Patent ID: 8287833
Filing Date: 2012-10-16
Classification: C01B

Abstract:
1. A sodium silicate solution produced by a method comprising the steps of: (i) manufacturing titanium dioxide, wherein the manufacturing comprises generating a waste product, the waste product comprising a precursor solid silica source; (ii) collecting the waste product; (iii) exfoliating and removing at least about 85% by weight titanium dioxide particles adhering to the surface of the precursor solid silica source of the collected waste product, to form cleaned silica; (iv) producing an intermediate sodium silicate solution by a hydrothermal fusion reaction of the cleaned silica with a caustic soda in an autoclave; (v) forming an amorphous silica source by transposing the SiO (vi) dissolving the amorphous silica provided in step (v) in the intermediate sodium silicate solution of step (iv) and raising the SiO wherein the high modulus sodium silicate solution is characterized by a presence of Ti and the following properties: a physical form of a clear and colorless liquid; a density of from 1.35 kg/L to 1.45 kg/L; a minimum content of 27.2% by weight of SiO 2 ; a maximum content of 9.0% by weight of Na 2 O; and a SiO 2 :Na 2 O molar ratio of from 3.0:1 to 3.8:1.