Title:
CALCIUM CARBONATE RECOVERY METHOD, CALCIUM CARBONATE RECOVERY DEVICE, AND CALCIUM CARBONATE RECOVERY PROGRAM
Document Type and Number:
WIPO Patent Application WO/2024/090056
Kind Code:
A1
Abstract:
A calcium carbonate recovery device 8 comprises: an alkaline aqueous solution generation unit 81 that generates an alkaline aqueous solution containing calcium hydroxide by adding water to combustion ash containing calcium carbonate and calcium oxide and/or calcium hydroxide and dissolving the calcium oxide and/or calcium hydroxide in the water; a residue separation unit 82 that separates a solid residue containing calcium carbonate from the alkaline aqueous solution; a calcium carbonate elution unit 83 that adds carbon dioxide to the residue and thereby elutes the calcium carbonate; and a calcium carbonate precipitation unit 85 that adds the alkaline aqueous solution to the eluted calcium carbonate and thereby causes solid calcium carbonate to be precipitated.
Inventors:
KATSUTA NAOKO (JP)
Application Number:
PCT/JP2023/032914
Publication Date:
May 02, 2024
Filing Date:
September 08, 2023
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
International Classes:
C01F11/18; B09B3/70; C04B2/02; B09B101/30
Foreign References:
| JP2006083017A | 2006-03-30 | |||
| JP2021154231A | 2021-10-07 |
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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