Rock asphalt based demercuration adsorbent and preparation method thereof
A technology of rock asphalt and adsorbent, which is applied in the field of rock asphalt-based mercury removal adsorbent and its preparation, can solve environmental pollution and other problems, and achieve the effects of good adsorption, high-efficiency removal, and complete grain development
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[0030] The preparation method of rock asphalt-based mercury-removing sorbent of the present invention comprises the following steps:
[0031] Step 1, the washing of rock asphalt, the operation steps are as follows:
[0032] Step 1.1. Heating the rock asphalt raw material to 300-600°C, then adding water, carrying out hydrothermal reaction treatment, and drying by blasting at 105°C for 10 hours to remove water, to obtain hydrothermal rock asphalt;
[0033] Step 1.2, adding hydrothermal rock asphalt into n-pentane, stirring magnetically for 30-40 minutes, and suctioning with 20-25 μm filter paper, the ratio of n-pentane to rock asphalt powder is (5-8):1;
[0034] Step 1.3, add the residual solid matter after suction filtration in the previous step into n-pentane, stir magnetically for 30-40 minutes, and suction-filter with 8 μm filter paper, the ratio of n-pentane to raw rock asphalt powder is (5-8):1;
[0035] Step 1.4: Add the residue after suction filtration in the previous s...
Embodiment 1
[0049] The KOH solid is ground and passed through a 200-mesh sieve, and the KOH and the washed asphaltene particles are mechanically mixed at a ratio of 0.5:1. The mixture was placed in the center of the tube furnace for carbonization, and 99.9% N 2 , at N 2 Under the atmosphere, the heating rate is 4°C / min, the carbonization temperature is 350°C, and the carbonization time after reaching the carbonization temperature is 0.5h. , to obtain a mercury-removing adsorbent containing rock asphalt base and KOH, K 2 CO 3 with K 2 O mixture. Dissolve the mixture in water, keep the water bath at 90°C for 2 hours, and add 3mol / L HNO dropwise 3 Mix and stir, add dropwise until the solution becomes strongly acidic (pH test paper turns deep red), and stabilize for 1 min. Use a vacuum pump to add UP water to filter the mixed solution, and check the pH value of the filtrate. If the pH value is 7, take out the residue and air-dry it at 80°C for 12 hours to obtain the rock asphalt-based m...
Embodiment 2
[0052] The KOH solid is pulverized through a 200-mesh sieve, and the KOH and the washed asphaltene particles are mechanically mixed at a ratio of 1:1. The mixture was placed in the center of the tube furnace for carbonization, and 99.9% N 2 , at N 2 Under the atmosphere, the heating rate is 8°C / min, the carbonization temperature is 400°C, and the carbonization time after reaching the carbonization temperature is 1h. Contains rock asphalt-based mercury removal adsorbent and KOH, K 2 CO 3 with K 2 O mixture. Dissolve the mixture in water, keep the water bath at 90°C for 2 hours, and add 3mol / L HNO dropwise 3 Mix and stir, add dropwise until the solution becomes strongly acidic (pH test paper turns deep red), and stabilize for 1 min. Use a vacuum pump to add UP water to filter the mixed solution, and check the pH value of the filtrate. If the pH value is 7, take out the residue and air-dry it at 80°C for 12 hours to obtain the rock asphalt-based mercury adsorbent; if the pH...
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