公开(公告)号：US10987650B2

公开(公告)日：2021-04-27

申请号：US15733236

申请日：2018-12-18

申请人： KURARAY CO., LTD.

发明人： Keita Takahashi ,  Takayuki Yoshikawa ,  Tetsuya Hanamoto ,  Hiroe Yoshinobu ,  Takayuki Yamada

IPC分类号： B01J20/20 ,  B01J20/28 ,  C02F1/28 ,  C02F101/12 ,  C02F101/32

摘要： One aspect of the present invention relates to an adsorption filter containing an activated carbon and a fibrous binder. The adsorption filter has a density of 0.400 g/ml or more, and a pore volume at a pore diameter of 1 to 20 μm is 0.60 ml/g or less as measured by mercury intrusion porosimetry.

公开(公告)号：US10023475B2

公开(公告)日：2018-07-17

申请号：US14435924

申请日：2013-10-17

申请人： Kuraray Co., Ltd.

发明人： Satoru Arita ,  Shizuo Ishimura ,  Tetsuya Hanamoto

IPC分类号： C02F1/28 ,  B01D39/20 ,  B01J20/20 ,  B01J20/28 ,  B01J20/30 ,  B01D24/00 ,  B01D24/20 ,  C02F101/12 ,  C02F101/36

摘要： A water-processing filter having a high dimensional accuracy and an improved filterability (such as a capability to remove turbidity components) is provided. The water-processing filter comprises (A) a hollow cylindrical filter which comprises (a1) a granular activated carbon having a median particle size of 30 to 80 μm and (a2) a fibrillated fibrous binder. The cylindrical filter (A) has an upstream outer surface having an arithmetical mean deviation of a waviness profile adjusted to not more than 30 μm and an arithmetical mean deviation of a primary profile adjusted to 35 to 45 μm. The cylindrical filter (A) may have a downstream inner surface having an arithmetical mean deviation of a waviness profile of not more than 30 μm and an arithmetical mean deviation of a primary profile of 35 to 45 μm. The cylindrical filter (A) may have a grounded outer surface. In a hollow space of the cylindrical filter (A), (B) a cylindrical filter comprising (b1) a granular activated carbon having a median particle size of 30 to 80 μm and (b2) a granular binder may be disposed.

公开(公告)号：US09782750B2

公开(公告)日：2017-10-10

申请号：US14410319

申请日：2013-06-21

申请人： Kuraray Co., Ltd. ,  TANAKA KIKINZOKU KOGYO K.K.

发明人： Tetsuya Hanamoto ,  Takayuki Yamada ,  Yoshichika Sabae

IPC分类号： C22B3/22 ,  C22B3/24 ,  C22B11/00 ,  B01J20/28 ,  C01B31/10 ,  C01B31/12 ,  C22B3/00 ,  C02F1/28 ,  B01J20/20 ,  C02F101/20 ,  C02F103/16

CPC分类号： B01J20/2808 ,  B01J20/20 ,  B01J20/2803 ,  B01J20/28061 ,  B01J20/28071 ,  B01J20/28073 ,  C01B32/336 ,  C01B32/342 ,  C02F1/283 ,  C02F2101/20 ,  C02F2103/16 ,  C22B3/22 ,  C22B3/24 ,  C22B11/04 ,  Y02P10/234

摘要： In an activated carbon for adsorbing a noble metal from an aqueous solution containing the noble metal, the difference (absolute value) between a zeta-potential in a 10 mmol/L aqueous solution of sodium tetraborate and a zeta-potential in a 0.01 mmol/L aqueous solution of sodium tetraborate is adjusted to not more than 18 mV and the pore volume of pores with a pore radius of not more than 1 nm is adjusted to 150 to 500 mm3/g. The activated carbon of the present invention may have a carbohydrate solution decolorizing performance of not less than 30%. The aqueous solution containing the noble metal may be a plating wastewater. According to the present invention, a noble metal can efficiently be adsorbed (or recovered) from a solution containing the noble metal.