Patent ID: 9403688
Filing Date: 2016-08-02
CPC Classification: C01B,C01P

Claim Text:
1. A method of producing biogenic silica nanoparticles comprising: separating seed hulls from a plant pretreating the separated seed hulls of the plant with an acid to form acid-treated seed hulls; heating the acid-treated seed hulls at a temperature greater than 100° C. for about 2 hours under pressurized conditions; washing the acid-treated seed hulls with water to remove the acid from the seed hulls; drying the seed hulls after removing the acid; and calcining the dried seed hulls at a temperature ranging from about 500° C. to about 700° C. for at least one hour in a furnace to produce biogenic silica nanoparticles, wherein the plant is selected from the group consisting of the biogenic silica nanoparticles are between about 10 nm and about 100 nm in size.