Patent EP0426643A1 successfully refreshed from Google Patents.
EP0426643A1
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EP
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Process for the preparation of metallocenes
Assignee: TotalEnergies Onetech Belgium SA
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Filing: 1990-10-30
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Granted: —
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Expires: 2010-10-30
Abstract
Abstract A transition metal salt and powder of the solid reaction product of the ligand with an alkyllithium are reacted at room temperature in a non-polar liquid hydrocarbon. The metallocene thus obtained has a sufficient purity for subsequent use as catalyst for the polymerisation of olefins without further purification.
Inventors
- 👤 Abbas Razavi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
C; C07; C07F; C07F17/00; C08; C08F; C08F10/00; C08F110/00; C08F110/04; C08F110/06; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/639; C08F4/63912; C08F4/6392; C08F4/63922; C08F4/63927
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
47 words
Process for the preparation of metallocenes, comprising the steps of (i) reacting (a) a transition metal salt and (b) powder of the solid reaction product of the ligand with an alkyllithium in a non-polar hydrocarbon liquid; and (ii) recovering a solid mixture of lithium salt and metallocene.
Claim 2
Dependent Claim
47 words
Process for the preparation of metallocenes, comprising the steps of (i) reacting (a) a transition metal salt and (b) powder of the solid reaction product of the ligand with an alkyllithium in a non-polar hydrocarbon liquid; and (ii) recovering a solid mixture of lithium salt and metallocene.
Claim 3
Dependent Claim
17 words
Process according to claim 1, wherein the transition metal is selected from groups 4, 5 and 6.
Claim 4
Dependent Claim
22 words
Process according to claim 2, wherein the transition metal is selected from the group consisting of Ti, Zr, Hf, V and Cr.
Claim 5
Dependent Claim
13 words
Process according to claim 1, wherein the transition metal salt is a halide.
Claim 6
Dependent Claim
36 words
Process according to claim 1, wherein the ligand is selected from the group consisting of cyclopentadiene, substituted cyclopentadienes, and bridged dicyclopentadienes where in each cyclopentadiene may be equal or different and may be subsituted or not.
Claim 7
Dependent Claim
19 words
Process according to claim 1, wherein the non-polar hydrocarbon liquid is an alkane having 3 to 12 carbon atoms.
Claim 8
Dependent Claim
19 words
Process according to claim 6, wherein the non-polar hydrocarbon liquid is an alkane having 4 to 6 carbon atoms.
Claim 9
Dependent Claim
12 words
Process according to claim 7, wherein the non-polar hydrocarbon liquid is pentane.
Claim 10
Dependent Claim
19 words
Process according to claim 1, wherein step (i) is carried out at a temperature of from -20°C to +100°C.
Claim 11
Dependent Claim
19 words
Process according to claim 9, wherein step (i) is carried out at a temperature of from 0°C to 60°C.
Claim 12
Dependent Claim
17 words
Process according to claim 10, wherein step (i) is carried out at a temperature of about 25°C.
References Cited (Backward Citations)
EP0284707A1
Cited
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