- During the reaction of phosphate ore and sulphuric acid, silicon
tetrafluoride (SiF4) and HF are formed as byproducts. These gases
are usually scrubbed with water, forming fluorosilicic acid, H2SiF6
(FSA) as a waste stream.
- Fluorosilicic acid contain 90% reactive silica that can be
recovered and can be reused
- Current uses of Fluorosilicic acid are production of aluminium
fluoride, Metal Fluosilicates, Drinking water fluorination,
preservation of timber, disinfection of brewery equipment, Concrete
hardening and insecticides
- The first attempts to develop a process that directly reacts FSA
with sulphuric acid has been researched and many
patents have been filed The production of AHF from FSA has now been
commercialized and since
2008, plants are operating and the by product is Silica
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Basics
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Fluorosilicic Acid
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Silica Fact
sheet
Project Information
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Technology
Company
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Hydrofluoric
acid Plant Supplier
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Technology Consultant
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Wet scrubbers
Process
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Production of
hydrofluoric acid from fluorosilicic acid
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Production of
Anhydrous hydrofluoric acid from fluorosilicic acid
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Phosphoric Acid
Plant Cooling Water Treatment Process
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Phosphoric
Acid Cooling Tower
process water.
Applications
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Utilization of
By-Product Waste Silica in Concrete–Based Materials
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Water fluoridation
and wood preservation.
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Patents
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Process for the production of high purity
silica from waste by-product silica and hydrogen fluoride
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Process of producing hydrofluoric acid
from fluorosilicic acid
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Process of producing hydrofluoric
acid from fluorosilicic acid
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Process of producing Hydrogen Fluorine from
Fluosilicic Acid
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Process of recovering Hydrogen Fluoric acid
from aqueous Fluosilicic Acid
Market Scenario
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FSA - Manufacturing
Company
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Fluorosilicic acid Industry - USA
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Industry in China
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Ammonium Phosphate
Fertilizer Project proposal in India
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Environmental,
Health and Safety Guidelines for Phosphate Fertilizer Manufacturing
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