Patent ID: 6423288
Filing Date: 2002-07-23
Classification: B01J,B29K,B82Y,C04B,C08K,D01F,F16D,H01B,Y10T

Abstract:
In the process of producing carbon fibrils by decomposing a source of carbon at elevated temperatures in contact with a multivalent transition metal and recovering the fibrils formed thereby; the improvement, whereby increasing the yield of such fibrils, which comprises contacting said source of carbon at a temperature of about 500 to 1500Â° C. with a catalyst comprising at least one multivalent transition metal on an inorganic substrate having a size of up to about 400 microns, said metal being present on said substrate as a multiplicity of discontinuous catalytic sites which, at least during fibril formation, have a size of about 35 to 700Â° A which size is measured by measuring the size of transition metal particles recovered along with produced fibrils.