Method of removing pyritic sulphur from coal
CA 1325067 C · Owner: Croteau, Serge · Inventors: Capes, Charles E.; Coleman, Richard D.; Croteau, Serge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, "A Method of Removing Pyritic Sulphur from Coal" INVENTORS, Richard D. Coleman, Serge Croteau Charles E. Capes, ABSTRACT OF DISCLOSURE Pyritic sulphur is removed from coal by mixing agglomerating oil with a slurry of the coal containing discrete particles of carbonaceous material and pyritic sulphur, and other mineral matter that may be present, the oil being added in an amount less than about 3 wt % of the total solids present in the slurry, and then micro-agglomerating the carbonaceous particles. Pyritic sulphur while showing a tendency to be, hydrophobic and having an affinity for the agglomerating oil is weaker, in either of these properties than carbonaceous coal and so by …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 7, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.