Fuel and related compositions – Coal treating process or product thereof – Removal of undesirable
Patent
1992-11-24
1994-03-22
Pal, Asok
Fuel and related compositions
Coal treating process or product thereof
Removal of undesirable
44624, 44625, C10L 900, C10L 902
Patent
active
052960072
ABSTRACT:
A process for reducing the sulfur content of coal containing pyritic and organic sulfur comprising: contacting the coal with less than the molar stoichiometric amount of at least one +5 vanadium component and at least one reducible manganese component at selected conditions effective to oxidize at least a portion of the sulfur in the coal; reducing the sulfur content of the oxidized sulfur-containing coal; and recovering a coal product having a reduced sulfur content.
In another embodiment, the process involves the use of certain plant derived ortho-quinone containing components, in particular, certain lignin and/or tannin derived components containing ortho-quinone functionality, to oxidize at least a portion of at least one of the pyritic and organic sulfur materials in the coal.
Preferred compositions comprise at least one ligno sulfonate component containing ortho-quinone functionality. In the process, the use of at least one additional oxidant capable for maintaining the ortho-quinone containing functionality in the desired oxidation state provides for integrated process synergy.
REFERENCES:
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patent: 4105416 (1978-08-01), Burk, Jr. et al.
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patent: 4206288 (1980-06-01), Detz et al.
patent: 4305726 (1981-12-01), Brown, Jr.
patent: 4491454 (1985-01-01), Lompa-Krzymien
patent: 4522626 (1985-06-01), Espenscheid
Clough Thomas J.
Sibert John W.
Ensci Inc.
Pal Asok
Uxa, Jr. Frank J.
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