CHROMIUM-ON-SILICA CATALYSTS AND METHODS OF MAKING THE SAME
A composition, such as a catalyst precursor or a catalyst comprising a Cr coated silica support with particularly defined levels of Na and Al, such that the resulting Cr/Silica catalyst has an increased MI potential is disclosed. In an embodiment, the disclosed catalyst composition comprises a silic...
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| creator | COLLOPY, David George HU, Yatao Rachel SHAH, Parag Rasiklal PARKER, Robert Joseph LEE, Myoung Kie |
| description | A composition, such as a catalyst precursor or a catalyst comprising a Cr coated silica support with particularly defined levels of Na and Al, such that the resulting Cr/Silica catalyst has an increased MI potential is disclosed. In an embodiment, the disclosed catalyst composition comprises a silica-containing substrate made using a base-set gel and comprising a catalytically active metal consisting of Cr, with Al impurities of less than 50 ppm and Na in an amount of less than 800 ppm of the catalyst composition. The disclosed composition has an increased MI potential over a catalyst having higher Al content, a lower Na:Al ratio, or both. Methods of making the disclosed composition, and methods of using it to prepare a polyethylene are also disclosed. |
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In an embodiment, the disclosed catalyst composition comprises a silica-containing substrate made using a base-set gel and comprising a catalytically active metal consisting of Cr, with Al impurities of less than 50 ppm and Na in an amount of less than 800 ppm of the catalyst composition. The disclosed composition has an increased MI potential over a catalyst having higher Al content, a lower Na:Al ratio, or both. 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Methods of making the disclosed composition, and methods of using it to prepare a polyethylene are also disclosed.</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>2023</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLB29gjy9_UM9dX199MN9vTxdHZUcHYMcfSJDA4JVnD0c1HwdQ3x8HcJVvB3U_B19Pb0c1cI8XBVCHb0deVhYE1LzClO5YXS3AzKbq4hzh66qQX58anFBYnJqXmpJfGhwUYGRsbGZqbmRqaOhsbEqQIAa-Yp_g</recordid><startdate>20231116</startdate><enddate>20231116</enddate><creator>COLLOPY, David George</creator><creator>HU, Yatao Rachel</creator><creator>SHAH, Parag Rasiklal</creator><creator>PARKER, Robert Joseph</creator><creator>LEE, Myoung Kie</creator><scope>EVB</scope></search><sort><creationdate>20231116</creationdate><title>CHROMIUM-ON-SILICA CATALYSTS AND METHODS OF MAKING THE SAME</title><author>COLLOPY, David George ; HU, Yatao Rachel ; SHAH, Parag Rasiklal ; PARKER, Robert Joseph ; LEE, Myoung Kie</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2023365725A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2023</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>COLLOPY, David George</creatorcontrib><creatorcontrib>HU, Yatao Rachel</creatorcontrib><creatorcontrib>SHAH, Parag Rasiklal</creatorcontrib><creatorcontrib>PARKER, Robert Joseph</creatorcontrib><creatorcontrib>LEE, Myoung Kie</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>COLLOPY, David George</au><au>HU, Yatao Rachel</au><au>SHAH, Parag Rasiklal</au><au>PARKER, Robert Joseph</au><au>LEE, Myoung Kie</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>CHROMIUM-ON-SILICA CATALYSTS AND METHODS OF MAKING THE SAME</title><date>2023-11-16</date><risdate>2023</risdate><abstract>A composition, such as a catalyst precursor or a catalyst comprising a Cr coated silica support with particularly defined levels of Na and Al, such that the resulting Cr/Silica catalyst has an increased MI potential is disclosed. In an embodiment, the disclosed catalyst composition comprises a silica-containing substrate made using a base-set gel and comprising a catalytically active metal consisting of Cr, with Al impurities of less than 50 ppm and Na in an amount of less than 800 ppm of the catalyst composition. The disclosed composition has an increased MI potential over a catalyst having higher Al content, a lower Na:Al ratio, or both. Methods of making the disclosed composition, and methods of using it to prepare a polyethylene are also disclosed.</abstract><oa>free_for_read</oa></addata></record> |
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| 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 | CHROMIUM-ON-SILICA CATALYSTS AND METHODS OF MAKING THE SAME |
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