Process for cleaning mercury-containing gaseous emissions
CA 1233965 A · Owner: Tokyo Metropolitan Environmental Service Corporation · Inventors: Kokado, Masayuki; Ide, Akira; Shigenaka, Tsutomu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for cleaning gaseous emissions containing mercury (Hg) comprises the steps of adding a chlorinecontaining material to the mercury-containing gaseous emissions and heating the mixture to convert the mercury into water-soluble mercuric chloride (HgCl2); scrubbing the water-soluble mercuric chloride with wash water and fixing the same as chlorocomplex ion (HgCl4-2) stable in liquid; and thereafter subjecting the washings from the scrubbing step to coagulating sedimentation and thereby fixing and insolubilizing the mercury in the resulting sludge.
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 March 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 2005.
- 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.