公开(公告)号：US12023648B2

公开(公告)日：2024-07-02

申请号：US17282903

申请日：2019-10-11

申请人： NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

发明人： Akira Takahashi ,  Tohru Nakamura ,  Tohru Kawamoto ,  Kimitaka Minami

IPC分类号： B01J20/34 ,  C01C1/26 ,  C01C1/28

CPC分类号： B01J20/3433 ,  B01J20/3458 ,  C01C1/26 ,  C01C1/28

摘要： An ammonia chemical species desorption process desorbs ammonia chemical species adsorbed onto a Prussian blue derivative more simply at lower cost under milder conditions as compared with using an aqueous solution of a salt or strong acid, and only water. This ammonia chemical species desorption process includes an ammonia chemical desorption step of bringing carbon dioxide and water into contact with a Prussian blue derivative represented by the following general formula (1), thereby desorbing an ammonia chemical species.

AxM[M′(CN)6]y·zH2O  (1)

where x is 0 to 3, y is 0.1 to 1.5, z is 0 to 6, A is at least one cation of hydrogen, ammonium, an alkaline metal, and an alkaline earth metal, and M and M′ are each independently at least one cation of at least one of atoms having atomic numbers 3 to 83 except for ammonium, an alkali metal, and an alkaline earth metal.