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US4988800A
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Preparation of rare earth alkoxides using catalyst
Assignee: Akzo America Inc
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Filing: 1988-05-31
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Granted: 1991-01-29
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Expires: 2008-05-31
Abstract
Abstract The reaction of rare earth metals and alcohols, to form rare earth alkoxides, is catalyzed by the use of an inorganic, halide-free mercury salt (e.g., mercury nitrate or mercury sulfate).
Inventors
- 👤 Carl C. Greco
- 👤 Johst H. Burk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:08
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/68; C07C29/70; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/734
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
38 words
A catalytic process for the manufacture of rare earth alkoxides by the reaction of a rare earth metal and an alcohol in the presence of a catalytically effective amount of an inorganic, halide-free mercury salt for the reaction.
Claim 2
Dependent Claim
38 words
A catalytic process for the manufacture of rare earth alkoxides by the reaction of a rare earth metal and an alcohol in the presence of a catalytically effective amount of an inorganic, halide-free mercury salt for the reaction.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 wherein the mercury salt comprises a divalent anion derived from a strong mineral acid.
Claim 4
Dependent Claim
25 words
A process as claimed in claim 2 wherein the mercury salt is present at from about 0.1% to about 1.0% by weight of the reactants.
Claim 5
Dependent Claim
15 words
A process as claimed in claim 1 wherein the mercury salt is mercury (II) sulfate.
Claim 6
Dependent Claim
15 words
A process as claimed in claim 1 wherein the mercury salt is mercury (II) nitrate.
Claim 7
Dependent Claim
53 words
A process as claimed in claim 1 wherein the mercury salt comprises a divalent anion derived from a strong mineral acid and is present at from about 0.1% to about 1.0% by weight of the reactants and the mole ratio of rare earth metal to alcohol is from about 1:3 to about 1:6.
Claim 8
Dependent Claim
15 words
A process as claimed in claim 6 wherein the mercury salt is mercury (II) sulfate.
Claim 9
Dependent Claim
15 words
A process as claimed in claim 6 wherein the mercury salt is mercury (II) nitrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |