Patent ID: 11873218
Assignee: PöRNER INGENIEURGESELLSCHAFT M.B.H.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method of producing a target sodium silicate solution from burned organic matter, comprising:
contacting ash from burned organic matter with clean water, wherein the ash contains amorphous silica, and wherein the clean water has a rinse temperature that is greater than 15° C.;
separating rinsed ash from contaminated rinse water, wherein the rinsed ash contains amorphous silica and water, and wherein the contaminated rinse water contains chlorides, sulfates, and other water soluble contaminants;
heating a reaction mixture, including the rinsed ash in the presence of sodium hydroxide, in a first reaction chamber to a reaction temperature greater than 90° C. and to a reaction pressure greater than or equal to 200,000 pascals (2 bars) to provide a pressure-cooked reaction mixture containing liquid sodium silicate with water soluble contaminants and undissolved solids;
separating the pressure-cooked reaction mixture to separate a preliminary sodium silicate solution from at least some of the undissolved solids, wherein the preliminary sodium silicate solution contains amorphous silica; and
separating the preliminary sodium silicate solution to remove at least some soluble organic molecules from the preliminary sodium silicate solution to provide the target sodium silicate solution containing amorphous silica.