A METHOD FOR MANUFACTURING OF SILICA SOLS

A METHOD FOR MANUFACTURING OF SILICA SOLS

The invention relates to a method for production of high purity silica sols comprising the steps: (a) adding a phos-phonic acid-based complexing agent to the silicic acid-containing solution forming complexes with metal cations present in said solution; (b) forming in said silicic acid-containing so...

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Hauptverfasser: TOKARZ, BOZENA STANISLAWA, LARSSON, KENNETH OLOF, LINSTEN, MAGNUS OLOF
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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creator TOKARZ, BOZENA STANISLAWA
LARSSON, KENNETH OLOF
LINSTEN, MAGNUS OLOF
description The invention relates to a method for production of high purity silica sols comprising the steps: (a) adding a phos-phonic acid-based complexing agent to the silicic acid-containing solution forming complexes with metal cations present in said solution; (b) forming in said silicic acid-containing solution a precipitati on containing phosphonic acid-based complexing agent and metal cations; (c) removing the precipitation from the solution; and, (d) polymerising the silicic acid in the solution to obtain a silica sol. The invention also relates to silica sols containing at least one phosphonic acid-based complexing agent.
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subjects CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
title A METHOD FOR MANUFACTURING OF SILICA SOLS
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