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公开(公告)号：US20240294401A1
公开(公告)日：2024-09-05
申请号：US18648761
申请日：2024-04-29
发明人： Takahiro TAIRA , Tadao Hayashi , Chiaki Okui , Ryou Hatayama , Michinobu Koizumi , Taketo Kato , Yuuji Tanaka , Hirotoshi Yoshida
IPC分类号： C02F1/28 , B01J20/20 , B01J20/28 , B01J41/04 , B01J41/12 , C02F1/42 , C02F101/36 , C02F103/38 , C08F14/26
CPC分类号： C02F1/283 , B01J20/20 , B01J20/28064 , B01J20/2808 , B01J20/28083 , B01J20/28085 , B01J41/04 , B01J41/12 , C02F1/42 , C08F14/26 , C02F2001/422 , C02F2101/36 , C02F2103/38
摘要： A method for removing a fluorine-containing compound from discharge water, which includes bringing discharge water containing two or more fluorine-containing compounds represented by the following general formula (1) or (2) into contact with an adsorbent so as to adsorb the two or more fluorine-containing compounds:
(H—(CF2)m—COO)pM1 General Formula (1):
wherein m is 3 to 19, M1 is H, a metal atom, NRb4, where Rb is the same or different and is H or an organic group having 1 to 10 carbon atoms, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and p is 1 or 2;
(H—(CF2)n—SO3)qM2 General Formula (2):
wherein n is 4 to 20; M2 is H, a metal atom, NRb4, where Rb is the same as above, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and q is 1 or 2.-
公开(公告)号：US12030790B2
公开(公告)日：2024-07-09
申请号：US17280972
申请日：2019-10-03
发明人： Takahiro Taira , Tadao Hayashi , Chiaki Okui , Ryou Hatayama , Michinobu Koizumi , Taketo Kato , Yuuji Tanaka , Hirotoshi Yoshida
IPC分类号： B01J41/04 , B01J20/20 , B01J20/28 , B01J41/12 , C02F1/28 , C02F1/42 , C02F101/36 , C02F103/38 , C08F14/26
CPC分类号： C02F1/283 , B01J20/20 , B01J20/28064 , B01J20/2808 , B01J20/28083 , B01J20/28085 , B01J41/04 , B01J41/12 , C02F1/42 , C08F14/26 , C02F2001/422 , C02F2101/36 , C02F2103/38
摘要： A method for removing a fluorine-containing compound from discharge water, which includes bringing discharge water containing two or more fluorine-containing compounds represented by the following general formula (1) or (2) into contact with an adsorbent so as to adsorb the two or more fluorine-containing compounds:
(H—(CF2)m—COO)pM1 General Formula (1):
wherein m is 3 to 19, M1 is H, a metal atom, NRb4, where Rb is the same or different and is H or an organic group having 1 to 10 carbon atoms, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and p is 1 or 2;
(H—(CF2)n—SO3)qM2 General Formula (2):
wherein n is 4 to 20; M2 is H, a metal atom, NRb4, where Rb is the same as above, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and q is 1 or 2.-
公开(公告)号：US11851519B2
公开(公告)日：2023-12-26
申请号：US16637601
申请日：2018-08-10
发明人： Takahiro Taira , Kazuhiro Mishima , Chiaki Okui , Tadao Hayashi , Hirotoshi Yoshida , Yuuji Tanaka , Masayoshi Miyamoto , Taku Yamanaka , Taketo Kato
摘要： A method for producing an aqueous dispersion of purified polytetrafluoroethylene, the method including: removing or reducing a compound represented by Formula (1) or (2) below from an aqueous dispersion of polytetrafluoroethylene obtained using a hydrocarbon surfactant:
(H—(CF2)m—COO)pM1; or Formula (1):
(H—(CF2)n—SO3)qM2. Formula (2):
Also disclosed is a composition containing polytetrafluoroethylene substantially free from a compound represented by Formula (3) below and a molded body including the composition:
(H—(CF2)8—SO3)qM2. Formula (3):
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