US 8,048,821 B2 · Catalyst composition for the synthesis of thin multi-walled carbon nanotube and its manufacturing method

Abstract

The present invention relates to a catalyst composition for the synthesis of thin multi-walled carbon nanotube (MWCNT) and a method for manufacturing a catalyst composition. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Al, ii) inactive support of Mg and iii) optional co-catalyst at least one selected from Co, Ni, Cr, Mn, Mo, W, V, Sn, or Cu. Further, the present invention affords thin multi-walled carbon nanotube having 5˜20 nm of diameter and 100˜10,000 of aspect ratio in a high yield.

Claims4

Dependent claims

A catalyst composition for producing carbon nanotube represented by following formula

[Fea:Alb]x:My:Mgz
wherein
Fe represents catalytic metal of iron, its oxide;
Al represents catalytic metal of aluminum, its oxide;
Mg represents inactive support of magnesium, its oxide;
M represents at least one transition metal selected from Co, Ni, Cr, Mn, Mo, W, V, Sn, or Cu, its oxide;
x, y, and z represent molar fraction of [the sum of Fe and Al], M, and Mg,
x+y+z=10, 2.0≦x≦8.0, 0.0≦y≦2.5, 0.5≦z≦8.0
a and b represent molar fraction of Fe and Al,
a+b=10, 2.0≦a≦5.5, 4.5≦b≦8.0.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/472,925Filed 27 May 2009

Priority

KR 10-2009-001171213 Feb 2009

Published

US 2010/0207053 A119 Aug 2010

Granted

1 Nov 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification22 codes

B01J 21/185
Carbon: carbon nanotubes
B01J 23/002
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00: mixed oxides other than spinels, e.g. perovskite
B01J 23/78
Combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36: with alkali- or alkaline earth metals
B01J 23/862
Chromium: iron and chromium

Catalyst composition for the synthesis of thin multi-walled carbon nanotube and its manufacturing method

Life of this patent

Catalyst composition for the synthesis of thin multi-walled carbon nanotube and its manufacturing method

Life of this patent

Abstract

Claims4