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US4591577A Expired / Lapsed US ⏱️ 0.0 years remaining

Solid catalyst component for alpha-olefin polymerization and process for producing same

Assignee: JNC Corp
•
Filing: 1985-06-04
•
Granted: 1986-05-27
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Expires: 2005-06-04
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Abstract

Abstract A solid catalyst component for α-olefin polymerization which, when produced, causes any troubles due to its small particle size and when used, yields a spherical polymer of a suitably less particle size and a high bulk density with a slightest quantity of atactic polymer and affording a very good dispersibility of powdery additives therein in spite of its narrow particle size distribution, and a process for producing the same, are provided, which solid catalyst component comprises Ti and Cl as active ingredients, having an average particle diameter of 2 to 10μ, a specific surface area of 100 m 2 /g or more and a diffraction line corresponding to a distance between lattices of 4.80 to 5.10 Å by way of X-ray diffraction; and which process is characterized in that when TiCl 4 is reduced with a reducing agent comprising an organoaluminum compound to produce a solid intermediate, there is employed an agitation intensity defined by definite values of agitation power and baffle ratio.

Inventors

  • 👤 Akihiro Sato
  • 👤 Masami Tachibana
  • 👤 Hiroshi Shimizu
  • 👤 Toshihiro Uwai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 12:28
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/908; Y10S526/909

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 53 words
A solid catalyst component for α-olefin polymerization, comprising a TiCl 3 composition having an average particle diameter of 2 to 10 microns, a specific surface area of 100 m 2 /g or more, and a diffraction line corresponding to a distance between lattices of 4.80 to 5.10 Å by way of X-ray diffraction.
Claim 2
Dependent Claim 53 words
A solid catalyst component for α-olefin polymerization, comprising a TiCl 3 composition having an average particle diameter of 2 to 10 microns, a specific surface area of 100 m 2 /g or more, and a diffraction line corresponding to a distance between lattices of 4.80 to 5.10 Å by way of X-ray diffraction.
Claim 3
Dependent Claim 103 words
A process for producing a solid catalyst component for α-olefin polymerization, which process comprises reacting TiCl 4 with a reaction product (I) of an organoaluminum compound (A 1 ) with an electron donor (B) under a vigorous agitation defined by an agitation power required of 0.30 KW/m 3 or greater and a baffle ratio of 0.15 or greater to obtain a solid product (II) which is further reacted with an electron donor (B 2 ) and an electron acceptor (E) to obtain a solid catalyst component for α-olefin polymerization having an average particle diameter of 2 to 10 microns and a spherical shape.
Claim 4
Dependent Claim 103 words
A process for producing a solid catalyst component for α-olefin polymerization, which process comprises reacting TiCl 4 with a reaction product (I) of an organoaluminum compound (A 1 ) with an electron donor (B) under a vigorous agitation defined by an agitation power required of 0.30 KW/m 3 or greater and a baffle ratio of 0.15 or greater to obtain a solid product (II) which is further reacted with an electron donor (B 2 ) and an electron acceptor (E) to obtain a solid catalyst component for α-olefin polymerization having an average particle diameter of 2 to 10 microns and a spherical shape.
Claim 5
Dependent Claim 54 words
A process for producing a solid catalyst component according to claim 2 wherein said reaction product (I) is obtained by reacting one mol of an organoaluminum compound (A 1 ) with 1 to 4 mols of an electron donor in a solvent at -10° C. to +50° C. for 30 seconds to 5 hours.
Claim 6
Dependent Claim 66 words
A process for producing a solid catalyst component according to claim 2 wherein said solid product (II) is obtained by reacting TiCl 4 with said reaction product (I) in ratio of the number of Al atoms in said reaction product (I) to the number of Ti atoms in TiCl 4 , of 0.05 to 1.0, at 0° to 200° C. for 5 minutes to 8 hours.
Claim 7
Dependent Claim 67 words
A process for producing a solid catalyst component according to claim 2 wherein 100 g of said solid product (II) is reacted with 50 to 200 g of an electron donor (B 2 ) and 20 to 500 g of an electron acceptor (E) in the presence of 100 to 1,000 ml of a solvent, at 50° to 100° C. and for 5 minutes to 5 hours.

References Cited (Backward Citations)

US3179604A Cited
US3718635A Cited
US4192774A Cited
US4387198A Cited
US4304891A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-05-26 1989-11-25 1990-05-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-05-26 1993-11-25 1994-05-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-05-26 1997-11-25 1998-05-27 $7700.00 Window Closed / Lapsed

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