Process and system for producing commercial quality carbon dioxide from recausticizing process calcium carbonates

  • US 9,994,453 B2
  • Filed: 01/22/2016
  • Issued: 06/12/2018
  • Est. Priority Date: 08/25/2006
  • Status: Active Grant
First Claim
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1. A system effective to recover carbon dioxide of 90% to +99% purity comprising a bubbling fluid bed calciner thermally linked by an apparatus or system to a circulating fluid bed combustor, and a dryer selected from the group consisting of a spray dryer and a flash dryer, wherein the dryer and the calciner operate in countercurrent gas/solids flow and wherein wet calcium carbonate is dried by exiting calciner gases and the resulting dry calcium carbonate is fed to the calciner.

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