PROCESS FOR THE CONTROLLED PRODUCTION OF POLYETHYLENE AND ITS COPOLYMERS
摘要
A process for producing high density polyethylene (HDPE) or linear low density polyethylene (LLDPE) in gas phase reactors, isolated or combined, using chromium or Ziegler-Natta catalysts, provided with on-line control of certain process variables as well as physical properties of the produced resin is described. Such process comprises the use of models for the inference of the physical properties and of the process variables that are not continuously measured as well as models which are relevant for the control of said properties and of the operating conditions of the process. The control of the process variables provides further the maximization of the production rate and of the catalyst productivity in the polymerization reaction.
申请公布号
WO0149751(A1)
申请公布日期
2001.07.12
申请号
WO2000BR00155
申请日期
2000.12.29
申请人
OPP PETROQUIMICA S.A.;DUARTE, BRAGANCA, ANTONIO, LUIZ;PIRAGUACY, DEMORO, ESDRAS;MARTINS DE OLIVEIRA, ARTUR, TOLEDO
发明人
DUARTE, BRAGANCA, ANTONIO, LUIZ;PIRAGUACY, DEMORO, ESDRAS;MARTINS DE OLIVEIRA, ARTUR, TOLEDO