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ID 116059
著者
Imanishi, Kenta Tokushima University
Liu, Jhy-Chern National Taiwan University of Science and Technology
Satou, Hidetoshi Shimonoseki Mitsui Chemicals
Yamamoto, Takaiku Hokusho|Kyoto University
キーワード
Dephosphorization Slag
Recovery of Phosphorus
Phosphoric Acid
Calcium Phosphate
Hydroxyapatite
資料タイプ
学術雑誌論文
抄録
We previously reported that by adding aqueous ammonia to the nitric acid extract of dephosphorization slag, a solid with enhanced concentrations of calcium and phosphorus, could be recovered. The present study shows that a considerable amount of manganese and iron also remains, however, which creates difficulties in directly reusing the recovered solid. The recovered material was again dissolved in nitric acid and the resultant filtrate was passed through a cation exchange resin that mostly removed various cations from the yield of an aqueous phosphoric acid solution. The recovery of phosphoric acid was confirmed via 31P NMR. Furthermore, when calcium nitrate was added to this aqueous solution, calcium hydroxyapatite, which was converted to calcium phosphate after the calcination at 1073 K. Phosphoric acid, calcium hydroxyapatite, and calcium phosphate are raw materials that are used to produce various industrial products containing phosphorus, and the suggested process greatly improves the technology for recovering phosphorus-containing materials that are mostly used as fertilizer.
掲載誌名
Journal of Chemical Engineering of Japan
ISSN
00219592
cat書誌ID
AA00709658
出版者
The Society of Chemical Engineers, Japan
54
8
開始ページ
467
終了ページ
471
発行日
2021-08-20
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
著者版
部局
理工学系