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filingDate 1993-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7a478b727feaaad314ec8a656d596d3
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publicationDate 1995-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber HU-211769-B
titleOfInvention Process for producing supported catalyst for alpha-olefin polymerization and for polymerization of alpha-olefin in present thereof
abstract (1) ein Siliciumdioxid enthaltendes Trägergel herstellt, indem mann (1.1) in einen unter Drall stehenden Strom einer wäßrigen Mineralsäure längs sowie tangential zum Strom eine Natrium- oder Kaliumwasserglaslösung einbringt, das dabei entstehende Kieselsäure-Hydrosol in ein gasförmiges Medium tropfenförmig versprüht, zum Hydrogel erstarren läßt und das so erhaltene Hydrogel ohne vorherige Alterung durch Waschen von Salzen befreit, (1.2) das aus (1.1) resultierende Hydrogel trocknet, wobei die Trägergel-Bildung erfolgt, und (2) das Trägergel (1) mit Chromtrioxid oder einer unter den Bedingungen des Verfahrensschritts (3) in Chromtrioxid überführbaren Chromverbindung belädt, wodurch ein chromhaltiges Trägergel entsteht, und (3) das chromhaltige Trägergel (2) in einem wasserfreien, Sauerstoff in einer Konzentration von über 10 Vol.-% enthaltenden Gasstrom während 10 bis 1000 Minuten auf 400 bis 1100°C erhitzt, wobei man das aus dem Verfahrensschritt (1.1) resultierende Hydrogel im Verfahrensschritt (1.2) innerhalb einer Zeit von nicht mehr als 60 Sekunden in einem formgebenden Schnelltrockner bei einer Eingangstemperatur von 80 bis 400°C trocknet.Process for the preparation of a supported catalyst for the polymerization of α-olefins, in which (1) preparing a silica-containing carrier gel by reacting (1.1) longitudinally in a swirling current of an aqueous mineral acid as well as tangentially to the current introduces a sodium or potassium water glass solution which sprayed resulting hydrosulphurous hydrosol dropwise in a gaseous medium, solidify the hydrogel and the resulting hydrogel without prior aging by Washing of salts freed, (1.2) drying the hydrogel resulting from (1.1), wherein the carrier gel formation takes place, and (2) loading the carrier gel (1) with chromium trioxide or a chromium compound convertible into chromium trioxide under the conditions of process step (3) to form a chromium-containing carrier gel, and (3) heating the chromium-containing carrier gel (2) to 400 to 1100 ° C in an anhydrous gas stream containing oxygen at a concentration of more than 10% by volume for 10 to 1000 minutes, wherein the hydrogel resulting from process step (1.1) is dried in process step (1.2) within a time of not more than 60 seconds in a forming rapid dryer at an inlet temperature of 80 to 400 ° C.
priorityDate 1992-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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