Process for bituminizing radioactive waste constituted by cation and/or anion exchange resins
CA 1266768 C · Owner: Lefillatre, Guy · Inventors: Lefillatre, Guy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for bituminizing radioactive waste constituted by cation and/or anion exchange resins. This process comprises a resin pretreatment stage performed so as to replace the H+ ions of the cation exchange resins by ions chosen from the group including Ca++, Sr++ and Ba++ and/or for replacing the OH- and/or Cl- ions of the anion exchange resins by an anion chosen from the group including NO?, HCO? and CH3CO?. This pretreatment makes it possible to increase the capacity of the coating installation and limit the swelling in water of the bituminized coatings obtained.
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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 March 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2007.
- 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.