Patent US3783895A successfully refreshed from Google Patents.
US4300994A
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Method for producing coke
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-06-30
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Granted: 1981-11-17
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Expires: 2000-06-30
Abstract
Abstract Disclosed is a method for improving the caking properties of coals by use of quaternary base solutions. Caking properties of various coals can be upgraded for the production of metallurgical grade coke, preferably with a substantially reduced mineral matter content.
Inventors
- 👤 Ronald Liotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:55
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; C10G1/006; C10L; C10L9/00; C10L9/02
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
137 words
A method for improving the caking properties of coal or peat, which method comprises: (a) treating the coal with a quaternary base solution, and (b) by pyrolysing the treated coal at a temperature from about 400° C. to about 600° C., wherein the quaternary base solution contains at least one quaternary base represented by the formula: R.sub.4 MOR' where each R is the same or different group selected from the C 1 to C 20 alkyl, aryl, acyl, arylalkyl, alkylaryl, ether, ester, as well as, sulfide, amine, heteroatoms of silicon, selenium or a metal selected from Groups IA and IIA of the Periodic Table of the Elements, M is selected from Group VA of the Periodic Table of the Elements, and R' is hydrogen or a C 1 to C 20 alkyl, aryl, arylalkyl or alkylaryl group.
Claim 2
Independent Claim
137 words
A method for improving the caking properties of coal or peat, which method comprises: (a) treating the coal with a quaternary base solution, and (b) by pyrolysing the treated coal at a temperature from about 400° C. to about 600° C., wherein the quaternary base solution contains at least one quaternary base represented by the formula: R.sub.4 MOR' where each R is the same or different group selected from the C 1 to C 20 alkyl, aryl, acyl, arylalkyl, alkylaryl, ether, ester, as well as, sulfide, amine, heteroatoms of silicon, selenium or a metal selected from Groups IA and IIA of the Periodic Table of the Elements, M is selected from Group VA of the Periodic Table of the Elements, and R' is hydrogen or a C 1 to C 20 alkyl, aryl, arylalkyl or alkylaryl group.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein each R is the same or different C 1 to C 6 alkyl or aryl group.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein each R is the same or different C 1 to C 4 alkyl group.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein M is selected from the group consisting of nitrogen and phosphorus.
Claim 6
Dependent Claim
17 words
The method of claim 3 wherein M is selected from the group consisting of nitrogen and phosphorus.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein R' is hydrogen or a C 1 to C 4 alkyl group.
Claim 8
Dependent Claim
9 words
The method of claim 6 wherein R' is hydrogen.
Claim 9
Dependent Claim
9 words
The method of claim 5 wherein R' is hydrogen.
Claim 10
Dependent Claim
28 words
The method of claim 1 wherein the quaternary base is regenerated and recycled from the trisubstituted Group VA compound which is a by-product of the instantly claimed method.
Claim 11
Dependent Claim
28 words
The method of claim 7 wherein the quaternary base is regenerated and recycled from the trisubstituted Group VA compound which is a by-product of the instantly claimed method.
Claim 12
Dependent Claim
13 words
The method of claim 1 wherein the coal is a non-caking subbituminous coal.
Claim 13
Dependent Claim
16 words
The method of claim 1 wherein the coal is a weakly or moderately caking bituminous coal.
Claim 14
Dependent Claim
21 words
The method of claim 1 wherein prior to pyrolysis, the coal is treated with an organic solvent to extract soluble coal.
Claim 15
Dependent Claim
27 words
The method of claim 1 wherein at least a stoichiometric amount of quaternary base is employed based on the total number of acidic sites on the coal.
Claim 16
Dependent Claim
27 words
The method of claim 10 wherein at least a stoichiometric amount of quaternary base is employed based on the total number of acidic sites on the coal.
Claim 17
Independent Claim
159 words
A method for producing a coke having improved cake properties and having a substantially reduced level of mineral matter content, the method which comprises: (a) treating a coal or peat with a solution containing at least one or more quaternary bases; (b) physically separating mineral matter from the solution containing the treated coal; and (c) pyrolyzing the treated coal at a temperature from wherein the quaternary base solution contains at least one quaternary base represented by the formula: R.sub.4 MOR' where each R is the same or different group selected from the C 1 to C 20 alkyl, aryl, acyl, arylalkyl, alkylaryl, ether, ester, as well as, sulfide, amine, heteroatoms of silicon, selenium or a metal selected from Groups IA and IIA of the Periodic Table of the Elements, M is selected from Group VA of the Periodic Table of the Elements, and R' is hydrogen or a C 1 to C 20 alkyl, aryl, arylalkyl or alkylaryl group.
Claim 18
Independent Claim
159 words
A method for producing a coke having improved cake properties and having a substantially reduced level of mineral matter content, the method which comprises: (a) treating a coal or peat with a solution containing at least one or more quaternary bases; (b) physically separating mineral matter from the solution containing the treated coal; and (c) pyrolyzing the treated coal at a temperature from wherein the quaternary base solution contains at least one quaternary base represented by the formula: R.sub.4 MOR' where each R is the same or different group selected from the C 1 to C 20 alkyl, aryl, acyl, arylalkyl, alkylaryl, ether, ester, as well as, sulfide, amine, heteroatoms of silicon, selenium or a metal selected from Groups IA and IIA of the Periodic Table of the Elements, M is selected from Group VA of the Periodic Table of the Elements, and R' is hydrogen or a C 1 to C 20 alkyl, aryl, arylalkyl or alkylaryl group.
Claim 19
Dependent Claim
22 words
The method of claim 16 wherein each R is the same or different C 1 to C 6 alkyl or aryl group.
Claim 20
Dependent Claim
20 words
The method of claim 17 wherein each R is the same or different C 1 to C 4 alkyl group.
Claim 21
Dependent Claim
17 words
The method of claim 16 wherein M is selected from the group consisting of nitrogen and phosphorus.
Claim 22
Dependent Claim
17 words
The method of claim 18 wherein M is selected from the group consisting of nitrogen and phosphorus.
Claim 23
Dependent Claim
18 words
The method of claim 16 wherein R' is hydrogen or a C 1 to C 4 alkyl group.
Claim 24
Dependent Claim
9 words
The method of claim 21 wherein R' is hydrogen.
Claim 25
Dependent Claim
9 words
The method of claim 20 wherein R' is hydrogen.
Claim 26
Dependent Claim
33 words
The method of claim 16 wherein the mineral matter is separated from the organic portion of the coal or peat by a technique selected from the group consisting of sink-floatation, froath-floatation and centrifugation.
Claim 27
Dependent Claim
22 words
The method of claim 23 wherein the mineral matter is separated from the organic portion of the coal or peat by sink-floatation.
Claim 28
Dependent Claim
25 words
The method of claim 16 wherein the temperature at which the coal is contacted with the quaternary base is about 0° to about 100° C.
Claim 29
Dependent Claim
25 words
The method of claim 25 wherein the coal or peat is contacted with the quaternary base at a temperature from about 0° to 100° C.
Claim 30
Dependent Claim
31 words
The method of claim 16 in which steps (a) and (b) are repeated at least one more time to effect the removal of additional amounts of mineral matter from the coal.
Claim 31
Dependent Claim
31 words
The method of claim 27 in which steps (a) and (b) are repeated at least one more time to effect the removal of additional amounts of mineral matter from the coal.
Claim 32
Dependent Claim
28 words
The method of claim 16 wherein a stoichiometric amount of quaternary base is employed based on the amount of available acidic proton content of the coal or peat.
Claim 33
Dependent Claim
28 words
The method of claim 29 wherein a stoichiometric amount of quaternary base is employed based on the amount of available acidic proton content of the coal or peat.
Claim 34
Dependent Claim
13 words
The method of claim 16 wherein the coal is a non-caking subbituminous coal.
Claim 35
Dependent Claim
16 words
The method of claim 16 wherein the coal is a weakly or moderately caking bituminous coal.
Claim 36
Dependent Claim
21 words
The method of claim 16 wherein prior to pyrolysis, the coal is treated with an organic solvent to extract soluble coal.
Claim 37
Dependent Claim
21 words
The method of claim 31 wherein prior to pyrolysis, the coal is treated with an organic solvent to extract soluble coal.
Claim 38
Dependent Claim
28 words
The method of claim 16 wherein the quaternary base is regenerated and recycled from the trisubstituted Group VA compound which is a by-product of the instantly claimed method.
Claim 39
Dependent Claim
28 words
The method of claim 35 wherein the quaternary base is regenerated and recycled from the trisubstituted Group VA compound which is a by-product of the instantly claimed method.
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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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |