05595717 is referenced by 5 patents and cites 17 patents.

A more efficient utilization of geothermal energy by allowing flashing of the produced water to a lower temperature. This is accomplished by causing additional quantities of silica to precipitate out of the geothermal water as particles rather than as scale on process equipment. These particles are tertiary aggregate amorphous silica of Type I, II or III, which have high surface areas, good oil absorption and high reflectivity. They are useful as additives and opacifiers for paper, paints, rubbers, and plastics; as thixotropic thickening agents; and as absorbents. The improved energy recovery is accomplished by utilizing the addition (including recycle) of previously produced particles of amorphous tertiary aggregate silica of a selected Type I, II or III, as a heterogeneous precipitation agent, alone or in combination with other more conventional precipitation agents.

Title
Controlled precipitation of amorphous silica from geothermal fluids or other aqueous media containing silicic acid
Application Number
495976
Publication Number
5595717
Application Date
March 24, 1993
Publication Date
January 21, 1997
Inventor
Nicholas Wiseman
Okene Falls
NZ
James H Johnston
Wellington
NZ
Ross T Harper
Wellington
NZ
Agent
Nikaido Marmelstein Murray & Oram
Assignee
Geochemistry Research
NZ
Tasman Pulp & Paper Co
NZ
IPC
C01B 33/18
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