Method for removing unreacted monomers in polymer using SCC
The present invention provides a method for removing unreacted monomer in polymer using a SCC comprising a housing having a rotation axis; a supply part of at least one polymer formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move polymer supplied through the polymer supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving polymer from a spinning cone at the upper part to a spinning cone at the lower part; a product collection part for collecting polymer moved through the spinning cone and the fixed cone; and a driving part for rotating the spinning cone. The method for removing unreacted monomers in polymer using SCC according to the present invention may control polymer residence time and thus does not lower polymer stability even under high temperature condition, and has high area density and thus has excellent unreacted monomer removal efficiency without using steam and the like, or with a small amount of steam, and the like.
1. A method for removing unreacted monomers in polymer using a SCC (spinning cone column) comprising
a housing having a rotation axis;
a supply part of at least one polymer formed inside of the housing;
at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move polymer supplied through the polymer supply part, and rotate around the rotation axis;
a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving polymer from a spinning cone at the upper part to a spinning cone at the lower part;
a product collection part for collecting polymer moved through the spinning cone and the fixed cone; and
a driving part for rotating the spinning cone.
2. The method for removing unreacted monomers in polymer using a SCC according to claim 1 , wherein 2 to 40 spinning cones are arranged from the upper part to the lower part around the rotation axis.
3. The method for removing unreacted monomers in polymer using a SCC according to claim 1 , wherein the spinning cones rotate around the same rotation axis at a rotation speed where G according to the following Equation 1 becomes 1 to 100 times
G
=
r
(
2
π
×
R
P
M
60
)
2
9.8
[
Equation
1
]
wherein, G is a multiple of gravitational acceleration, r is radius(m) of the cone, and RPM is a rotation speed (times/min).
4. The method for removing unreacted monomers in polymer using a SCC according to claim 1 , wherein the spinning cone is equipped with a heater and a temperature control means inside.
5. The method for removing unreacted monomers in polymer using a SCC according to claim 1 , wherein the SCC is equipped with a heater and a temperature control means for progressing a reaction on the outer wall or inner wall of the housing.
6. The method for removing unreacted monomers in polymer using a SCC according to claim 1 , wherein the SCC further comprises a gas supply part and a remaining gas discharge part.
7. The method for removing unreacted monomers in polymer using a SCC according to claim 6 , wherein air or steam is introduced into the gas supply part.
8. The method for removing unreacted monomers in polymer using a SCC according to claim 1 , wherein the polymer is PVC, and the unreacted monomer is VCM (vinyl chloride monomer).
9. The method for removing unreacted monomers in polymer using a SCC according to claim 8 , wherein supply temperature of the PVC is 40 to 75° C., operation temperature of the SCC is 50 to 70° C., operation pressure of the SCC is 0.3 to 1 atm abs., supply flow velocity of the PVC is 15 to 10,000 liter/hr, and the initial monomer content of the PVC is 0.1 to 2%.
10. A SCC for removing unreacted monomer in polymer comprising:
a housing having a rotation axis;
a supply part of at least one polymer formed inside of the housing;
at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move polymer supplied through the polymer supply part, and rotate around the rotation axis;
a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving polymer from a spinning cone at the upper part to a spinning cone at the lower part;
a product collection part for collecting polymer moved through the spinning cone and the fixed cone; and
a driving part for rotating the spinning cone.
11. The SCC for removing unreacted monomers in polymer according to claim 10 , wherein the SCC further comprises a gas supply part and a remaining gas discharge part.