PROCESS OF TREATING CARBON TO REDUCE THE ASH CONTENT THEREIN

摘要

PCT No. PCT/AU86/00044 Sec. 371 Date Dec. 10, 1986 Sec. 102(e) Date Dec. 10, 1986 PCT Filed Feb. 18, 1986 PCT Pub. No. WO86/04917 PCT Pub. Date Aug. 28, 1986.A process for treating carbon to reduce the ash content therein. The process involves treating the carbon with a fluorine acid solution which consists of an aqueous solution of hydrofluorosilicic acid and hydrogen fluoride, such that the available metal oxides are converted to metal fluorides and/or metal fluorosilicates and separating the treated carbon from the metal fluorides and/or metal fluorosilicates produced by the treatment.