公开(公告)号：US20240351902A1

公开(公告)日：2024-10-24

申请号：US18684820

申请日：2022-08-31

申请人： SUMITOMO OSAKA CEMENT CO., LTD. ,  YAMAGUCHI UNIVERSITY ,  KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION

发明人： Sadato KIKUCHI ,  Shogo NAKAMURA ,  Risa OIZUMI ,  Masayoshi KONISHI ,  Mitsuru HIGA ,  Ikuo TANIGUCHI

IPC分类号： C01F11/18 ,  B09B3/70 ,  B09B101/45 ,  C01B7/07 ,  C01D1/38 ,  C01D1/40 ,  C01D7/07

CPC分类号： C01F11/18 ,  B09B3/70 ,  C01B7/07 ,  C01D1/38 ,  C01D1/40 ,  C01D7/07 ,  B09B2101/45 ,  C01P2006/80

摘要： Provided is a calcium carbonate generation method and system in which calcium carbonate having a high purity can be generated using a calcium-containing waste. Provided is a calcium carbonate generation method of generating calcium carbonate from a calcium-containing waste, the calcium carbonate generation method including: a calcium dissolution step of adding aqueous hydrochloric acid to a calcium-containing waste and dissolving calcium to generate an aqueous solution containing a calcium ion; a separation step of adjusting a hydrogen ion concentration index of the aqueous solution containing a calcium ion and separating a component containing at least one selected from the group consisting of Si, Al, Mg, and heavy metal from the aqueous solution; and a calcium carbonate collection step of generating calcium carbonate using an aqueous solution obtained in the separation step and an aqueous solution containing potassium carbonate and/or sodium carbonate.