System for coproducing sulfonated coal and humic acid by using sulfuric acid
A technology for sulfonating coal and humic acid, applied in chemical instruments and methods, organic chemistry, other chemical processes, etc., can solve problems such as high production cost and environmental pollution, increase economic benefits, and solve the effect of acid-containing wastewater discharge
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Embodiment 1
[0026] The method of co-producing sulfonated coal and humic acid with sulfuric acid is as follows:
[0027] 1. Add sulfuric acid with a concentration of 50% and lignite particles with a particle size of less than 30mm into the first reaction device at a mass ratio of 2:1, stir evenly, and react for 4 hours at a temperature of 100°C;
[0028] 2. Use a solid-liquid separation device to separate the reacted substances, and the obtained solids are washed and then dried to obtain sulfonated coal;
[0029] 3. Mix the liquid obtained after solid-liquid separation with the dilute acid solution formed after washing, then add water or sulfuric acid to adjust to a sulfuric acid solution with a concentration of 10%, and mix the obtained sulfuric acid solution with lignite particles with a humic acid content of 30% Add it into the second reaction device at a mass ratio of 1:1, stir evenly, and react at a temperature of 40° C. for 30 minutes to obtain a crude humic acid mixture.
Embodiment 2
[0031] The method of co-producing sulfonated coal and humic acid with sulfuric acid is as follows:
[0032] 1. Add sulfuric acid with a concentration of 95% and lignite particles with a particle size of less than 30mm into the first reaction device at a mass ratio of 6:1, stir evenly, and react for 20 hours at a temperature of 200°C;
[0033] 2. Use a solid-liquid separation device to separate the reacted substances, and the obtained solids are washed and then dried to obtain sulfonated coal;
[0034] 3. Mix the liquid obtained after solid-liquid separation with the dilute acid solution formed after washing, then add water or sulfuric acid to adjust to a sulfuric acid solution with a concentration of 20%, and mix the obtained sulfuric acid solution with lignite particles with a humic acid content of 55% Add it into the second reaction device at a mass ratio of 2:1, stir evenly, and react at a temperature of 80° C. for 120 minutes to obtain a crude humic acid mixture.
Embodiment 3
[0036] The method of co-producing sulfonated coal and humic acid with sulfuric acid is as follows:
[0037] 1. Add sulfuric acid with a concentration of 95% and lignite particles with a particle size of less than 30mm into the first reaction device at a mass ratio of 3:1, stir evenly, and react for 15 hours at a temperature of 170°C;
[0038] 2. Use a solid-liquid separation device to separate the reacted substances, and the obtained solids are washed and then dried to obtain sulfonated coal;
[0039] 3. Mix the liquid obtained after solid-liquid separation with the dilute acid solution formed after washing, then add water or sulfuric acid to adjust to a sulfuric acid solution with a concentration of 15%, and mix the obtained sulfuric acid solution with lignite particles with a humic acid content of 65%. Add it into the second reaction device according to the mass ratio of 1.5:1, stir evenly, and react at a temperature of 70° C. for 80 minutes to obtain a crude humic acid mixt...
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