Powdered activated carbon (PAC) modified bentonite, preparation method and application of PAC modified bentonite as well as green-liquor desilication method
A modified technology of bentonite, which is applied in the field of papermaking industry, can solve problems affecting the evaporation of black liquor, loss of raw materials in the process section, and decrease in concentration, and achieve the effects of increasing economic benefits, reducing energy consumption, and simplifying the process
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Embodiment approach 1
[0033] Dissolve 5g of bentonite in 0.5L of water, stir to form a suspension, then add 0.5g of PAC to the suspension, stir for 2 hours, take it out, let it stand for 12 hours, pour off the supernatant, and put the turbid solution into the drying box Dry for 24 hours, take out, grind, and sieve, pour 1 g of the ground and sieved powder into 100 mL of green liquid at 90 ° C, and stir for 5 min;
[0034] The measured silicon content was 2.63g / L, and the measured pH of the green liquor was 12.90.
Embodiment approach 2
[0036] Dissolve 10g of bentonite in 1L of water, stir to form a suspension, then add 1.5g of PAC to the suspension, stir for 2 hours, take it out, let it stand for 12 hours, pour off the supernatant, and put the turbid solution in a drying oven to dry for 24 hours , take it out, grind, sieve, pour 1g of the ground and sieved powder into 100mL green liquid at 90°C, and stir for 5min;
[0037] The measured silicon content was 2.01g / L, and the measured pH of the green liquor was 12.87.
Embodiment approach 3
[0039] Dissolve 20g of bentonite in 1L of water, stir to form a suspension, then add 5g of PAC to the suspension, stir for 2 hours, take it out, let it stand for 12 hours, pour off the supernatant, put the turbid solution in a drying oven to dry for 12 hours, Take out, grind and sieve, pour 1g of the ground and sieved powder into 100mL green liquid at 90°C, and stir for 5min;
[0040] The measured silicon content was 1.03g / L, and the measured pH of the green liquor was 12.83.
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