Patent US4533086A successfully refreshed from Google Patents.
US4533086A
Expired / Lapsed
US
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Process for grinding graphite
Assignee: Atlantic Richfield Co
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Filing: 1982-12-27
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Granted: 1985-08-06
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Expires: 2002-12-27
Abstract
Abstract Disclosed is a process for grinding graphite comprising: (1) forming a mixture of graphite and a graphite grinding aid; (2) grinding the mixture of graphite and graphite grinding aid to reduce the size of the graphite; (3) forming an aqueous slurry of the graphite particles, graphite grinding aid and water; (4) adding an amount of hydrocarbon oil to the aqueous slurry with agitation to form graphite-oil agglomerates; (5) separating the graphite-oil agglomerates from the grinding aid and water; and (6) removing hydrocarbon oil from the graphite-oil agglomerates to provide graphite particles reduced in size.
Inventors
- 👤 Jack D. Junttila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:20
CPC Classifications
B; B02; B02C; B02C23/00; B02C23/06; B02C19/00; B02C19/0056; C; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A process for grinding graphite comprising: (1) forming a mixture of graphite and a graphite grinding aid; (2) grinding the mixture of graphite and graphite grinding aid to reduce the size of the graphite; (3) forming an aqueous slurry of the graphite particles, graphite grinding aid and water; (4) adding an amount of hydrocarbon oil to the aqueous slurry with agitation to form graphite-oil agglomerates; (5) separating the graphite-oil agglomerates from the grinding aid and water; and (6) removing hydrocarbon oil from the graphite-oil agglomerates to provide graphite particles reduced in size.
Claim 2
Dependent Claim
92 words
A process for grinding graphite comprising: (1) forming a mixture of graphite and a graphite grinding aid; (2) grinding the mixture of graphite and graphite grinding aid to reduce the size of the graphite; (3) forming an aqueous slurry of the graphite particles, graphite grinding aid and water; (4) adding an amount of hydrocarbon oil to the aqueous slurry with agitation to form graphite-oil agglomerates; (5) separating the graphite-oil agglomerates from the grinding aid and water; and (6) removing hydrocarbon oil from the graphite-oil agglomerates to provide graphite particles reduced in size.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the mixture of a graphite and graphite grinding aid comprise from about 100 parts graphite and from about 2 to 40 parts, by weight, graphite grinding aid.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein the graphite grinding aid has a Mohs hardness greater than 6.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the aqueous slurry contains from about 5% to about 50%, by weight of the aqueous slurry, of graphite.
Claim 6
Dependent Claim
25 words
The process of claim 1 wherein the graphite grinding aid is selected from the group comprising sand, mineral matter liberated from graphite, and mixtures thereof.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the hydrocarbon oil is derived from petroleum, shale, oil, tar sand and coal.
Claim 8
Dependent Claim
39 words
The process of claim 1 wherein the hydrocarbon oil is selected from the group consisting of light cycle oil, heavy cycle oil, heavy gas oil, clarified oil, kerosene, heavy vacuum gas oil, residual oil, coal tar, and mixtures thereof.
Claim 9
Dependent Claim
17 words
The process of claim 1 wherein the graphite-oil agglomerates contain from about 1% to about 25% oil.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the graphite-oil agglomerates contain from about 15% to about 30% oil.
Claim 11
Dependent Claim
17 words
The process of claim 1 wherein the graphite grinding aid has a Mohs hardness greater than 3.
Claim 12
Dependent Claim
93 words
A process for grinding graphite comprising: (1) forming a mixture of graphite and a graphite grinding aid; (2) ball milling the mixture of graphite and graphite grinding aid to reduce the size of the graphite; (3) forming an aqueous slurry of the graphite particles, graphite grinding aid and water; (4) adding an amount of hydrocarbon oil to the aqueous slurry with agitation to form graphite-oil agglomerates; (5) separating the graphite-oil agglomerates from the grinding aid and water; and (6) removing hydrocarbon oil from the graphite-oil agglomerates to provide graphite particles reduced in size.
Claim 13
Dependent Claim
93 words
A process for grinding graphite comprising: (1) forming a mixture of graphite and a graphite grinding aid; (2) ball milling the mixture of graphite and graphite grinding aid to reduce the size of the graphite; (3) forming an aqueous slurry of the graphite particles, graphite grinding aid and water; (4) adding an amount of hydrocarbon oil to the aqueous slurry with agitation to form graphite-oil agglomerates; (5) separating the graphite-oil agglomerates from the grinding aid and water; and (6) removing hydrocarbon oil from the graphite-oil agglomerates to provide graphite particles reduced in size.
References Cited (Backward Citations)
US3677476A
Cited
US4248697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |