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Benzene protective activated carbon and preparation method thereof

A technology of activated carbon and carbonization, which is applied in the field of materials, can solve the problems of strict product index requirements and high production costs, and achieve the effects of increasing added value and economic benefits, ensuring strength, and improving benzene adsorption capacity

Inactive Publication Date: 2020-06-02
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional water purification charcoal belongs to liquid-phase adsorption charcoal, which is generally prepared by blending low-ash anthracite or coal with low ash content. The market has strict requirements on product indicators, and its preparation cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) kneading layer

[0066] The Heishan coal with a volatile content of 30.5wt% and an ash content of 7wt% and the Taixi anthracite coal with a volatile content of 8.6wt% and an ash content of 7wt% were pulverized until D90<75μm; 1200g of Heishan coal powder and 1800g of Taixi anthracite coal powder Mix, the volatile content of the obtained 3000g raw coal is 17.5wt%; add 700g coal tar, 300g sodium hydroxymethyl cellulose and 600g water to the obtained 3000g raw coal, then knead in a biaxial stirring kneader at 70°C for 15min Obtain coal paste, and then extrude the gained coal paste into charcoal strips on a hydraulic molding machine;

[0067] (2) Carbonization

[0068] Step (1) the obtained charcoal strips were dried and solidified for 48 hours, then entered into a carbonization furnace and carried out carbonization treatment at 600°C for 25 minutes in the anaerobic state, to obtain a carbonized material with a volatile content of 8 wt%.

[0069] (3) activation

[00...

Embodiment 2

[0073] (1) kneading layer

[0074] The Heishan coal with a volatile content of 28.7wt% and an ash content of 8wt% and the Taixi anthracite coal with a volatile content of 9.1wt% and an ash content of 4wt% were pulverized until D90<75μm; 1500g of Heishan coal powder and 1500g of Taixi anthracite coal were used for Mix, the volatile matter of gained 3000g raw coal is 19.1wt%; Add 450g coal tar, 300g hydroxymethyl cellulose sodium and 937.5g water in gained 3000g raw coal, then knead at 80 ℃ in the biaxial stirring kneader 10min to get coal paste, then extrude the gained coal paste into charcoal strips on a hydraulic molding machine;

[0075] (2) Carbonization

[0076] Step (1) the obtained charcoal strips are air-dried and solidified for 24 hours, and then enter a carbonization furnace to carry out carbonization treatment at 650° C. for 30 minutes in anaerobic state to obtain a carbonized material with a volatile content of 6 wt %;

[0077] (3) activation

[0078] Send the ca...

Embodiment 3

[0081] (1) kneading layer

[0082] The Heishan coal with a volatile content of 25.8wt% and an ash content of 6wt% and the Taixi anthracite coal with a volatile content of 7.9wt% and an ash content of 3wt% were pulverized until D90<75μm; 600g of Heishan coal powder and 2400g of Taixi anthracite coal were used for Mix, the volatile matter of gained 3000g raw coal is 11.8wt%; In gained 3000g raw coal, add 1029g coal tar, 257g hydroxymethyl cellulose sodium and 428.6g water, then knead at 80 ℃ in the biaxial stirring kneader 10min to get coal paste, then extrude the gained coal paste into charcoal strips on a hydraulic molding machine;

[0083] (2) Carbonization

[0084] Step (1) the obtained charcoal strips were air-dried and solidified for 36 hours, and then entered into a carbonization furnace to carry out carbonization treatment at 550° C. for 40 minutes in anaerobic state to obtain a carbonized material with a volatile content of 7 wt %;

[0085] (3) activation

[0086] Se...

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Abstract

The invention provides benzene protective activated carbon and a preparation method thereof. The preparation raw materials comprise the following substances by weight: 70-80 parts of feed coal and 20-30 parts of a binder; wherein the feed coal comprises first feed coal and second feed coal; the first feed coal is bituminous coal, the volatile content is 24-35wt%, and the ash content is less than 10wt%; the second feed coal is anthracite, the volatile content is 5-10wt%, and the ash content is less than 6wt%; and in the feed coal, the content of the second feed coal is 50-80wt%; the volatile content of the feed coal is 10-20wt%; the binder comprises coal tar and a solid binder, and the solid binder at least comprises carboxymethyl cellulose sodium; and in the binder, the content of the solid binder is 20-40wt%. The preparation method comprises the following steps of: kneading and pressing into strips, charring and activation. On the basis of ensuring the strength, the benzene adsorptionvalue of the benzene protective activated carbon is high; the preparation method is simple and easy to operate, and the prepared product is high in strength and benzene adsorption value.

Description

technical field [0001] The invention belongs to the field of materials, in particular to benzene protective activated carbon and a preparation method thereof. Background technique [0002] With the development of industry, the emission of organic waste gas has increased rapidly, and industries such as coating, printing, insulating materials, enameled wire, resin processing, and leather processing have emitted a large amount of multi-component organic waste gas containing benzene and toluene. The recovery of organic waste gas benzene in chemical production is a major problem faced by the chemical industry at present. After benzene vapor is discharged into the atmosphere, it will lead to a decline in the quality of the atmospheric environment, causing serious harm to human health and causing huge losses to the national economy. In the national environmental protection standard, benzene is regarded as a harmful substance, and its concentration in the air is strictly limited. ...

Claims

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Application Information

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IPC IPC(8): C01B32/336C01B32/318B01J20/20B01J20/30B01D53/02
CPCC01B32/336C01B32/318B01J20/20B01D53/02B01J2220/4806B01J2220/4812B01D2253/102B01D2257/7027
Inventor 李静伟贺彬艳杨光明
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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