Method of removing silica or silicates from solids resulting from the strong acid hydrolysis of cellulosic and hemicellulosic materials

摘要

A method of removing silica or silicates from solids results from the acid hydrolysis of materials containing cellulose and hemicellulose is disclosed. The method includes the steps of treating the solids with a metal hydroxide solution to produce an extract, reducing the pH of the extract to produce silicic acid, and removing the silicic acid from the extract.