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...http://www.google.es/patents/US7582708?utm_source=gb-gplus-sharePatente US7582708 - Bulk polymerization reactor methods