Patent ID: 6248691
Filing Date: 2001-06-19
Classification: B01J,C01B,C04B,Y10T

Abstract:
A method of making activated carbon having at least about 50% of the total pore volume in the range of 20 to 500 angstroms, and not more than 25% of the total pore volume in the range of greater 500 angstroms, the method comprising:a) forming a mixture comprising a high carbon-yielding carbon precursor that when carbonized yields greater than about 40% carbon on a cured basis, and an additive selected from the group consisting of a low carbon-yielding carbon precursor, selected from the group consisting of glycerin, melamine formaldehyde and epoxy, and a combination of a catalyst metal and said low-carbon yielding carbon precursor wherein said catalyst metal is selected from the group consisting of iron and cobalt, and wherein the catalyst metal after the subsequent carbonization step is no greater than about 1 wt. % based on the carbon;b) curing the mixture;c) carbonizing the carbon precursors in the mixture;d) activating the carbon to produce activated carbon having at least about 50% of the total pore volume in the range of 20 to 500 angstroms, and not more than 25% of the total pore volume in the range of greater 500 angstroms; ande) removing said metal catalyst when said metal catalyst is used in combination with said low-carbon yielding precursor as an additive in step a).