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Supported catalyst compositions

A technology of catalyst and composition, applied in the field of catalyst composition, can solve problems such as defectiveness

Inactive Publication Date: 2004-02-25
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, during the production and processing of the above-identified, currently known supported catalyst compositions, small but significant amounts of undesirable, supported or unsupported catalyst species (fine particles) may be produced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0229] Silica (Grace-Davison 948, available from Grace-Davison, a division of W.R. Grace & Co.) was dehydrated at 250°C for 3 hours under nitrogen. Next, the silica was evacuated at a reduced pressure of approximately 500 torr (70 kPa), contacted with hexane (enough to completely wet the silica), and the mixture was then washed with 1.00M Triethylaluminum (TEA) solution was treated in an amount of 2.2 mmol TEA / g silica. The mixture was stirred for 30 minutes, and the solid was washed repeatedly with hexane until the aluminum content in the eluate was below 0.005M. The product was dried under reduced pressure until the amount of residual solvent therein was less than 1.0%. Since triethylaluminum is added in stoichiometric excess relative to the amount of reactive sites on the silica, the final product has essentially no residual hydroxyl functional groups on the silica surface.

[0230] The above TEA-treated silica was placed in a drum dryer equipped with a nozzle for obtaini...

Embodiment 2

[0232] The preparation method of Example 1 was essentially repeated, except that after stirring to remove volatile matter, the supported catalyst composition was continuously extracted with refluxing hexane for 4 hours. The product was dried under a reduced pressure of 90 kPa for 1 hour to a residual solvent level of less than about 0.5%, while slowly stirring the loose material. Example 3

Embodiment 3

[0233] The preparation method of Example 1 was basically repeated, except that instead of removing volatile matter, the supported catalyst composition was continuously extracted with reflux hexane for 4 hours. Comparative Example A

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PUM

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Abstract

The present invention relates to supported catalyst composition for an addition polymerization, a process to prepare the same and the use thereof in an addition polymerization, wherein the composition comprises: (A) a particulated, solid support material; (B) an activator which is an ammonium salt of a compatible, noncoordinating anion, A-, said anion, A- containing a remnant formed by reaction of a non-ionic Lewis acid and a moiety containing an active hydrogen; and (C) a Group 4 metal complex catalyst.

Description

field of invention [0001] The present invention relates to supported catalyst compositions particularly suitable for use in polymerization processes, wherein at least one addition polymerizable monomer is contacted with the supported catalyst composition under polymerization conditions to form a polymerized product. The invention also relates to methods of preparing such supported catalyst compositions. The present invention also relates to polymerization processes, especially gas phase or slurry polymerizations, utilizing such supported catalyst compositions. Background of the invention [0002] In U.S. Patents 5,834,393 and 5,783,512 and WO 98 / 27119 it is disclosed that by adding the ammonium salt of hydroxyphenyltris(pentafluorophenyl)boronic acid or (dialkylhydroxyphenylaluminum)tris-(pentafluorophenyl)boronic acid, In particular those salts in which the ammonium cation contains one or more long-chain aliphatic ligands, deposited onto a thermally...

Claims

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Application Information

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IPC IPC(8): C08F2/34C08F4/02C08F4/645C08F4/646C08F4/659C08F4/6592C08F10/00C08F210/16
CPCC08F4/65908C08F10/00C08F4/65912C08F210/16C08F4/6592C08F4/65916C08F210/14
Inventor G·B·雅各布森M·A·斯普林斯L·D·威尔逊
Owner DOW GLOBAL TECH LLC
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