Patent ID: 8513159

Claim:
A process of manufacturing powdered coffee carbons from spent coffee grounds comprising: (A) washing spent coffee grounds with fresh water, dehydrating same, and conveying same to a pre-carbonation oven for drying and pre-carbonization; (B) removing the pre-carbonized spent coffee grounds from the pre-carbonization oven, soaking same in a solution mixed with a predetermined quantity of sodium carbonate (Na 2 CO 3 ) for a predetermined period of time for grease removal, and washing the grease-free spent coffee grounds with fresh water; (C) pouring the pre-carbonized spent coffee grounds into a post-carbonization oven and heating the pre-carbonized spent coffee grounds to a range of 600 to 650° C. to carbonize the pre-carbonized spent coffee grounds, wherein carbonized spent coffee grounds have a porous structure; (D) activating the carbonized spent coffee grounds by supplying saturated steam of 850 to 950° C. to the carbonized spent coffee carbons; and (E) wet grinding the activated spent coffee carbons until powdered coffee carbons having a size between 0.1 and 20 μm are obtained.