Organometal catalyst compositions
View Patent ↗This invention provides oxide matrix compositions that can be utilized in catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. The oxide matrix composition comprises residual mineral components and an oxide precursor. The catalyst composition comprises contacting an organometal compound, an organoaluminum compound, and an oxide matrix composition. Processes for producing the oxide matrix composition and the catalyst composition are also provided.
1. A process to produce an amorphous oxide matrix composition, said process comprising:
1) substantially decomposing or exfoliating at least one layered mineral to produce residual mineral components;
wherein said layered mineral is a clay, clay mineral, or ion exchanging compound having a layered crystal structure;
2) contacting said residual mineral components and at least one oxide precursor compound to produce a first mixture;
wherein said oxide precursor compound is a silica source, an alumina source, a phosphate source; or combinations thereof;
3) subjecting said first mixture to such conditions to form a co-gel or co-precipitate; and
4) drying said co-gel or co-precipitate and then calcining said co-gel or co-precipitate at a temperature in a range of about 150° C. to about 800° C. to produce said oxide matrix composition.
2. A process according to claim 1 wherein said decomposing or exfoliating is accomplished by contacting said layered mineral with a digestion agent which is an aqueous solvent or other protic solvent followed by a) high shear mixing, b) high energy sonnification, or c) grinding or milling to produce a colloidal suspension of said residual mineral components.
3. A process according to claim 1 wherein said co-gel is formed by adjusting the pH of said first mixture to a pH in a range of about 4 to about 9.
4. A process according to claim 1 further comprising aging said co-gel for about 5 minutes to about 10 hours at a temperature in a range of about 60 to 100° C. prior to drying and calcining to produce an aged gel or precipitate.
5. A process according to claim 4 further comprising washing said aged gel prior to drying and calcining to remove undesirable ions.
6. A process according to claim 5 further comprising grinding said aged gel to a desirable particle size prior to calcining.
7. A process to produce an amorphous oxide matrix composition, said process comprising:
1) substantially decomposing or exfoliating a layered mineral to produce residual mineral components in the presence of an oxide precursor compound to produce a residual mineral component/oxide precursor mixture;
wherein said layered mineral is a clay, clay mineral, or ion exchanging compound having a layered crystal structure;
wherein said oxide precursor compound is a silica source, an alumina source, a phosphate source; or combinations thereof,
2) subjecting said residual mineral/component mixture to such conditions to form a co-gel or co-precipitate; and
3) drying said co-gel or co-precipitate and then calcining said co-gel or co-precipitate at a temperature in a range of about 150° C. to about 800° C. to produce said oxide matrix composition.
8. A process according to claim 7 wherein said decomposing or exfoliating is accomplished by contacting said layered mineral with a digestion agent which is an aqueous solvent or other protic solvent followed by a) high shear mixing, b) high energy sonnification, or c) grinding or milling to produce a colloidal suspension of said residual mineral components.
9. A process according to claim 8 wherein said co-gel is formed by adjusting the pH of said residual mineral component/oxide precursor mixture to a pH in a range of about 4 to about 9.
10. A process according to claim 7 further comprising aging said co-gel for about 5 minutes to about 10 hours at a temperature in a range of about 60 to 100° C. prior to drying and calcining to produce an aged gel or aged precipitate.
11. A process according to claim 10 further comprising washing said aged gel or precipitate prior to drying and calcining to remove undesirable ions.
12. A process according to claim 11 further comprising grinding said aged gel or precipitate to a desirable particle size prior to calcining.
13. An amorphous oxide matrix composition produced by claim 1 .
14. An amorphous oxide matrix composition produced by claim 7 .
15. An amorphous oxide matrix composition comprising a co-gel or co-precipitate comprising residual mineral components and at least one oxide precursor compound;
wherein said residual mineral components are produced by substantially decomposing or exfoliating a layered mineral to produce residual mineral components;
wherein said layered mineral is a clay, clay mineral, or ion exchanging compound having a layered crystal structure; and
wherein said oxide precursor compound is a silica source, alumina source, a phosphate source, or combinations thereof.
16. An oxide matrix composition made according to claim 1 having an amorphous X-ray diffraction pattern.
17. An oxide matrix composition made according to claim 7 having an amorphous X-ray diffraction pattern.
18. An oxide matrix composition made according to claim 1 having a pore volume greater than 1.0 mL/g.
19. An oxide matrix composition made according to claim 7 having a pore volume greater than 1.0 mL/g.