The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2009
Filed:
Jan. 29, 2002
Fei Wei, Beijing, CN;
Yao Wang, Beijing, CN;
Guohua Luo, Beijing, CN;
Hao Yu, Department of Chemical Engineering Tsinghua University, CN;
Zhifei LI, Beijing, CN;
Weizhong Qian, Beijing, CN;
Zhanwen Wang, Beijing, CN;
Yong Jin, Beijing, CN;
Fei Wei, Beijing, CN;
Yao Wang, Beijing, CN;
Guohua Luo, Beijing, CN;
Hao Yu, Department of Chemical Engineering Tsinghua University, CN;
Zhifei Li, Beijing, CN;
Weizhong Qian, Beijing, CN;
Zhanwen Wang, Beijing, CN;
Yong Jin, Beijing, CN;
Tsinghua University, , CN;
Abstract
The present invention relates to a method for continuous production of carbon nanotubes in a nano-agglomerate fluidized bed, which comprises the following steps: loading transition metal compounds on a support, obtaining supported nanosized metal catalysts by reducing or dissociating, catalytically decomposing a carbon-source gas, and growing carbon nanotubes on the catalyst support by chemical vapor deposition of carbon atoms. The carbon nanotubes are 4˜100 nm in diameter and 0.5˜1000 μm in length. The carbon nanotube agglomerates, ranged between 1˜1000 μm, are smoothly fluidized under 0.005 to 2 m/s superficial gas velocity and 20˜800 kg/mbed density in the fluidized-bed reactor. The apparatus is simple and easy to operate, has a high reaction rate, and it can be used to produce carbon nanotubes with high degree of crystallization, high purity, and high yield.