Patent application number | Description | Published |
20090082197 | Methods of preparing a polymerization catalyst - A method of preparing a catalyst comprising contacting a support with a trivalent titanium compound and a chromium-containing compound. A catalyst composition comprising a support, chromium, and titanium, wherein the titanium is derived from TiCl | 03-26-2009 |
20090088318 | Methods of preparing a polymerization catalyst - A method comprising contacting a donor support with a recipient support to generate a mixture, and heating the mixture to produce a polymerization catalyst, wherein a metal or a metal-containing compound migrates from the donor support to the recipient support. A method comprising contacting a donor support comprising inactive metal species with a recipient support, and mobilizing the inactive metal species from the donor support to form an active metal species on the recipient support. | 04-02-2009 |
20090156762 | Methods of Preparing a Polymerization Catalyst - A method comprising contacting a support with one or more chromium-containing compounds and one or more boria precursors to provide a catalyst precursor, and activating the catalyst precursor to provide a polymerization catalyst. | 06-18-2009 |
20090240010 | ALUMINA-SILICA ACTIVATOR-SUPPORTS FOR METALLOCENE CATALYST COMPOSITIONS - The present invention provides activator-supports containing alumina-silica compounds with high levels of alumina, and polymerization catalyst compositions employing these activator-supports. Methods for making these activator-supports based on alumina-silica and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided. | 09-24-2009 |
20090275710 | Methods of preparing a polymerization catalyst - A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, and activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst. A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst, and contacting the polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form polyethylene wherein the molecular weight distribution of the polyethylene is broadened. | 11-05-2009 |
20100076167 | SILICA-COATED ALUMINA ACTIVATOR-SUPPORTS FOR METALLOCENE CATALYST COMPOSITIONS - Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins. | 03-25-2010 |
20100222537 | Polymers Having Broad Molecular Weight Distributions and Methods of Making the Same - Methods of polymerizing at least one olefin include contacting the olefin with a catalyst comprising chromium and with a cocatalyst comprising a non-transition metal cyclopentadienyl (Cp) compound. The polymerization may be performed in the presence of hydrogen. Using the cocatalyst in conjunction with the catalyst increases several properties, such as the high load melt index (HLMI), the M | 09-02-2010 |
20100240844 | Methods of Preparing a Polymerization Catalyst - A method comprising (a) contacting a support and a chromium-containing compound to form chromium-containing support, (b) heat treating the chromium-containing support in an oxidizing atmosphere to form a treated support, (c) contacting the treated support with carbon monoxide to form a CO-contacted support, and (d) contacting the CO-contacted support with hydrogen to form a catalyst. A method comprising oxidizing a chromium-treated support to form a polymerization catalyst, contacting the polymerization catalyst with carbon monoxide to form a reduced polymerization catalyst, contacting the reduced polymerization catalyst with hydrogen to form an activated polymerization catalyst, and contacting the activated polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form a random copolymer. A method comprising reducing a polymerization catalyst comprising Cr(VI) to form a polymerization catalyst comprising Cr(II), and treating the polymerization catalyst comprising Cr(II) with hydrogen. | 09-23-2010 |
20100280199 | COMPOSITIONS THAT CAN PRODUCE POLYMERS - This invention provides a compositions that are useful for polymerizing at least one monomer into at least one polymer. | 11-04-2010 |
20110092357 | SILICA-COATED ALUMINA ACTIVATOR-SUPPORTS FOR METALLOCENE CATALYST COMPOSITIONS - Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins. | 04-21-2011 |
20110136996 | Methods of Preparing a Polymerization Catalyst - A method comprising (a) contacting a support and a chromium-containing compound to form chromium-containing support, (b) heat treating the chromium-containing support in an oxidizing atmosphere to form a treated support, (c) contacting the treated support with carbon monoxide to form a CO-contacted support, and (d) contacting the CO-contacted support with hydrogen to form a catalyst. A method comprising oxidizing a chromium-treated support to form a polymerization catalyst, contacting the polymerization catalyst with carbon monoxide to form a reduced polymerization catalyst, contacting the reduced polymerization catalyst with hydrogen to form an activated polymerization catalyst, and contacting the activated polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form a random copolymer. A method comprising reducing a polymerization catalyst comprising Cr(VI) to form a polymerization catalyst comprising Cr(II), and treating the polymerization catalyst comprising Cr(II) with hydrogen. | 06-09-2011 |
20120041160 | ADDITIVES TO CHROMIUM CATALYST MIX TANK - Systems and methods for the maintenance of active chromium-based catalysts and their use in polymerization processes are described. In one embodiment, a system for the introduction of multiple polymerization components to activate a chromium based catalyst within a mix tank is described. Other described features may include materials and methods to purify the liquid medium of a catalyst slurry so that the catalyst slurry maintains a high level of activity. The active chromium-based catalyst may provide polyolefins with a number of desirable properties in a reliable, consistent, and predictable manner. | 02-16-2012 |
20120277385 | METHODS FOR TERMINATING OLEFIN POLYMERIZATIONS - Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems. | 11-01-2012 |
20130137839 | Long Chain Branched Polymers and Methods of Making Same - A polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 8 long chain branches per million carbon atoms, a polydispersity index of greater than about 20 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 1 long chain branches per chain, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. | 05-30-2013 |
20130144017 | Methods of Preparing a Catalyst - A method of preparing a catalyst comprising contacting an acidic colloidal silica suspension with a titanium-containing compound to form a mixture, adjusting the pH of mixture to about neutral to form a catalyst support, and contacting the catalyst support with chromium-containing compound to from a chromium-supported catalyst. A catalyst support prepared by contacting a colloidal silica suspension and a titanium-containing compound under acidic conditions to form a mixture, and contacting the mixture with a basic material in an amount sufficient to increase the pH of the mixture to about 7. | 06-06-2013 |
20130175211 | ADDITIVES TO CHROMIUM CATALYST MIX TANK - Systems and methods for the maintenance of active chromium-based catalysts and their use in polymerization processes are described. In one embodiment, a system for the introduction of multiple polymerization components to activate a chromium based catalyst within a mix tank is described. Other described features may include materials and methods to purify the liquid medium of a catalyst slurry so that the catalyst slurry maintains a high level of activity. The active chromium-based catalyst may provide polyolefins with a number of desirable properties in a reliable, consistent, and predictable manner. | 07-11-2013 |
20130228723 | Methods for Terminating Olefin Polymerizations - Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems. | 09-05-2013 |
20130345373 | Methods for Terminating Olefin Polymerizations - Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems. | 12-26-2013 |
20140058054 | Vapor Phase Preparation of Fluorided Solid Oxides - Methods for the vapor phase preparation of fluorided solid oxide activator-supports, using certain calcining temperatures and fluoriding temperatures, are disclosed. | 02-27-2014 |
20140275457 | Polymerization Catalysts and Polymers - A method comprising contacting a support material with a transition metal compound to produce a mixture; thermally treating the mixture in the presence of oxygen at a temperature in a range of from about 100° C. to about 500° C. for a period of from about 1 hour to about 10 hours, wherein at least a portion of the transition metal sublimes onto the support material to produce a support material comprising a dispersed transition metal; and thermally treating the support material comprising the dispersed transition metal in an oxidizing atmosphere at a temperature in a range of from about 550° C. to about 900° C. for a period of from about 1 hour to about 10 hours to produce a polymerization catalyst. | 09-18-2014 |
20140275458 | Methods of Preparing a Polymerization Catalyst - A method comprising contacting a silica support material with a sulfating agent to form a sulfated silica support material comprising sulfate anions; thermally treating the sulfated silica support material to form a thermally treated sulfated silica support material; contacting the thermally treated sulfated silica support material with a chromium-containing compound to form a mixture; and thermally treating the mixture to form a polymerization catalyst. A method comprising thermally treating a silica support material to form a thermally-treated silica support material; contacting the thermally-treated silica support material with a sulfating agent to form a thermally treated sulfated silica support material; thermally treating the thermally treated sulfated silica support material to form a processed silica support material; contacting the processed silica support material with a chromium-containing compound to form a precursor polymerization catalyst; and thermally treating the precursor polymerization catalyst to form a polymerization catalyst. | 09-18-2014 |
20150018503 | Methods for Producing Fluorided-Chlorided Silica-Coated Alumina Activator-Supports and Catalyst Systems Containing the Same - Methods for the preparation of fluorided-chlorided silica-coated alumina activator-supports are disclosed. These activator-supports can be used in catalyst systems for the production of olefin-based polymers, such as polyethylene and polypropylene. | 01-15-2015 |