US4849390A
Expired / Lapsed
US
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Catalysts for polymerization of olefins
Assignee: Eneos Corp
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Filing: 1987-04-16
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Granted: 1989-07-18
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Expires: 2007-04-16
Abstract
Abstract A catalyst for polymerization of olefins is disclosed which comprises a titanium and/or vanadium compound supported on a silicon and/or aluminum oxide carrier. This carrier has peculiar characteristics including a specified proportion of highly spherical oxide particles, a selected average pore size and a specified proportion of a selected particle size range before and after ultrasonic treatment, whereby there is obtained a catalyst having increased bulk density, narrow particle size distribution and high fluidity.
Inventors
- 👤 Akira Sano
- 👤 Kunimichi Kubo
- 👤 Kazuo Matsuura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:09
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/02; C08F4/025; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/909
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A catalyst for polymerization of olefins which comprises a titanium and/or vanadium compound supported on spherical granules of a silicon oxide carrier, characterized in that said carrier has: (i) more than 90% of a particle size distribution represented by a sphericality value of 0.75-1.0 of the equation 4A/πL 2 where A is the projected surface area of and L is the maximum length of an optical projection of each individual granule, (ii) an average pore size of 180 Å-250 Å in diameter, (iii) more than 60% of a pore size portion in the range of 100 Å-300 Å in diameter, and (iv) more than 50% of a particle size portion in the range of 50 μm-150 μm in diameter after exposure to ultrasonic waves of 28 HKz and 200 W for two hours.
Claim 2
Dependent Claim
133 words
A catalyst for polymerization of olefins which comprises a titanium and/or vanadium compound supported on spherical granules of a silicon oxide carrier, characterized in that said carrier has: (i) more than 90% of a particle size distribution represented by a sphericality value of 0.75-1.0 of the equation 4A/πL 2 where A is the projected surface area of and L is the maximum length of an optical projection of each individual granule, (ii) an average pore size of 180 Å-250 Å in diameter, (iii) more than 60% of a pore size portion in the range of 100 Å-300 Å in diameter, and (iv) more than 50% of a particle size portion in the range of 50 μm-150 μm in diameter after exposure to ultrasonic waves of 28 HKz and 200 W for two hours.
Claim 3
Dependent Claim
158 words
A catalyst for polymerization of olefins which comprises a titantium and/or vanadium compound supported on spherical granules of a silicon oxide carrier, characterized in that said carrier has: (i) more than 90% of a particle size distribution represented by a sphericality value of 0.75-1.0 of the equation 4A/πL 2 where A is the projected surface area of and L is the maximum length of an optical projection of each individual granule, (ii) an average pore size of 180 Å-250 Å in diameter, (iii) more than 60% of a pore size portion in the range of 100 Å-300 Å in diameter, and (iv) more than 50% of a particle size portion in the range of 50 μm-150 μm in diameter after exposure to ultrasonic waves of 28 HKz and 200 W for two hours, said catalyst being capable, when used in the polymerization of olefins, of producing polymers characterized by high bulk density, large distribution, high sphericality and fluidity.
Claim 4
Dependent Claim
158 words
A catalyst for polymerization of olefins which comprises a titantium and/or vanadium compound supported on spherical granules of a silicon oxide carrier, characterized in that said carrier has: (i) more than 90% of a particle size distribution represented by a sphericality value of 0.75-1.0 of the equation 4A/πL 2 where A is the projected surface area of and L is the maximum length of an optical projection of each individual granule, (ii) an average pore size of 180 Å-250 Å in diameter, (iii) more than 60% of a pore size portion in the range of 100 Å-300 Å in diameter, and (iv) more than 50% of a particle size portion in the range of 50 μm-150 μm in diameter after exposure to ultrasonic waves of 28 HKz and 200 W for two hours, said catalyst being capable, when used in the polymerization of olefins, of producing polymers characterized by high bulk density, large distribution, high sphericality and fluidity.
References Cited (Backward Citations)
GB1053332A
Cited
GB1484254A
Cited
US4379759A
Cited
US4315999A
Cited
US4396534A
Cited
US4434083A
Cited
US4550093A
Cited
US4593009A
Cited
US4647550A
Cited
US4540757A
Cited
US4560733A
Cited
US4670413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |