Method for manufacturing single-walled carbon nanotubes
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United States of America Patent
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Nov 1, 2011
Grant Date -
May 8, 2008
app pub date -
Dec 12, 2005
filing date -
Dec 13, 2004
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Abstract
The objective of the present invention is to provide a process of producing single-walled carbon nanotubes, capable of producing single-walled carbon nanotubes with high purity. A process of producing single-walled carbon nanotubes according to the present invention includes feeding a feedstock including a hydrocarbon source, a metallocene, and a sulfur compound in a state of mist to a feeding zone where hydrogen gas flows at a linear velocity of 1-50 m/second wherein the amount of the hydrocarbon source is 0.01-0.2% by mass and the amount of the metallocene is 0.001-0.2% by mass based on the total amount of the hydrogen gas and the feedstock, and the amount by mass of the sulfur compound is ⅛-4 times as much as that of the metallocene; and making the hydrogen gas and the fed feedstock flow through a reaction zone with a temperature of 800-1000° C.
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