US 11,987,499 B2
Entangled-type carbon nanotubes and method for preparing the same
Sung Jin Kim, Daejeon (KR); Dong Hyun Cho, Daejeon (KR); Jae Keun Yoon, Daejeon (KR); Tae Hyung Kim, Daejeon (KR); and Og Sin Kim, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Filed by LG CHEM, LTD., Seoul (KR)
Filed on Feb. 28, 2023, as Appl. No. 18/115,184.
Application 18/115,184 is a division of application No. 16/628,555, granted, now 11,618,679, previously published as PCT/KR2018/014738, filed on Nov. 27, 2018.
Claims priority of application No. 10-2017-0179768 (KR), filed on Dec. 26, 2017; and application No. 10-2018-0146925 (KR), filed on Nov. 26, 2018.
Prior Publication US 2023/0406706 A1, Dec. 21, 2023
Int. Cl. C01B 32/162 (2017.01); B01J 21/04 (2006.01); B01J 23/847 (2006.01); B01J 37/02 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)
CPC C01B 32/162 (2017.08) [B01J 21/04 (2013.01); B01J 23/8472 (2013.01); B01J 37/0219 (2013.01); B01J 37/04 (2013.01); B01J 37/088 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01B 2202/22 (2013.01); C01B 2202/36 (2013.01); C01P 2002/78 (2013.01); C01P 2004/03 (2013.01); C01P 2006/11 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for preparing entangled-type carbon nanotubes, comprising:
mixing an organic acid and a vanadium precursor in a molar ratio of 1:0.0463 to 1:0.0875 to prepare a mixture;
mixing the mixture and a cobalt precursor to prepare a catalyst precursor;
performing first heat treatment on aluminum hydroxide to prepare a support;
supporting the catalyst precursor on the support and performing second heat treatment on the resulting support to prepare a supported catalyst; and
reacting the supported catalyst with a carbon-based compound;
thereby forming the entangled-type carbon nanotubes, wherein the entangled-type carbon nanotubes are not in the form of a bundle or rope.