VERFAHREN ZUR KONTROLLIERTEN HERSTELLUNG VON POLYETHYLEN UND SEINEN COPOLYMEREN
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...
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| creator | PIRAGUACY, DEMORO, ESDRAS MARTINS DE OLIVEIRA, ARTUR DUARTE, BRAGANCA, ANTONIO, LUIZ |
| description | 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. |
| format | Patent |
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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.</description><edition>7</edition><language>ger</language><subject>CHEMISTRY ; COMPOSITIONS BASED THEREON ; CONTROL OR REGULATING SYSTEMS IN GENERAL ; CONTROLLING ; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS ; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS ; METALLURGY ; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS ; ORGANIC MACROMOLECULAR COMPOUNDS ; PHYSICS ; REGULATING ; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES ; THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><creationdate>2004</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20040515&DB=EPODOC&CC=AT&NR=E266047T1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20040515&DB=EPODOC&CC=AT&NR=E266047T1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>PIRAGUACY, DEMORO, ESDRAS</creatorcontrib><creatorcontrib>MARTINS DE OLIVEIRA, ARTUR</creatorcontrib><creatorcontrib>DUARTE, BRAGANCA, ANTONIO, LUIZ</creatorcontrib><title>VERFAHREN ZUR KONTROLLIERTEN HERSTELLUNG VON POLYETHYLEN UND SEINEN COPOLYMEREN</title><description>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. 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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.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOSITIONS BASED THEREON CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES THEIR PREPARATION OR CHEMICAL WORKING-UP |
| title | VERFAHREN ZUR KONTROLLIERTEN HERSTELLUNG VON POLYETHYLEN UND SEINEN COPOLYMEREN |
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