Process for removing sulfur from coal
CA 1102266 A · Owner: Atlantic Richfield Company · Inventors: Karch, John A.; Yoo, Jin S.; Burk, Emmett H. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for reducing the sulfur content of coal comprising the steps of:, 1) contacting coal particles with an aqueous solution of iron complexing agent, and an oxidant to preferentially oxidize at least a portion of the sulfur in the coal;, 2) contacting the oxidized sulfur-containing coal with at least one hydrogen donor material capable of transferring hydrogen to the oxidized sulfurcontaining coal under conditions such that hydrogen transfer occurs; and, 3) recovering coal products of reduced sulfur content.
Read the whole patent
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 June 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 1998.
- 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
Timeline From CIPO dates
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.