A kind of preparation method of ultrafine lignin
A lignin and ultra-fine technology, applied in the field of preparation of ultra-fine lignin, can solve the problems of low production efficiency and high cost, and achieve the effects of improving production efficiency, improving performance and satisfying market demand.
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Embodiment 1
[0031] Step (1): 120-mesh lignin and 325-mesh grinding aid aluminum hydroxide are mixed and stirred evenly in a weight ratio of 30:5;
[0032] Step (2): The mixture obtained in step (1) and 0.8MPa compressed air are simultaneously injected into the jet mill to obtain pulverized materials;
[0033] Step (3): Putting the pulverized material obtained in step (2) into a classifier or a classifying chamber for classifying, the classifying speed is 8000r / min, and the classified particles are obtained;
[0034] Step (4): For the classified particles obtained in step (3), return the particles with a particle size of <4000 mesh to the airflow mill for re-grinding, and discharge the particles with a particle size of ≥4000 mesh from the discharge port, which is the ultrafine Lignin.
[0035] Various parameters for preparing ultrafine lignin are shown in Table 1.
Embodiment 2
[0037] Step (1): 120-mesh lignin and 325-mesh grinding aid aluminum hydroxide are mixed and stirred evenly in a weight ratio of 20:5;
[0038] Step (2): The mixture obtained in step (1) and 0.8MPa compressed air are simultaneously injected into the jet mill to obtain pulverized materials;
[0039] Step (3): Putting the pulverized material obtained in step (2) into a classifier or a classifying chamber for classifying, the classifying speed is 8000r / min, and the classified particles are obtained;
[0040] Step (4): For the classified particles obtained in step (3), return the particles with a particle size of <4000 mesh to the airflow mill for re-grinding, and discharge the particles with a particle size of ≥4000 mesh from the discharge port, which is the ultrafine Lignin.
[0041] Various parameters for preparing ultrafine lignin are shown in Table 1.
Embodiment 3
[0043] Step (1): 120-mesh lignin and 325-mesh grinding aid aluminum hydroxide are mixed and stirred evenly in a weight ratio of 10:5;
[0044] Step (2): The mixture obtained in step (1) and 0.8MPa compressed air are simultaneously injected into the jet mill to obtain pulverized materials;
[0045] Step (3): Putting the pulverized material obtained in step (2) into a classifier or a classifying chamber for classifying, the classifying speed is 8000r / min, and the classified particles are obtained;
[0046] Step (4): For the classified particles obtained in step (3), return the particles with a particle size of <4000 mesh to the airflow mill for re-grinding, and discharge the particles with a particle size of ≥4000 mesh from the discharge port, which is the ultrafine Lignin.
[0047] Various parameters for preparing ultrafine lignin are shown in Table 1.
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