Jesse W Conner

US Patent:

6524543, Feb 25, 2003

Filed:

Aug 25, 1998

Appl. No.:

09/139236

Inventors:

Roy S. Rieber - Houston TX 77042
William A. Mallow - Helotes TX 78023
Jesse R. Conner - Darien IL 60559

International Classification:

C01B 3332

US Classification:

423332, 106600

Abstract:

Disclosed is a commercial grade of soluble silicate solutions, clear homogenous and water white essentially free of unreacted silica, made by dissolving in a closed container biogenic silica, preferably rice hull ash, in a strong alkali solution, preferably sodium hydroxide in the presence of an agent, such as an active carbonaceous material, which prevents discoloration of the soluble silicates by absorbing and/or reacting with polyvalent metals, organic materials, and the like, in the biogenic silica as it dissolves in and reacts with the alkali solution. The invention takes advantage of the residue of such active carbonaceous material on the biogenic silica, such as rice hulls, left by commercial energy burning thereof which effectively prevents discoloration. A solid residue results from the method which is an active carbonaceous material including concentrated manganese from the biogenic silica, both of which are valuable commercial products.

US Patent:

58339400, Nov 10, 1998

Filed:

Feb 27, 1992

Appl. No.:

7/842915

Inventors:

Roy S. Reiber - Houston TX
William A. Mallow - Helotes TX
Jesse R. Conner - Darien IL

Assignee:

EnviroGuard, Inc. - Houston TX

International Classification:

C01B 3332

US Classification:

423334

Abstract:

Disclosed is a commercial grade of soluble silicate solutions, clear homogenous and water white essentially free of unreacted silica, made by dissolving in a closed container biogenetic silica, preferably rice hull ash, in a strong alkali solution, preferably sodium hydroxide in the presence of an agent, such as an active carbonaceous material, which prevents discoloration of the soluble silicates by absorbing and/or reacting with polyvalent metals, organic materials, and the like, in the biogenetic silica as it dissolves in and reacts with the alkali solution. The invention takes advantage of the residue of such active carbonaceous material on the biogenetic silica, such as rice hulls, left by commercial energy burning thereof which effectively prevents discoloration. A solid residue results from the method which is an active carbonaceous material including concentrated manganese from the biogenetic silica, both of which are valuable commercial products.