EP0208561A2
Expired / Lapsed
EP
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Process for the preparation of alumoxanes
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1986-07-11
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Granted: —
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Expires: 2006-07-11
Abstract
Abstract A process for the preparation of oligomeric, linear and/or cyclic hydrocarbylalumoxanes comprises contacting a hydrocarbylaluminum dissolved in an inert dry organic liquid with a hydrated salt of a metal which is not reduced during contact with the trihydrocarbylaluminum at temperatures between -30°C and 110°C.
Inventors
- 👤 Erik Gustaf Marcus Tornqvist
- 👤 Howard Curtis Welborn, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 03:44
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/10; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08F; C08F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A process for the preparation of oligomeric, linear and/or cyclic hydrocarbylalumoxanes which comprises contacting at a temperature of from -30° C to 110° C an hydrocarbylamuminum dissolved in an inert dry organic liquid with a hydrated salt of a metal which is not reduced during contact with the hydrocarbylaluminum at said temperatures.
Claim 2
Dependent Claim
52 words
A process for the preparation of oligomeric, linear and/or cyclic hydrocarbylalumoxanes which comprises contacting at a temperature of from -30° C to 110° C an hydrocarbylamuminum dissolved in an inert dry organic liquid with a hydrated salt of a metal which is not reduced during contact with the hydrocarbylaluminum at said temperatures.
Claim 3
Dependent Claim
12 words
The process in accordance with Claim 1 wherein the hydrocarbylaluminum is trialkylaluminum.
Claim 4
Dependent Claim
12 words
The process in accordance with Claim 2 wherein the trialkylaluminum is trimethylaluminum.
Claim 5
Dependent Claim
19 words
The process in accordance with any one of the preceding claims wherein the inert solvent is aliphatic or aromatic.
Claim 6
Dependent Claim
17 words
The process in accordance with Claim 4 wherein the solvent is selected from toluene, hexane, and heptane.
Claim 7
Dependent Claim
24 words
The process in accordance with any one of the preceding claims wherein the hydrated metal salt is selected from MgSO₄·7H₂O, ZnSO₄·7H₂O, Na₂SO₄·10H₂O and N₃PO₄·12H₂O.
Claim 8
Dependent Claim
19 words
The process in accordance with any one of claims 1 to 5 wherein the hydrated metal salt is FeSO₄·7H₂O.
Claim 9
Dependent Claim
34 words
The process in accordance with any one of the preceding claims wherein the molar ratio between the hydrocarbylaluminum and the hydrated metal salt calculated on the amount of water is from 1:0.8 to 1:2.
Claim 10
Dependent Claim
21 words
The process in accordance with claim 8 wherein the molar ratio between the hydrocarbylaluminum and the hydrated metal salt is 1:1.4.
Claim 11
Dependent Claim
33 words
In a process for the polymerization of polyolefins, the improvement comprising employing an alumoxane as a co-catalyst wherein the alumoxane is prepared by the process according to any one of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
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