Patent US5641468A successfully refreshed from Google Patents.
US5641468A
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Lithium manganese oxide compound and method of preparation
Assignee: Kerr McGee Chemical Corp
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Filing: 1995-09-07
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Granted: 1997-06-24
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Expires: 2015-09-07
Abstract
Abstract A method for manufacturing Li 2 Mn 2 O 4 comprising the steps of providing LiMn 2 O 4 ; providing a source of lithium; dissolving lithium from the lithium source in a liquid medium in which lithium generates solvated electrons or the reduced form of an electron-transfer catalyst; and contacting the LiMn 2 O 4 with the liquid medium containing the dissolved lithium and the solvated electrons or the reduced form of the electron-transfer catalyst.
Inventors
- 👤 Paul C. Ellgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; H01M4/505; C; C01; C01G; C01G45/00; C01G45/12; C01G45/1221; C01G45/1235; C01G45/1242; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2006/00; C01P2006/40; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
125 words
A method for manufacturing Li 2 Mn 2 O 4 comprising the steps of: (a) Providing LiMn 2 O 4 ; (b) Providing a source of elemental lithium; (c) Providing a liquid medium in which elemental lithium generates solvated electrons or the reduced form of an electron-transfer catalyst; (d) Dissolving the elemental lithium in the liquid medium; (e) Contacting the LiMn 2 O 4 with the liquid medium containing the dissolved elemental lithium and the solvated electrons or the reduced form of the electron-transfer catalyst; (f) Reacting the LiMn 2 O 4 with the dissolved elemental lithium to produce Li 2 Mn 2 O 4 product; and (g) Separating the Li 2 Mn 2 O 4 product formed in Step (f) from the liquid medium.
Claim 2
Independent Claim
125 words
A method for manufacturing Li 2 Mn 2 O 4 comprising the steps of: (a) Providing LiMn 2 O 4 ; (b) Providing a source of elemental lithium; (c) Providing a liquid medium in which elemental lithium generates solvated electrons or the reduced form of an electron-transfer catalyst; (d) Dissolving the elemental lithium in the liquid medium; (e) Contacting the LiMn 2 O 4 with the liquid medium containing the dissolved elemental lithium and the solvated electrons or the reduced form of the electron-transfer catalyst; (f) Reacting the LiMn 2 O 4 with the dissolved elemental lithium to produce Li 2 Mn 2 O 4 product; and (g) Separating the Li 2 Mn 2 O 4 product formed in Step (f) from the liquid medium.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein the liquid medium is selected from the group consisting of ammonia, organic amines, ethers, pyridine, substituted pyridines, mixtures of ammonia and amines, and mixtures of ammonia and ethers.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the liquid medium is ammonia.
Claim 5
Dependent Claim
25 words
The method of claim 3 wherein the temperature during the contacting step is maintained at from about minus 30° C. to about minus 50° C.
Claim 6
Dependent Claim
25 words
The method of claim 4 wherein the temperature during the contacting step is maintained at from about minus 33° C. to about minus 45° C.
Claim 7
Dependent Claim
13 words
The method of claim 2 wherein the liquid medium is an organic amine.
Claim 8
Dependent Claim
25 words
The method of claim 6 wherein the contacting step is carried out at a temperature of from about minus 25° C. to about 100° C.
Claim 9
Dependent Claim
24 words
The method of claim 7 wherein the contacting step is carried out at a temperature of from about 20° C. to about 90° C.
Claim 10
Dependent Claim
21 words
The method of claim 6 wherein the organic amine is selected from the group consisting of methylamines, ethylamines, propylamines and butylamines.
Claim 11
Dependent Claim
10 words
The method of claim 2 wherein the solvent is pyridine.
Claim 12
Dependent Claim
25 words
The method of claim 10 wherein the contacting step is carried out at a temperature of from about minus 5° C. to about 190° C.
Claim 13
Dependent Claim
24 words
The method of claim 11 wherein the contacting step is carried out at a temperature of from about 35° C. to about 125° C.
Claim 14
Dependent Claim
13 words
The method of claim 2 wherein the liquid medium is a substituted pyridine.
Claim 15
Dependent Claim
25 words
The method of claim 13 wherein the contacting step is carried out at a temperature of from about minus 5° C. to about 190° C.
Claim 16
Dependent Claim
24 words
The method of claim 14 wherein the contacting step is carried out at a temperature of from about 35° C. to about 165° C.
Claim 17
Dependent Claim
16 words
The method of claim 2 wherein the liquid medium is a mixture of ammonia and amines.
Claim 18
Dependent Claim
16 words
The method of claim 2 wherein the liquid medium is a mixture of ammonia and ethers.
Claim 19
Dependent Claim
11 words
The method of claim 2 wherein the solvent is an ether.
Claim 20
Dependent Claim
22 words
The method of claim 1 including the step of adding a catalyst to the LiMn 2 O 4 prior to step (b).
Claim 21
Dependent Claim
22 words
The method of claim 1 including the step of adding a catalyst to the LiMn 2 O 4 prior to step (c).
Claim 22
Dependent Claim
23 words
The method of claim 1 including the step of adding a catalyst to the LiMn 2 O 4 immediately prior to step (d).
Claim 23
Dependent Claim
22 words
The method of claim 1 including the step of adding a catalyst to the LiMn 2 O 4 immediately after step (d).
Claim 24
Dependent Claim
30 words
The method of claim 19 wherein the catalyst is selected from the group consisting of sulfur, sulfides, reducible sulfur compounds, iodine, iodides, reducible iodine compounds, pyridine, pyridine derivatives, and benzophenone.
Claim 25
Dependent Claim
30 words
The method of claim 20 wherein the catalyst is selected from the group consisting of sulfur, sulfides, reducible sulfur compounds, iodine, iodides, reducible iodine compounds, pyridine, pyridine derivatives, and benzophenone.
Claim 26
Dependent Claim
30 words
The method of claim 21 wherein the catalyst is selected from the group consisting of sulfur, sulfides, reducible sulfur compounds, iodine, iodides, reducible iodine compounds, pyridine, pyridine derivatives, and benzophenone.
Claim 27
Dependent Claim
30 words
The method of claim 22 wherein the catalyst is selected from the group consisting of sulfur, sulfides, reducible sulfur compounds, iodine, iodides, reducible iodine compounds, pyridine, pyridine derivatives, and benzophenone.
Claim 28
Dependent Claim
19 words
The method of claim 1 wherein the liquid medium is a solvent having an electron transfer catalyst dissolved therein.
Claim 29
Dependent Claim
22 words
The method of claim 27 wherein the liquid medium is a mixture of compounds which is a liquid at the reaction temperature.
Claim 30
Dependent Claim
30 words
The method of claim 27 wherein the catalyst is selected from the group consisting of sulfur, sulfides, reducible sulfur compounds, iodine, iodides, reducible iodine compounds, pyridine, pyridine derivatives, and benzophenone.
References Cited (Backward Citations)
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