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US 12,522,502 B2Granted
Bundle-type carbon nanotubes and method for preparing the same
AssigneeLG Chem, Ltd.
InventorsSung Jin Kim, Jae Keun Yoon, Dong Hyun Cho, Hyun Joon Kang, Byung Yul Choi, Duk Ki Kim, Hyun Woo Park, Hyo Sang You
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Abstract
The present invention relates to a bundle-type carbon nanotube which has a bulk density of 25 to 45 kg/m3, a ratio of the bulk density to a production yield of 1 to 3, and a ratio of a tap density to the bulk density of 1.3 to 2.0, and a method for preparing the same.
Claims3
A method for preparing a bundle-type carbon nanotube, comprising:
- preparing a mixture comprising an organic acid and a vanadium-based compound in a molar ratio of 1:(1 to 30);
- preparing a catalyst precursor comprising the mixture and a cobalt-based compound;
- performing first thermal treatment of aluminum hydroxide to prepare a support;
- supporting the catalyst precursor in the support and performing second thermal treatment under a pressure of 0.1 to 2 above atmospheric pressure bar to prepare a supported catalyst;
- and
- reacting the supported catalyst with a carbon-based compound.
3 more elements
Dependencies are inferred from the claim text.