Ammonification method of polyacrylonitrile polymerization liquid and device for realizing same
A technology of polyacrylonitrile and polymerization solution, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of difficulty in stably controlling the degree of ammoniation of PAN polymerization solution, affecting the quality stability of PAN precursor, and difficulty in obtaining PAN polymerization solution. , to overcome the difficulty of measuring ammonia gas, improve controllability and uniformity, and achieve the effect of simple structure
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Embodiment 1
[0031] DMSO is input in the spray tower 1, and the ammonia gas in the ammonia cylinder 2 is passed into the spray tower 1 to obtain NH 3 The mass percent concentration is 1% NH 3 / DMSO dilute solution;
[0032]DMSO is used as a solvent, azobisisobutyl is used as an initiator, and acrylonitrile and itaconic acid are used as comonomers (wherein, itaconic acid accounts for 1% by mass of the total monomers) and reacted in a polymerization tank 3 for 20 hours to prepare A PAN / DMSO polymer solution with a solid content of 19% was obtained;
[0033] Use the first metering gear pump 4 and the second metering gear pump 5 to separate the PAN / DMSO polymerization liquid in the polymerization kettle 3 and the NH in the spray tower 1 3 / DMSO dilute solution is delivered in the static mixer 6, the two are mixed evenly;
[0034] The mixed material directly enters the single-removal tank to remove unreacted acrylonitrile and soluble ammonia; finally, the material is transported to the defoa...
Embodiment 2
[0040] DMSO is input into the spray tower 1, and the ammonia gas in the ammonia cylinder 2 is passed into the spray tower 1 to obtain NH 3 The mass percent concentration is 1% NH 3 / DMSO dilute solution;
[0041] DMSO is used as a solvent, azobisisobutyl is used as an initiator, and acrylonitrile and itaconic acid are used as comonomers (wherein, itaconic acid accounts for 1% by mass of the total monomers) and reacted in a polymerization tank 3 for 20 hours to prepare To obtain a PAN / DMSO polymerization solution with a solid mass percent content of 20%;
[0042] Use the first metering gear pump 4 and the second metering gear pump 5 to separate the PAN / DMSO polymerization liquid in the polymerization kettle 3 and the NH in the spray tower 1 3 / DMSO dilute solution is delivered in the static mixer 6, the two are mixed evenly;
[0043] The mixed material directly enters the single-removal tank to remove unreacted acrylonitrile and soluble ammonia; finally, the material is tran...
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