Patent ID: 8277768
Filing Date: 2012-10-02
Classification: C01B,Y10T

Abstract:
1. A method of producing a silicon solids from a mixture comprising silicon and water, the method comprising: collecting said mixture, said mixture collected from at least one wafer abrasion process performed on a silicon surface having an impurity concentration≦1 ppb; extracting one portion of said water from said mixture using at least one dryer stage to form a dry cake, said dry cake comprising at least 99.99% silicon by weight excluding water and silica, wherein a concentration of water in said dry cake is between 0.05% and 1% by weight, wherein a concentration of silica in said dry cake is between 0.05% and 1% by weight, and wherein a concentration of other non-silicon species in said dry cake is less than or equal to 0.01% by weight.