A process for extraction of pure silica from low grade coal and other low grade silicious mineral ores comprising the steps of: a)extract of metal inclusion present in the coal by addition of sodium hydroxide in a ratio varying from 1:2 to 1:4 at temperature range of 80-95°C b) extracting silica and alumina in the form of aluminosilicate by 60% in the reaction conditions as defined in step (a) (c) maximizing the extraction at atmospheric pressure and temperature of 95°C with reaction time of 2 hours. Fig. 1.
