)

Example Embodiment

[0011] As shown in the process flow chart of the present invention given in the drawings. Dry the Shuizhijin stalks naturally or at 105℃±5℃, and use a grinder to coarsely and moderately crush them to pass through a 70-100 mesh sieve; then put the raw materials into the tank in batches and use Phosphoric acid with a concentration of 50%-70% is soaked with a mass ratio of 2.5:1, and the soaking time is 3-4 hours; then it is placed in an activation furnace for carbonization and activation. The activation temperature is 450°C-500°C, and the activation time For 1.5-2.5 hours, or use nitrogen as protective gas in a microwave oven for carbonization and activation, the microwave power should be 1000W, and the microwave irradiation time should be 7-8min; then wash with water, concentrate the first washing liquid, and recover phosphoric acid , For reuse; wash at least three times with multi-stage countercurrent water, wash with clean water the last time, until the washing is neutral, the pH is between 6.5-7; finally, dry at 105℃±5℃, and pack it. Activated carbon with large specific surface area and good adsorption performance.

[0012] The invention has the following advantages

[0013] (1) The raw materials used in the present invention have a wide range of easy-to-obtain sources, which belong to waste utilization and reduce the production cost.

[0014] (2) Compared with activated carbon prepared from other raw materials, it has more pores and good adsorption performance.

[0015] (3) The process of preparing activated carbon from this raw material is environmentally friendly and does not cause environmental pollution.

[0016] (4) The activated carbon made from this raw material has the characteristics of larger specific surface area and more pore volume.

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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