Bulk polymerization reactors
View Patent ↗A polymerization reactor having at least three side wall surfaces and a bottom wall surface forming a reservoir and at least one heat exchanger plate in fluid communication with a coolant source, wherein each of the at least one heat exchanger plate is disposed on a lid. The polymerization reactors of the present invention permit large amounts of polymer to be formed in each reactor batch. Preferably, polymers are formed in the polymerization reactor by bulk polymerization. Methods for forming polymers is also disclosed.
1. A polymerization reactor for polymerization of olefins comprising:
a reservoir having at least three side wall surfaces and a bottom wall surface thereby forming a reservoir cavity;
at least one heat exchanger plate in fluid communication with a coolant source, wherein at least one of the at least one heat exchanger plates includes a film disposed thereon, the film being a barrier between an exothermic polymerization reaction mixture disposed within the reservoir cavity and at least one of the at least one heat exchanger plates; and
a lid having a top wall surface and an inner wall surface, wherein the at least one heat exchanger plate is disposed perpendicular to the inner wall surface,
the exothermic polymerization reaction mixture reacts to form a bulk polyalphaolefin polymer, the rate of the exothermic reaction of the mixture in the formation of the bulk polyalphaolefin polymer is controlled by the substantially homogeneous removal of heat from the mixture by the heat exchanger, the substantially homogeneous removal of heat from the mixture by the heat exchange is effected by placing each heat exchanger at a position relative of the mixture for the homogeneous removal of heat from the center most region of the mixture by the heat exchanger, such that sufficient cooling is provided of the exothermic polymerization reaction mixture to optimize the functionality of the bulk polyalphaolefin polymer.
2. The polymerization reactor of claim 1 , wherein the film is removable.
3. The polymerization reactor of claim 1 , wherein the film is a plastic sheet.
4. The polymerization reactor of claim 1 , wherein the film is a plastic sheath.
5. The polymerization reactor of claim 1 , wherein the film is a spray-on substance.
6. The polymerization reactor of claim 5 , wherein the spray-on substance is a non-stick spray-on substance.
7. The polymerization reactor of claim 1 , wherein each of the at least one heat exchanger plates includes a removable film.
8. The polymerization reactor of claim 7 , wherein the film is removable.
9. The polymerization reactor of claim 7 , wherein the film is a plastic sheet.
10. The polymerization reactor of claim 7 , wherein the film is a plastic sheath.
11. The polymerization reactor of claim 7 , wherein the film is a spray-on substance.
12. The polymerization reactor of claim 11 , wherein the spray-on substance is a non-stick spray-on substance.
13. A polymerization reactor for the bulk polymerization of olefins having at least one alpha olefin monomer to form an adherent bulk polyalphaolefin polymer, the reactor comprising:
(a) a reservoir comprising a plurality of side walls and a bottom wall,
(b) a lid comprising an exterior surface and an interior surface, the lid for removeably engaging the plurality of side walls for enclosing the reservoir, and
(c) at least one heat exchanger in communication with a coolant source, each heat exchanger disposed perpendicular to the lid and extending from the interior surface of the lid, and further comprising
a removable film circumscribing each heat exchanger for removeably engaging the heat exchanger,
each heat exchanger circumscribed by the removable film is lowered into the reservoir such that the lid engages the side walls for enclosing the reservoir with each heat exchanger oriented substantially parallel to the side walls of the reservoir and substantially perpendicular to the lid, at least one alpha olefin monomer and at least one catalyst is combined in the reservoir to form an exothermic polymerization reaction mixture within the reservoir and among each heat exchanger, the exothermic polymerization reaction mixture reacts to form a bulk polyalphaolefin polymer, the rate of the exothermic reaction of the mixture in the formation of the bulk polyalphaolefin polymer is controlled by the homogeneous removal of heat from the mixture by the heat exchanger, the homogeneous removal of heat from the mixture by the heat exchanger is effected by placing each heat exchanger at a position relative of the mixture for the homogeneous removal of heat from the center most region of the mixture by the heat exchanger, such that sufficient cooling is provided of the exothermic polymerization reaction mixture to optimize the functionality of the bulk polyalphaolefin polymer, such that upon completion of the polymerization, the lid and each heat exchanger can be removed from the reservoir leaving the bulk polyalphaolefin polymer in the reservoir, and the reactor comprising the reservoir, the lid and the heat exchangers can be reused.
14. The polymerization reactor for the bulk polymerization of olefins as defined in claim 13 , wherein the side walls of the reservoir cavity have a length of at least two feed and a height of at least two feet.
15. The polymerization reactor for the bulk polymerization of olefins as defined in claim 13 , wherein the lid is a rectangularly shaped having a length and a width the length being at least three feet and the width being at least two feet.
16. The polymerization reactor for the bulk polymerization of olefins as defined in claim 13 , wherein the reservoir is formed by four side walls, two of the four side walls of the reservoir having a length of at least two feet and a height of at least two feet, the other two of the four side walls of the reservoir cavity having a length of at least three feet and a height of at least two feet, and the lid is rectangularly shaped having a length and a width, the length at least three feet and width being at least two feet.