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Activated carbon for water purification

A technology for activated carbon and water purification, applied in the field of activated carbon for water purification, can solve the problems of low yield of activated carbon products and high production cost, and achieve the effects of low cost, good mechanical strength and improved yield

Active Publication Date: 2019-07-30
LIYANG ZHUXI ACTIVATED CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a renewable resource, straw is the first choice for making activated carbon, but the yield of activated carbon products is low and the production cost is high

Method used

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  • Activated carbon for water purification

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Experimental program
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Effect test

Embodiment 1

[0021] In the embodiment of the present invention, activated carbon for water purification is made through the following steps:

[0022] 1) After the straw is dried, it is crushed and sieved to 10 mesh, and mixed evenly; it is preliminarily carbonized in a microwave pyrolysis reactor to obtain a pretreated material; the microwave power is 1000W, and the initial carbonization time is 3 minutes.

[0023] 2) Soak the pretreatment material in 15wt.% hydrochloric acid solution for 3 hours, the soaking temperature is 45°C, stir while soaking, the stirring speed is 150r / min; the mass ratio of pretreatment material to 15wt.% hydrochloric acid solution is 1:2 . Then soak in 15wt.% sodium hydroxide solution for 1h, soaking temperature is 75°C, stir while soaking, stirring speed is 150r / min; the mass ratio of pretreatment material and 15wt.% sodium hydroxide solution is 1:2 . Wash with deionized water repeatedly until neutral, and dry at 90°C to obtain a semi-finished product.

[0024...

Embodiment 2

[0026] In the embodiment of the present invention, activated carbon for water purification is made through the following steps:

[0027] 1) After the straw is dried, it is crushed and sieved to 60 mesh, and mixed evenly; it is preliminarily carbonized in a microwave pyrolysis reactor to obtain a pretreated material; the microwave power is 1500W, and the initial carbonization time is 15 minutes.

[0028] 2) Soak the pretreatment material in 35wt.% hydrochloric acid solution for 20h, the soaking temperature is 60°C, stir while soaking, the stirring speed is 300r / min; the mass ratio of pretreatment material to 35wt.% hydrochloric acid solution is 1:3 . Then soak in 30wt.% sodium hydroxide solution for 5h, the soaking temperature is 100°C, stir while soaking, the stirring speed is 300r / min; the mass ratio of pretreatment material and 30wt.% sodium hydroxide solution is 1:4 . Wash with deionized water repeatedly until neutral, and dry at 100°C to obtain a semi-finished product. ...

Embodiment 3

[0031] In the embodiment of the present invention, activated carbon for water purification is made through the following steps:

[0032] 1) After the straw is dried, it is crushed and sieved to 20 mesh, and mixed evenly; it is preliminarily carbonized in a microwave pyrolysis reactor to obtain a pretreated material; the microwave power is 1200W, and the initial carbonization time is 5 minutes.

[0033] 2) Soak the pretreatment material in 20wt.% hydrochloric acid solution for 5 hours, the soaking temperature is 50°C, stir while soaking, the stirring speed is 200r / min; the mass ratio of pretreatment material to 20wt.% hydrochloric acid solution is 1:2.3 . Then soak in 20wt.% sodium hydroxide solution for 2h, the soaking temperature is 80°C, stir while soaking, the stirring speed is 200r / min; the mass ratio of pretreatment material and 20wt.% sodium hydroxide solution is 1:2.5 . Wash with deionized water repeatedly until neutral, and dry at 95°C to obtain a semi-finished produ...

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Abstract

The invention discloses active carbon for water purification. A preparation method of the active carbon comprises the following steps: drying a straw, performing crushing and 10-60-mesh sieving, performing uniform mixing, performing preliminary carbonization for 3-15min at microwave power of 1000-1500W in a microwave cracking reaction furnace to obtain a pretreated material, soaking the pretreated material for 3-20h in 15-35wt.% of hydrochloric acid solution, soaking the pretreated material for 1-5h in 15-30wt.% of sodium hydroxide solution, performing repeated washing with deionized water to be neutral, performing drying to obtain a semifinished product, performing insulation treatment for 0.5-2h on the semifinished product in a 380-420 DEG C muffle furnace, and then performing cooling to a room temperature to obtain the active carbon. The prepared active carbon product has the characteristics of high adsorption capacity, good mechanical strength, high bulk specific weight and the like; a yield of the product is increased; the cost of the product is lowered; a resource utilization rate is high; the active carbon product is suitable for mass production, is applicable to deep purification of drinking water, and reaches a superior grade in an international similar product.

Description

technical field [0001] The invention relates to the technical field of environmental protection materials, in particular to activated carbon for water purification. Background technique [0002] my country is currently one of the 13 countries with the poorest water in the world. According to the latest "China Environmental Performance Evaluation" report released by the Organization for Economic Cooperation and Development, more than 75% of the water flowing through Chinese cities is not suitable for drinking, and more than 30% The water quality of the detected river belongs to the inferior V category. With the development of industry, the degree of pollution of urban drinking water sources is increasing. At the same time, with the improvement of living standards, people's requirements for drinking water quality and drinking water quality standards are becoming more and more stringent. [0003] Due to its large specific surface area and developed pore structure, activated car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324
Inventor 陈静陈娴吕震龙卞建平
Owner LIYANG ZHUXI ACTIVATED CARBON
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