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公开(公告)号：US10322941B2
公开(公告)日：2019-06-18
申请号：US15435801
申请日：2017-02-17
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Kwang Deog Jung , Heung Yong Ha , Jun Woo Oh , Ho Yong Jo
Abstract: The present invention relates to a method and a process of preparing precipitated calcium carbonate of high purity by extracting calcium ion contained in an alkali ion-containing inorganic material such as mineral, steelmaking slag and waste concrete with the use of an acidic aqueous solution, separating other metal ions from the extracted solution, preparing an alkaline earth metal hydroxide using an alkaline aqueous solution and then contacting the same with carbon dioxide.
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