Supported bis(hydroxyarylaryloxy) catalysts for manufacture of polymers
A polymer and supported technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, catalytic reaction, etc. Difficult polymerization activity, poor reactor operability, etc.
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Embodiment 1-3
[0252] The following examples serve to illustrate the invention and should in no way be construed as limiting the invention. It will be understood by those skilled in the art that the invention disclosed herein may be practiced in the absence of any components not specifically disclosed. All parts and percentages are by weight unless stated to the contrary. If used, the term "overnight" means a period of about 16-18 hours, "room temperature" means a temperature of about 20-25°C, and "mixed alkanes" means C 6-9 Mixtures of aliphatic hydrocarbons, with the trade mark Isopar E Available from Exxon Chemicals, Inc. In cases where the compound name and its structure do not match, the structure controls. All metal complex syntheses and all shielding test preparations were performed under a dry nitrogen atmosphere using dry box techniques. All solvents used were HPLC grade and were dried between uses.
[0253] Preparation of Surface Modified Silica
[0254] 1A. Davison 955 hea...
Embodiment 1
[0260] Example 1 0.105 grams (10.2 μmol) of propane-1,3-bis[oxyphenyl-2-((N-2,3,4,5-diindene) prepared according to US-A-2004 / 0005984 Indole)-5-methyl-2-oxo)phenyl]dimethylhafnium (which is subsequently converted to the dimethyl complex by reaction with methylmagnesium bromide) (see Figure 1 for the structure), 2.01 g of MAO modified Inert Silica 1A and 25 mL of dry degassed toluene were added to a 50 mL glass flask. The bottle was capped and shaken on an orbital shaker for 4.5 hours. The solid product was isolated by filtration and dried under reduced pressure.
Embodiment 2
[0262] Example 2 Preparation of propane-1,3-bis[oxyphenyl-2-((N-2,3,4,5-dibenzopyrrole)-5- Methyl-2-oxo)phenyl] dimethyl hafnium (see Figure 1 for the structure) in 25 ml of toluene solution. This solution was combined with a continuously stirred slurry of surface treated fumed silica 1D, and the combined mixture was stirred for an additional 1 hour. The mixture was spray dried under anaerobic conditions (essentially as disclosed in US-A-5,672,669 and US-A-5,674,795) using a laboratory spray dryer located in a drying box. A total of 11 g of spherical particles with a D50 particle size of 5-15 μm and an average hafnium content of 40 μmol / g were obtained.
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