公开(公告)号：US20210130928A1

公开(公告)日：2021-05-06

申请号：US16633257

申请日：2018-07-27

Applicant: Korea Institute Of Geoscience And Mineral Resources

Inventor： Jin-Young LEE ,  Jung-Shin KANG ,  Hee-Nam KANG

IPC: C22B34/36 ,  C22B3/12 ,  C22B7/00 ,  C22B34/12 ,  C22B1/16

Abstract: The present invention provides a method for selective recovery of a valuable metal from a waste denitrification catalyst through alkali fusion, the method comprising the steps of: (a) adding an alkali metal to a waste denitrification catalyst, followed by mixing and alkali fusion, to generate a calcination product; (b) subjecting the calcination product to water-leaching to recover an alkali leachate and a residue; (c) adding a precipitator to the alkali leachate, followed by stirring, to recover calcium metavanadate (Ca(VO3)2) or calcium tungstate (CaWO4) through precipitation; and (d) subjecting the recovered calcium tungstate to acid decomposition to prepare tungstic acid. Therefore, vanadium and tungsten can be recovered at high efficiency by a method in which a precipitator is added to a leachate, which is obtained by adding an excess amount of an alkali metal to a waste denitrification catalyst and carrying out calcination and water-leaching, and then a reaction rate is controlled.

公开(公告)号：US20160102384A1

公开(公告)日：2016-04-14

申请号：US14787925

申请日：2014-04-28

Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES

Inventor： Jin-Young LEE ,  Kyeong-Woo CHUNG

IPC: C22B3/00 ,  C22B7/00 ,  C22B3/22 ,  C22B3/10 ,  C22B3/46

CPC classification number: C22B11/048 ,  C22B3/10 ,  C22B3/22 ,  C22B3/44 ,  C22B3/46 ,  C22B7/007 ,  Y02P10/214 ,  Y02P10/234

Abstract: The present invention relates to a method of recovering acid and a platinum group metal from a leaching solution of a spent catalyst, more particularly, to a method of recovering acid and a platinum group metal from a leaching solution of a spent catalyst, the method including: filtering a leaching solution of a spent catalyst, providing the filtered leaching solution into a concentration chamber, and heating the filtered leaching solution to recover acid included in the leaching solution; providing a concentrated solution of the leaching solution into a substitution chamber after recovering the acid, and adding a metal for a substitution reaction; and cleaning a solid, which is separated by solid-liquid separation after the substitution reaction, with acid and recovering the platinum group metal.

Abstract translation: 本发明涉及从废催化剂的浸出溶液中回收酸和铂族金属的方法，更具体地说，涉及从废催化剂的浸出溶液中回收酸和铂族金属的方法，该方法包括 过滤废催化剂的浸出溶液，将过滤的浸出溶液提供到浓缩室中，加热过滤的浸出溶液以回收浸出溶液中所含的酸; 在回收酸后，将浸出液浓缩溶液置于置换室中，加入金属进行取代反应; 并且用酸洗涤固化物，其通过固相分离在取代反应后分离并回收铂族金属。

公开(公告)号：US20170073795A1

公开(公告)日：2017-03-16

申请号：US15123624

申请日：2015-02-27

Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES

Inventor： Jin-Young LEE ,  Hoo-In LEE

IPC: C22B34/36 ,  C22B7/00 ,  C22B34/22

CPC classification number: C22B34/365 ,  C22B7/008 ,  C22B7/009 ,  C22B34/225 ,  Y02P10/214 ,  Y02P10/23 ,  Y02P10/234

Abstract: The present invention relates to a method for leaching precious metals contained in a waste denitrification catalyst by using a pressure leaching process, and more specifically, to a method for leaching precious metals contained in a waste denitrification catalyst by using a pressure leaching process, the method comprising the steps of: forming a mixture by mixing a waste denitrification catalyst with a sodium salt solution; and leaching vanadium and tungsten contained in the mixture by feeding the mixture into a sealed pressurized reactor, and then heating and stirring the mixture.

Abstract translation: 本发明涉及通过使用压力浸出方法来浸取废反硝化催化剂中所含的贵金属的方法，更具体地说，涉及通过使用压力浸出法将废反硝化催化剂中所含的贵金属浸出的方法， 包括以下步骤：通过将废反硝化催化剂与钠盐溶液混合形成混合物; 并通过将混合物进料到密封的加压反应器中来浸出混合物中的钒和钨，然后加热并搅拌混合物。