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Method and system for generating calcium carbonate
Provided are a method and system for producing calcium carbonate with which high-purity calcium carbonate can be produced using calcium-containing waste. A calcium carbonate production method for producing calcium carbonate from calcium-containing waste, characterized by comprising: a calcium dissolution step for adding hydrochloric acid water to the calcium-containing waste to dissolve calcium and produce an aqueous solution containing calcium ions; a separation step in which the hydrogen ion concentration index of the aqueous solution containing the calcium ions is adjusted, and a component containing at least one selected from the group consisting of Si, Al, Mg, and a heavy metal is separated from the aqueous solution; and a calcium carbonate recovery step for producing calcium carbonate using the aqueous solution obtained in the separation step and an aqueous solution containing potassium carbonate and/or sodium carbonate.
本发明提供一种能够利用含钙废弃物生成高纯度的碳酸钙的碳酸钙的生成方法及系统。一种碳酸钙的生成方法，其由含钙废弃物生成碳酸钙，其特征在于，包括：钙溶解工序，在含钙废弃物中添加盐酸水，使钙溶解，生成包含钙离子的水溶液；分离工序，调整含有所述钙离子的水溶液的氢离子浓度指数，从该水溶液中分离包含选自包括Si、Al、Mg及重金属的组中的至少一种的成分；及碳酸钙回收工序，使用经由该分离工序获得的水溶液及包含碳酸钾和/或碳酸钠的水溶液，生成碳酸钙。
Method and system for generating calcium carbonate
Provided are a method and system for producing calcium carbonate with which high-purity calcium carbonate can be produced using calcium-containing waste. A calcium carbonate production method for producing calcium carbonate from calcium-containing waste, characterized by comprising: a calcium dissolution step for adding hydrochloric acid water to the calcium-containing waste to dissolve calcium and produce an aqueous solution containing calcium ions; a separation step in which the hydrogen ion concentration index of the aqueous solution containing the calcium ions is adjusted, and a component containing at least one selected from the group consisting of Si, Al, Mg, and a heavy metal is separated from the aqueous solution; and a calcium carbonate recovery step for producing calcium carbonate using the aqueous solution obtained in the separation step and an aqueous solution containing potassium carbonate and/or sodium carbonate.
本发明提供一种能够利用含钙废弃物生成高纯度的碳酸钙的碳酸钙的生成方法及系统。一种碳酸钙的生成方法，其由含钙废弃物生成碳酸钙，其特征在于，包括：钙溶解工序，在含钙废弃物中添加盐酸水，使钙溶解，生成包含钙离子的水溶液；分离工序，调整含有所述钙离子的水溶液的氢离子浓度指数，从该水溶液中分离包含选自包括Si、Al、Mg及重金属的组中的至少一种的成分；及碳酸钙回收工序，使用经由该分离工序获得的水溶液及包含碳酸钾和/或碳酸钠的水溶液，生成碳酸钙。
Method and system for generating calcium carbonate
碳酸钙的生成方法及系统
KIKUCHI SADAHITO (author) / NAKAMURA SHOGO (author) / OIZUMI RISA (author) / KONISHI MASAYOSHI (author) / HIGA MITSURU (author) / TANIGUCHI IKUO (author)
2024-04-16
Patent
Electronic Resource
Chinese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
B09B
DISPOSAL OF SOLID WASTE
,
Beseitigung von festem Abfall
/
C01D
Verbindungen der Alkalimetalle, d.h. des Lithiums, Natriums, Kaliums, Rubidiums, Cäsiums oder Franciums
,
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
/
C04B
Kalk
,
LIME
| European Patent Office | 2024
| European Patent Office | 2017