公开(公告)号：US09446273B2

公开(公告)日：2016-09-20

申请号：US14309706

申请日：2014-06-19

Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES

Inventor： Young-Nam Jang ,  Kyungsun Song ,  Myung Gyu Lee ,  Soo-Chun Chae ,  Hwanju Jo ,  Jun-Hwan Bang ,  Kyoung Won Ryu

IPC: A62D3/36 ,  B09B3/00 ,  A62D101/41

CPC classification number: A62D3/36 ,  A62D2101/41 ,  A62D2203/04 ,  B09B3/00 ,  B09B3/0066 ,  B09B3/0083

Abstract: Disclosed is a method of detoxifying asbestos of waste slate. The method includes concentrating the asbestos by introducing hydrochloric acid aqueous solution into waste slate powder to dissolve and remove a limestone component contained in the waste slate; and mixing the concentrated asbestos with oxalic acid and performing a low-temperature heat treatment. The waste slate is crushed and pulverized and powder of the crushed and pulverized waste slate is formed in a size in a range of 100 meshes to 300 meshes. The detoxified asbestos includes re-crystallized magnesium oxalate having a rhombohedral or amorphous shape.

Abstract translation: 公开了一种废石板石棉的解毒方法。 该方法包括通过将盐酸水溶液引入废石板粉中来浓缩石棉以溶解并除去废石板中所含的石灰石成分; 并将浓缩的石棉与草酸混合并进行低温热处理。 将废石板粉碎并粉碎，粉碎和粉碎的废石板的粉末形成在100目至300目的范围内的尺寸。 解毒石棉包括具有菱形或无定形形状的重结晶的草酸镁。

公开(公告)号：US10604894B2

公开(公告)日：2020-03-31

申请号：US15808125

申请日：2017-11-09

Applicant: Korea Institute Of Geoscience And Mineral Resources

Inventor： Chi-Wan Jeon ,  Sang-Won Park ,  Jun-Hwan Bang ,  Kyung-Sun Song ,  Seung-Woo Lee ,  Hwan-Ju Jo

IPC: D21C11/00 ,  D21H17/70

Abstract: The present invention provides a method of carbonating carbon dioxide with high purity using a paper mill waste sludge by preparing a paper mill waste sludge which is a waste product discharged during the production of papermaking, adding acid to the paper mill waste sludge and reacting the acid therewith to produce a mixed solution and stirring, separating a supernatant of the mixed solution into an eluate, adding a basic substance to the eluate and adjusting pH to precipitate some of the ions in the eluate, and then adding a reaction initiator to the eluate in which some ions are precipitated and removed, and injecting carbon dioxide for a carbonation reaction.