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Modified clay adsorbent and preparation method and application thereof

An adsorbent and clay technology, which is applied in the field of modified clay adsorbent and its preparation, can solve problems such as poor effect, and achieve the effects of simple process, easy popularization and use in a large range, and low cost.

Inactive Publication Date: 2017-03-08
HENAN SHUIJINGTOU CULTURAL MEDIA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is rarely used in the field of mercury removal, and some are formulated with other materials with excellent mercury removal, and the effect of clay alone is extremely poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the embodiment of the present invention, a modified clay adsorbent is composed of the following raw materials in parts by weight: 34 parts of clay, 2 parts of plain O, 5 parts of salicylic acid, and 13 parts of dipropylene glycol.

[0019] Dipropylene glycol is mixed with 7.8 times the mass of deionized water to prepare a dipropylene glycol solution. Mix and grind the clay with Pingping O, pass through a 120-mesh sieve, then add the dipropylene glycol solution, heat up to 77°C and seal and stir at this temperature for 1.3h, then heat up to 92°C and add salicylic acid dropwise. After the addition is complete Stir at this temperature for 10 minutes, then reduce to 65°C and ultrasonically treat for 45 minutes with an ultrasonic power of 800W, then stir to dryness at a temperature of 99°C, and then calcinate in a muffle furnace at 450°C for 4.1 hours to obtain the adsorbent.

Embodiment 2

[0021] In the embodiment of the present invention, a modified clay adsorbent is composed of the following raw materials in parts by weight: 42 parts of clay, 6 parts of plain O, 13 parts of salicylic acid, and 21 parts of dipropylene glycol.

[0022] Dipropylene glycol is mixed with 7.8 times the mass of deionized water to prepare a dipropylene glycol solution. Mix and grind the clay with Pingping O, pass through a 120-mesh sieve, then add the dipropylene glycol solution, heat up to 77°C and seal and stir at this temperature for 1.3h, then heat up to 92°C and add salicylic acid dropwise. After the addition is complete Stir at this temperature for 10 minutes, then reduce to 65°C and ultrasonically treat for 45 minutes, with an ultrasonic power of 800W, and then stir to dryness at a temperature of 101°C, and then calcinate in a muffle furnace at 450°C for 4.1 hours to obtain the adsorbent.

Embodiment 3

[0024] In the embodiment of the present invention, a modified clay adsorbent is composed of the following raw materials in parts by weight: 36 parts of clay, 3 parts of plain O, 7 parts of salicylic acid, and 15 parts of dipropylene glycol.

[0025] Dipropylene glycol is mixed with 7.8 times the mass of deionized water to prepare a dipropylene glycol solution. Mix and grind the clay with Pingping O, pass through a 120-mesh sieve, then add the dipropylene glycol solution, heat up to 77°C and seal and stir at this temperature for 1.3h, then heat up to 92°C and add salicylic acid dropwise. After the addition is complete Stir at this temperature for 10 minutes, then drop to 65°C and ultrasonically treat for 45 minutes with an ultrasonic power of 800W, then stir to dryness at a temperature of 100°C, and then calcinate in a muffle furnace at 450°C for 4.1 hours to obtain the adsorbent.

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PUM

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Abstract

The invention discloses a modified clay adsorbent and a preparation method and application thereof. The adsorbent consists of the following raw materials in parts by weight: 34-42 parts of clay, 2-6 parts of peregal O, 5-13 parts of salicylic acid and 13-21 parts of dipropylene glycol. The preparation method comprises the following steps: mixing and grinding the clay and the peregal O; then adding a dipropylene glycol solution; heating and stirring in a sealed manner, heating and dropwise adding the salicylic acid; after cooling, carrying out ultrasonic treatment; and stirring until the component is dry, and then calcining at high temperature to obtain the absorbent. The clay and the peregal O are mixed and ground, after the mixture is treated by the dipropylene glycol and the salicylic acid, the absorbent is prepared, the specific surface area is promoted to be increased, the modified clay adsorbent is applied to mercury treatment of flue gas, and the mercury removal efficiency is greatly improved and reaches 95% or above. The modified clay adsorbent is simple in process, short in technological process and low in cost, is conveniently popularized and used in a large range, and can be reused; and the mercury removal costs can be greatly reduced.

Description

Technical field [0001] The invention relates to the technical field of air pollution control, in particular to a modified clay adsorbent and a preparation method and application thereof. Background technique [0002] Coal is the most important energy source for the entire industry. The pollutants produced by coal combustion are in addition to SO and NO. x And CO 2 In addition, there are various forms of mercury, a large amount of mercury released into the atmosphere causes direct or potential harm to human health. The average mass fraction of mercury in coal in China is 0.22mg / kg. Due to the massive combustion of coal, the total amount of mercury that escapes from burning coal reaches more than 1,590 t each year, accounting for about 50% of the world's total. In the combustion process of coal, the high temperature gasifies the mercury in the coal into gaseous mercury (Hg 0 ), with the cooling of the combustion gas and the interaction of gaseous mercury with other combustion prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30B01D53/02
CPCB01J20/12B01D53/02B01D2257/602
Inventor 不公告发明人
Owner HENAN SHUIJINGTOU CULTURAL MEDIA CO LTD
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