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Expired Canadian patentCanada

Process for the separation and recovery of boron compounds from a geothermal brine

CA 1301426 C · Owner: Bellini, Angelo · Inventors: Bellini, Angelo; Bruzzi, Vittorio

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Abstract From the Canadian patent

CASE 2426, "PROCESS FOR THE SEPARATION AND RECOVERY OF BORON COMPOUNDS FROM A GEOTHERMAL BRINE", Abstract Boron compounds are separated and recovered from a geothermal brine, which additionally contains inorganic salts, such as sodium and potassium chlorides and sulphates, by means of a process comprising the following process steps:, a) pre-concentration of the geothermal brine by expansion up to room pressure, to to a pressure lower than room pressure;, b) concentration of the pre-concentrated brine coming, from the (a) step, by means of an osmotic treatment against a concentrated aqueos solution of recycled inorganic salts;, c) treatment of crystallization of the concentrated brine, …

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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.
FiledDecember 17, 1987
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301426 C
Classification (IPC)C10B35/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 17, 1987Patent grantedMay 26, 1992Term endedMay 26, 2009

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.