Treating sludges and soil materials contaminated with hydrocarbons
CA 1301693 C · Owner: Beer, Gary Lee · Inventors: Li, Ying Hsiao; Beer, Gary Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Oily sludges containing volatile hydrocarbons are mixed with diatomaceous earth or perlite in a system which includes an indirect dryer for vaporizing liquids have a boiling point of less than about 700°F. Dried solids are discharged from the dryer and conveyed to an oxidation unit comprising a rotary kiln or lift pipe combustor. Dried hydrocarbon free solids are recirculated for mixing with the oily sludge and condensable vapors are condensed and separated for further use or disposal. A system including the indirect dryer condenser, oxidation unit, separators for the condensate and separators for gaseous products can be modified to receive hydrocarbon contaminated soils and other …
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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.