PROCEDIMENTO PER LA POLIMERIZZAZIONE DI ETILENE

PROCEDIMENTO PER LA POLIMERIZZAZIONE DI ETILENE

In a slurry polymerization for producing an ethylene homopolymer or ethylene- alpha -olefin copolymer in multiple stages, in which the gas phase hydrogen concentration in each stage is different, using a catalyst system comprising a transition metal compound component and an organoaluminum compound...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: HANJI KATSUMI, MASHITA KENTARO
Format: Patent
Sprache:ita
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page
container_issue
container_start_page
container_title
container_volume
creator HANJI KATSUMI
MASHITA KENTARO
description In a slurry polymerization for producing an ethylene homopolymer or ethylene- alpha -olefin copolymer in multiple stages, in which the gas phase hydrogen concentration in each stage is different, using a catalyst system comprising a transition metal compound component and an organoaluminum compound component, the improvement which comprises conducting the polymerization by the use of a solid catalyst component comprising a titanium compound and/or vanadium compound supported on a specified magnesium compound, as the transition metal compound component, in a molar ratio of gas phase hydrogen to ethylene of 0.5 to 15 in the first stage thereby obtaining 30 to 95% by weight, of the total polymer, and in the second stage in a molar ratio of gas phase hydrogen to ethylene, not exceeding 0.2. By this process, it is possible to produce polyethylene having high melt flow and good homogeneity to give molded articles having fewer fish-eyes and less unevenness.
format Patent
fullrecord <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_IT1143919B</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>IT1143919B</sourcerecordid><originalsourceid>FETCH-epo_espacenet_IT1143919B3</originalsourceid><addsrcrecordid>eNrjZNAPCPJ3dnXx9HX1C_FXCHANUvBxVAjw9wEKBHlGRTlGefr7uSq4eCq4hnj6uPq58jCwpiXmFKfyQmluBnk31xBnD93Ugvz41OKCxOTUvNSSeM8QQ0MTY0tDSydjwioAieElbw</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>PROCEDIMENTO PER LA POLIMERIZZAZIONE DI ETILENE</title><source>esp@cenet</source><creator>HANJI KATSUMI ; MASHITA KENTARO</creator><creatorcontrib>HANJI KATSUMI ; MASHITA KENTARO</creatorcontrib><description>In a slurry polymerization for producing an ethylene homopolymer or ethylene- alpha -olefin copolymer in multiple stages, in which the gas phase hydrogen concentration in each stage is different, using a catalyst system comprising a transition metal compound component and an organoaluminum compound component, the improvement which comprises conducting the polymerization by the use of a solid catalyst component comprising a titanium compound and/or vanadium compound supported on a specified magnesium compound, as the transition metal compound component, in a molar ratio of gas phase hydrogen to ethylene of 0.5 to 15 in the first stage thereby obtaining 30 to 95% by weight, of the total polymer, and in the second stage in a molar ratio of gas phase hydrogen to ethylene, not exceeding 0.2. By this process, it is possible to produce polyethylene having high melt flow and good homogeneity to give molded articles having fewer fish-eyes and less unevenness.</description><edition>4</edition><language>ita</language><subject>CHEMISTRY ; COMPOSITIONS BASED THEREON ; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS ; METALLURGY ; ORGANIC MACROMOLECULAR COMPOUNDS ; THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><creationdate>1986</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&amp;date=19861029&amp;DB=EPODOC&amp;CC=IT&amp;NR=1143919B$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19861029&amp;DB=EPODOC&amp;CC=IT&amp;NR=1143919B$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HANJI KATSUMI</creatorcontrib><creatorcontrib>MASHITA KENTARO</creatorcontrib><title>PROCEDIMENTO PER LA POLIMERIZZAZIONE DI ETILENE</title><description>In a slurry polymerization for producing an ethylene homopolymer or ethylene- alpha -olefin copolymer in multiple stages, in which the gas phase hydrogen concentration in each stage is different, using a catalyst system comprising a transition metal compound component and an organoaluminum compound component, the improvement which comprises conducting the polymerization by the use of a solid catalyst component comprising a titanium compound and/or vanadium compound supported on a specified magnesium compound, as the transition metal compound component, in a molar ratio of gas phase hydrogen to ethylene of 0.5 to 15 in the first stage thereby obtaining 30 to 95% by weight, of the total polymer, and in the second stage in a molar ratio of gas phase hydrogen to ethylene, not exceeding 0.2. By this process, it is possible to produce polyethylene having high melt flow and good homogeneity to give molded articles having fewer fish-eyes and less unevenness.</description><subject>CHEMISTRY</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS</subject><subject>METALLURGY</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1986</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNAPCPJ3dnXx9HX1C_FXCHANUvBxVAjw9wEKBHlGRTlGefr7uSq4eCq4hnj6uPq58jCwpiXmFKfyQmluBnk31xBnD93Ugvz41OKCxOTUvNSSeM8QQ0MTY0tDSydjwioAieElbw</recordid><startdate>19861029</startdate><enddate>19861029</enddate><creator>HANJI KATSUMI</creator><creator>MASHITA KENTARO</creator><scope>EVB</scope></search><sort><creationdate>19861029</creationdate><title>PROCEDIMENTO PER LA POLIMERIZZAZIONE DI ETILENE</title><author>HANJI KATSUMI ; MASHITA KENTARO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_IT1143919B3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>ita</language><creationdate>1986</creationdate><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS</topic><topic>METALLURGY</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><toplevel>online_resources</toplevel><creatorcontrib>HANJI KATSUMI</creatorcontrib><creatorcontrib>MASHITA KENTARO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HANJI KATSUMI</au><au>MASHITA KENTARO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCEDIMENTO PER LA POLIMERIZZAZIONE DI ETILENE</title><date>1986-10-29</date><risdate>1986</risdate><abstract>In a slurry polymerization for producing an ethylene homopolymer or ethylene- alpha -olefin copolymer in multiple stages, in which the gas phase hydrogen concentration in each stage is different, using a catalyst system comprising a transition metal compound component and an organoaluminum compound component, the improvement which comprises conducting the polymerization by the use of a solid catalyst component comprising a titanium compound and/or vanadium compound supported on a specified magnesium compound, as the transition metal compound component, in a molar ratio of gas phase hydrogen to ethylene of 0.5 to 15 in the first stage thereby obtaining 30 to 95% by weight, of the total polymer, and in the second stage in a molar ratio of gas phase hydrogen to ethylene, not exceeding 0.2. By this process, it is possible to produce polyethylene having high melt flow and good homogeneity to give molded articles having fewer fish-eyes and less unevenness.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record>
fulltext fulltext_linktorsrc
identifier
ispartof
issn
language ita
recordid cdi_epo_espacenet_IT1143919B
source esp@cenet
subjects CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
title PROCEDIMENTO PER LA POLIMERIZZAZIONE DI ETILENE
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-12T14%3A38%3A41IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=HANJI%20KATSUMI&rft.date=1986-10-29&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EIT1143919B%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true