Claims
- 1. A process for preparing a bimetallic catalyst, the process comprising:
(a) providing a supported non-metallocene catalyst by:
(i) preparing a slurry of a dehydrated support in a non-polar hydrocarbon; (ii) contacting the slurry of (i) with an organomagnesium compound RMgR′, where R and R′ are the same or different C2-C12 alkyl groups; (iii)contacting the slurry of (ii) with a non-metallocene compound of a Group 4 or Group 5 transition metal; and (iv) drying the product of (iii) to obtain a supported non-metallocene catalyst; (b) contacting a slurry of the supported non-metallocene catalyst in a non-polar hydrocarbon with a solution of a metallocene compound and a C1-C8 alkyl alumoxane in an aromatic solvent; and (c) drying the product of (b) to obtain a supported bimetallic catalyst.
- 2. The process of claim 1, wherein the support material is silica.
- 3. The process of claim 1, wherein the non-polar hydrocarbon in (a) is selected from the group consisting of C4-C10 linear or branched alkanes, cycloalkanes and aromatics.
- 4. The process of claim 1, wherein the organomagnesium compound is dibutylmagnesium.
- 5. The process of claim 1, wherein the organomagnesium compound is used in an amount of from 0.2 mmol to 2 mmol organomagnesium compound per gram of dehydrated support material.
- 6. The process of claim 1 further comprising before step (iii), contacting the slurry of (ii) with an alcohol R″OH.
- 7. The process of claim 6, wherein R″ is a C1-C12 alkyl group.
- 8. The process of claim 7, wherein the alcohol is n-butanol.
- 9. The process of claim 7, wherein the alcohol is used in an amount of 0.2 to 1.5 moles per mole of magnesium provided by the organomagnesium compound.
- 10. The process of claim 1, wherein the Group 4 or 5 transition metal is titanium or vanadium.
- 11. The process of claim 1, wherein the non-metallocene transition metal compound is a titanium halide, a titanium alkoxide, a vanadium halide, a vanadium oxyhalide or a vanadium alkoxide.
- 12. The process of claim 1, wherein the non-metallocene transition metal compound is used in an amount to provide from 0.3 to 1.5 moles of the Group 4 or 5 transition metal per mole of magnesium provided by the organomagnesium compound.
- 13. The process of claim 1, wherein the metallocene compound is a substituted, unbridged bis-cyclopentadienyl compound.
- 14. A process for preparing a bimetallic catalyst, the process comprising:
(a) providing a supported non-metallocene titanium catalyst by:
(i) preparing a slurry of a dehydrated silica in a non-polar hydrocarbon; (ii) contacting the slurry of (i) with dibutylmagnesium; (iii)contacting the slurry of (ii) with n-butanol; (iv) contacting the slurry of (iii) with titanium tetrachloride; and (v) drying the product of (iv) to obtain a supported non-metallocene titanium catalyst; (b) contacting a slurry of the supported non-metallocene titanium catalyst in a non-polar hydrocarbon with a solution of a zirconium or hafnium metallocene compound and methylalumoxane in an aromatic solvent; and (c) drying the product of (b) to obtain a supported bimetallic catalyst.
- 15. The process of claim 14, wherein the non-polar hydrocarbon in (a) is selected from the group consisting of C4-C10 linear or branched alkanes, cycloalkanes and aromatics.
- 16. The process of claim 14, wherein the dibutylmagnesium is used in an amount of from 0.2 mmol to 2 mmol dibutylmagnesium compound per gram of dehydrated silica.
- 17. The process of claim 14, wherein the n-butanol is in an amount of 0.2 to 1.5 moles per mole of dibutylmagnesium.
- 18. The process of claim 14, wherein the titanium tetrachloride is used in an amount to provide from 0.3 to 1.5 moles of titanium per mole of dibutylmagnesium.
- 19. The process of claim 14, wherein the metallocene compound is a substituted, unbridged bis-cyclopentadienyl compound.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. Ser. No. 08/555,816, filed Nov. 9, 1995, now allowed, the entire disclosure of which is expressly incorporated herein by reference.
Continuations (1)
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Number |
Date |
Country |
Parent |
08555816 |
Nov 1995 |
US |
Child |
10244930 |
Sep 2002 |
US |