Patent EP0285443B1 successfully refreshed from Google Patents.
EP0285443B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing solid catalyst for polymerization of olefins
Assignee: Mitsui Chemicals Inc
•
Filing: 1988-03-31
•
Granted: 1992-01-08
•
Expires: 2008-03-31
Abstract
Abstract A process for producing a solid catalyst for polymerization of olefins, which comprises bringing a solution of an aluminoxane into contact with a suspension of a particulate carrier having supported thereon a compound of a transition metal of Group IVB of the periodic table in a solvent in which the aluminoxane is insoluble or sparingly soluble. In another aspect, the invention provides a process for producing a solid catalyst for polymerization of olefins, which comprises bringing a suspnension of a particulate carrier having supported thereon a compound of a transition metal of Group IVB of the periodic table in a solution of an aluminoxane into contact with a solvent in which the aluminoxane is insoluble or sparingly soluble.
Inventors
- 👤 Mamoru Kioka
- 👤 Norio Kashiwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 18:03
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F10/00; C08F4/659; C08F4/65912; C08F4/65916; C08F4/6592; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/904; Y10S526/943
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
A process for producing a solid catalyst for use in the polymerization of olefins, which process comprises either; (a) bringing a solution of an aluminoxane into contact with a suspension of a particulate carrier having supported thereon a compound of a transition metal of Group IVB of the periodic table in a solvent in which the aluminoxane is insoluble or sparingly soluble; or (b) bringing a suspension of a particulate carrier having supported thereon a compound of a transition metal of Group IV B of the periodic table in a solution of an aluminoxane into contact with a solvent in which the aluminoxane is insoluble or sparingly soluble.
Claim 2
Dependent Claim
26 words
A process according to claim 1 wherein the transition metal compound is a zirconium compound having a group containing a conjugated π electron as a ligand.
Claim 3
Dependent Claim
150 words
A process according to claim 2 wherein the zirconium compound is of formula (I) R¹ k R² ℓ R³ m R⁴ n Zr (I) wherein R¹ represents a cycloalkadienyl group or a substituted cycloalkadienyl group, each of R², R³ and R⁴ represents a cycloalkadienyl group, an aryl group, an alkyl group, a cycloalkyl group, an aralkyl group, a halogen atom, a hydrogen atom, OR a , SR b , NR c , or PR d 2 , R a , R b , R c and R d each represent a hydrocarbon group or a silyl group, the two R c 's or two R d 's may be linked to each other to form a ring, k is not more than 1, and k+ +m+n is 4; provided that when R² represents a cycloalkadienyl group, R¹ and R² may be bonded to each other via a lower alkylene group.
Claim 4
Dependent Claim
22 words
A process according to claim 3 wherein the cycloalkadienyl group is a cylopentadienyl, methylcyclopentadienyl, ethylcyclopentadienyl, pentamethylcyclopentadienyl, dimethylcyclopentadienyl, indenyl, ethylenebisindenyl or tetrahydroindenyl group.
Claim 5
Dependent Claim
18 words
A process according to claim 3 wherein the zironium compound is bis(cyclopentadienyl)zirconium dichloride, bis(methylcyclopentadienyl)zirconium dichloride, or ethylenebis-indenylzirconium dichloride.
Claim 6
Dependent Claim
34 words
A process according to any one of the preceding claims wherein the aluminoxane is of formula (II) or (III) wherein R represents a hydrocarbon group, and p is an integer of at least 2.
Claim 7
Dependent Claim
27 words
A process according to claim 6 wherein R is a methyl, ethyl, n-propyl, isopropyl, n-butyl or isobutyl group, and p is an integer of at least 8.
Claim 8
Dependent Claim
34 words
A process according to any one of the preceding claims wherein the particulate carrier is at least one inorganic particulate carrier selected from SiO₂, Al₂O₃, MgO, ZrO₂, TiO₂, B₂O₃, CaO, ZnO, BaO and ThO₂.
Claim 9
Dependent Claim
35 words
A process according to any one of claims 1 to 7 wherein the particulate carrier is at least one solid organic compound selected from polyolefins, polyesters, polyamides, polyvinyl halides, polyalkyl methacrylates, polyalkyl acrylates and polystyrenes.
Claim 10
Dependent Claim
21 words
A process according to claim 8 or 9 wherein the particulate carrier has a particle diameter of 5 to 200 micrometers.
Claim 11
Dependent Claim
19 words
A process according to claim 10 wherein the particulate carrier has a particle diameter or 10 to 150 micrometers.
Claim 12
Dependent Claim
19 words
A process according to claim 10 wherein the particulate carrier has a particle diameter of 20 to 100 micrometers.
Claim 13
Dependent Claim
43 words
A process according to any one of the preceding claims wherein the solvent in which the aluminoxane is insoluble or sparingly soluble is at least one aliphatic hydrocarbon having 4 to 16 carbon atoms or alicyclic hydrocarbon having 5 to 16 carbon atoms.
Claim 14
Dependent Claim
32 words
A process according to any one of the preceding claims wherein the aluminoxane solution is a solution of the aluminoxane in at least one aromatic hydrocarbon having 6 to 16 carbon atoms.
Claim 15
Dependent Claim
23 words
Use of a solid catalyst produced by a process as claimed in any one of the preceding claims in the polymerization of olefins.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.