US4406664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the enhanced separation of impurities from coal and coal products produced therefrom
Assignee: Gulf and Western Industries Inc
•
Filing: 1981-05-28
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Granted: 1983-09-27
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Expires: 2001-05-28
Abstract
Abstract An improved process for the beneficiation of coal and the separation of impurities therefrom comprising subjecting coal to surface treatment by contact with an aqueous medium comprising polymerizable monomer, polymerization catalyst and liquid organic carrier, thereby rendering said coal hydrophobic and oleophilic, the improvement comprising the high shear intermixing of the surface treated coal with at least one water wash medium thereby providing for the removal of further hydrophilic impurities, such as mineral ash from the coal. Apparatus for carrying out the process and the products prepared therefrom are also provided.
Inventors
- 👤 Lester E. Burgess
- 👤 Karl M. Fox
- 👤 Phillip E. McGarry
- 👤 David E. Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:30
CPC Classifications
B; B03; B03D; B03D1/00; B03B; B03B9/00; B03B9/005; B03D1/001; B03D1/004; B03D1/006; B03D1/016; B03D3/00; B03D3/06; C; C10; C10L; C10L1/00; C10L1/32; C10L9/00; C10L9/10; B03D2201/00; B03D2201/007; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/08
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
92 words
In a process for beneficiating coal which comprises chemically surface treating coal in an aqueous medium containing a liquid organic carrier to render said coal hydrophobic and oleophilic, thereafter separating the coal phase from the ash containing water phase and recovering the hydrophobic and oleophilic coal phase, the improvement comprising subjecting the chemically treated coal to high shear intermixing with at least one aqueous wash medium, whereby ash and other hydrophilic impurities are released into the water and a hydrophobic and oleophilic coal phase floats upon and separates from a water phase.
Claim 2
Dependent Claim
92 words
In a process for beneficiating coal which comprises chemically surface treating coal in an aqueous medium containing a liquid organic carrier to render said coal hydrophobic and oleophilic, thereafter separating the coal phase from the ash containing water phase and recovering the hydrophobic and oleophilic coal phase, the improvement comprising subjecting the chemically treated coal to high shear intermixing with at least one aqueous wash medium, whereby ash and other hydrophilic impurities are released into the water and a hydrophobic and oleophilic coal phase floats upon and separates from a water phase.
Claim 3
Dependent Claim
37 words
The process of claim 1 wherein said high shear intermixing of said chemically treated coal with said aqueous wash medium is carried out by jetting said coal, under pressure, into at least one said aqueous wash medium.
Claim 4
Dependent Claim
25 words
The process of claim 2 wherein said chemically treated coal is jetted into said aqueous wash medium through one or more orifices of a nozzle.
Claim 5
Dependent Claim
23 words
The process of claim 2 wherein said coal phase is jetted into said aqueous wash medium under atomizing pressure through a spray nozzle.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein the floating hydrophobic coal phase is recovered and dried of water.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein said coal phase is dried by mechanical means.
Claim 8
Dependent Claim
11 words
The process of claim 6 wherein said mechanical means is centrifugation.
Claim 9
Dependent Claim
51 words
The process of claim 3 wherein jetting the chemically treated coal into said aqueous wash medium through one or more orifices of a nozzle induces air inclusion both in the passage of the coal through the nozzle and on impingement upon and into the air-water interface of the aqueous wash medium.
Claim 10
Dependent Claim
51 words
The process of claim 4 wherein jetting the chemically treated coal into said aqueous wash medium under atomizing pressure through a spray nozzle induces air inclusion both in the passage of the coal through the spray nozzle and on impingement upon and into the air-water interface of the aqueous wash medium.
Claim 11
Dependent Claim
10 words
The process of claim 1 wherein said coal is pulverized.
Claim 12
Dependent Claim
32 words
The process of claim 1 wherein said aqueous wash medium contains a member selected from the group consisting of a polymerizable monomer, a polymerization catalyst, a liquid organic carrier and mixtures thereof.
Claim 13
Dependent Claim
29 words
The process of claim 11 wherein said polymerizable monomer is corn oil, said polymerization catalyst is cupric nitrate and hydrogen peroxide and said liquid organic carrier is fuel oil.
Claim 14
Dependent Claim
32 words
The process of claim 4 wherein said aqueous wash medium contains a member selected from the group consisting of a polymerizable monomer, a polymerization catalyst, a liquid organic carrier and mixtures thereof.
Claim 15
Dependent Claim
29 words
The process of claim 13 wherein said polymerizable monomer is corn oil, said polymerization catalyst is cupric nitrate and hydrogen peroxide and said liquid organic carrier is fuel oil.
Claim 16
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 1.
Claim 17
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 2.
Claim 18
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 3.
Claim 19
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 4.
Claim 20
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 5.
Claim 21
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 6.
Claim 22
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 7.
Claim 23
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 8.
Claim 24
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 9.
Claim 25
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 10.
Claim 26
Dependent Claim
15 words
The beneficiated coal product prepared by the process of claims 11, 12, 13 or 14.
Claim 27
Dependent Claim
19 words
A coal-oil mixture comprised of an intimate blend of the beneficiated coal product of claim 1 and fuel oil.
Claim 28
Dependent Claim
23 words
The coal-oil mixture of claim 26 comprised of from about 1 part by weight coal to about 1 part by weight fuel oil.
Claim 29
Dependent Claim
19 words
A coal slurry comprising a mixture of the beneficiated coal product of claim 11 or 13 and a carrier.
Claim 30
Dependent Claim
11 words
The coal slurry of claim 28 wherein said carrier is water.
Claim 31
Dependent Claim
27 words
The process of claim 11 wherein said polymerization catalyst is selected from the groups consisting of a free radical catalyst, an anionic catalyst and a cationic catalyst.
Claim 32
Dependent Claim
11 words
The beneficiated coal product prepared by the process of claim 30.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-26 | 1987-03-28 | 1987-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-26 | 1991-03-28 | 1991-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-26 | 1995-03-28 | 1995-09-27 | $7700.00 | Window Closed / Lapsed |