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Oil stain adsorbent and preparation method thereof

An adsorbent, oil pollution technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of difficult to remove oil pollution, without considering the effect of adsorbing emulsified oil to absorb oil pollution, etc.

Pending Publication Date: 2021-08-31
董鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These oil stains can no longer be removed by mechanical and other physical means, and are dispersed in water in the form of emulsified oil during the removal process by mechanical and other physical means, making the remaining oil stains difficult to remove
[0003] The existing adsorbents only make a fuss about the adsorption capacity, without considering the effect of absorbing oil pollution brought about by the lipophilicity when absorbing emulsified oil. If an adsorbent with lipophilic properties can be prepared, it will be very promising. of

Method used

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  • Oil stain adsorbent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] A kind of oil stain adsorbent, in parts by weight, mainly comprises:

[0030] 1 part of modified activated carbon, 2 parts of modified chitosan;

[0031] A kind of preparation of oil stain adsorbent, described oil stain adsorbent preparation method is:

[0032] (1) Mix the carbonaceous material and the calcium-aluminum hydrotalcite evenly according to the mass ratio of 8:1, make the mixture and carry out ball milling in a ball mill for 1.5 hours, and pass through a 100-mesh sieve;

[0033] (2) Add coal tar of 0.125 times the mass of the mixed material to the mixed material after sieving, and press to form after stirring evenly to obtain an adsorbent blank;

[0034] (3) Preliminarily activate the adsorbent blank in a closed environment at a temperature of 850° C., and measure the pressure of the closed environment at the same time until the pressure in the closed environment is stable, and obtain the initially activated adsorbent matrix;

[0035] (4) Immediately transf...

Embodiment 2

[0039] A kind of oil stain adsorbent, in parts by weight, mainly comprises:

[0040] 1 part of modified activated carbon, 2 parts of modified chitosan;

[0041] A kind of preparation of oil stain adsorbent, described oil stain adsorbent preparation method is:

[0042] (1) Mix the carbonaceous material and the calcium-aluminum hydrotalcite evenly according to the mass ratio of 10:1, make a mixture and carry out ball milling in a ball mill for 3 hours, and pass through a 100-mesh sieve;

[0043] (2) Add coal tar of 0.1 times the mass of the mixture to the sieved mixture, stir evenly and press to form an adsorbent blank;

[0044] (3) Preliminarily activate the adsorbent blank in a closed environment at a temperature of 1100° C., and measure the pressure of the closed environment at the same time until the pressure in the closed environment is stable, and obtain the initially activated adsorbent matrix;

[0045] (4) Immediately transfer the adsorbent matrix to a potassium carbon...

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Abstract

The invention discloses an oil stain adsorbent and a preparation method thereof, and relates to the technical field of adsorbents. When the oil stain adsorbent is prepared, modified activated carbon is firstly prepared, a carbonaceous material and hydrotalcite are mixed, pressed and molded and then preliminarily activated under a sealed condition, when the pressure in a sealed space is not changed, the mixture is immediately transferred into a potassium carbonate solution, slow cooling and ventilation are carried out in a pressure-variable sealed container, and secondary carbon activation is performed in the atmosphere of circulating airflow. The process steps are simplified, the specific surface area of the product is increased, no potassium hydroxide residue is generated, the activation is more sufficient, and the modified activated carbon with higher specific surface area and porosity is formed. The modified activated carbon is soaked in a modified chitosan solution for heat preservation, and drying and blowing are performed after a period of time to obtain the oil stain adsorbent. The oil stain adsorbent prepared by the preparation method disclosed by the invention not only has improved lipophilicity, but also has relatively strong adsorption capacity.

Description

technical field [0001] The invention relates to the technical field of adsorbents, in particular to an oil dirt adsorbent and a preparation method thereof. Background technique [0002] When oil and water are separated, when the oil content in the water body is large, most of the oil stains in the water body can be removed by mechanical separation technology, but there is still a small amount of oil stains remaining in the water body. These oil stains can no longer be removed by mechanical and other physical means, and are dispersed in water in the form of emulsified oil during the removal process by mechanical and other physical means, making it difficult to remove the remaining oil stains. [0003] The existing adsorbents only make a fuss about the adsorption capacity, without considering the effect of absorbing oil pollution brought about by the lipophilicity when absorbing emulsified oil. If an adsorbent with lipophilic properties can be prepared, it will be very promisi...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J20/20B01J20/041B01J20/08B01J20/22C02F1/288
Inventor 董鹏
Owner 董鹏
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