Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1983-12-16
1984-12-18
Williams, Howard S.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204158HE, 204162R, 204162HE, B01J 1912
Patent
active
044889526
ABSTRACT:
A method of removing sulphur from coal prior to burning of the coal is the subject of the present invention. The coal is first comminuted to a size of no more than one inch and preferably one-half inch in diameter. The coal particles are placed in a reaction chamber in an aqueous suspension to which is added an inorganic base capable of reacting with hydrogen sulphide in order to neutralize the latter, such base preferably being calcium hydroxide. A photoelectric catalyst, characterized by structural imperfections to provide active sites for supporting a free radical reaction, is also introduced into the reaction chamber. The coal is then subjected to electromagnetic irradiation of a specific energy level in order to create a free radical reaction which results in removal of the sulphur from the coal. The coal is then cleaned and separated from the aqueous media, and the inorganic base and elemental sulphur are removed from the aqueous media.
REFERENCES:
patent: 4177120 (1979-12-01), Zenty
patent: 4406762 (1983-09-01), Ray et al.
Research Manufacturing Consultation Corporation
Williams Howard S.
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