Patent ID: 7374653

Claim:
A method of producing oxidized graphite having a low foaming temperature in a temperature range from 150° C. to 260° C. for manufacturing foamed graphite, comprising carrying out the stages of: (a) preparing a mixture based on graphite particles and at least one aqueous solution of a strong acid; (b) activating the surface of said graphite particles to form oxygen containing functional groups on the surface of the graphite particles; (c) treating the graphite particles to obtain a graphite intercalation compound; (d) washing said intercalation compound with water; and (e) drying said intercalation compound; wherein stages (b) and (c) are carried out by electrochemical anodic treatment at a total quantity of electricity of at least 200 mA·hour/g of graphite, stage (b) is carried out at up to 20% of a total quantity of electricity with a current or potential at least 1.1 times higher than that of stage (c).