Title:
【発明の名称】ポリエチレン及びその共重合体の制御された生産のためのプロセス
Document Type and Number:
Japanese Patent JP2003519255
Kind Code:
A
Abstract:
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.
Inventors:
Dualte, Braganca, Antonio, Lewis
Piraguacy, Demoro, Esdras
Martins de Oliveira, Altor, Toledo
Piraguacy, Demoro, Esdras
Martins de Oliveira, Altor, Toledo
Application Number:
JP2001550291A
Publication Date:
June 17, 2003
Filing Date:
December 29, 2000
Export Citation:
Assignee:
Op Quimika Sociedad Anonima
International Classes:
C08F2/00; C08F10/00; C08F2/34; C08F10/02; G05B13/02; G05D21/02; C08F110/02; C08F210/16; (IPC1-7): C08F2/34; C08F10/00
Attorney, Agent or Firm:
Akira Asamura (3 outside)