Title:
A recovery method for performing calcium extraction and PCC manufacture continuously
Document Type and Number:
Japanese Patent JP5908992
Kind Code:
B2
Abstract:
A method of mineralizing calcium from industrial waste comprising extracting calcium ions from a suspension of calcium rich granular particles and aqueous ammonium chloride to form a calcium-rich first fraction and a heavy second fraction. The heavy second fraction is separated from the first fraction and the calcium-rich first fraction is carbonated with a gas comprising carbon dioxide to form a suspension of precipitated calcium carbonate and aqueous ammonium chloride. The precipitate is separated from the aqueous ammonium chloride by centrifugal means and the separated heavy second fraction comprises an enriched weight percent of iron.
Inventors:
Frank A. Carvers
Application Number:
JP2014548947A
Publication Date:
April 26, 2016
Filing Date:
December 21, 2012
Export Citation:
Assignee:
COREX MATERIALS, INC.
International Classes:
C22B26/20
Domestic Patent References:
| JP2011523615A |
Attorney, Agent or Firm:
Okada International Patent Office
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