Silicate producing method
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United States of America Patent
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May 24, 2011
Grant Date -
Oct 16, 2008
app pub date -
Oct 11, 2006
filing date -
Oct 12, 2005
priority date (Note) -
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Abstract
The present invention relates to a process for the preparation of a silicate comprising at least silicon and oxygen, comprising (1) mixing of silicon dioxide and/or of a silicon dioxide precursor with an aqueous solution comprising at least one tetraalkylammonium compound comprising R.sub.1R.sub.2R.sub.3R.sub.4N.sup.+ and at least one base, wherein R.sub.1 and R.sub.2 are methyl and both R.sub.3 and R.sub.4 are n-propyl; (2) heating of the colloidal solution obtained according to (1) to a temperature in the range of from greater than the boiling point of the colloidal solution under the chosen pressure to 180.degree. C. at atmospheric pressure to give a suspension comprising at least one silicate, wherein the silicate comprising at least silicon and oxygen is added as a crystallization auxiliary in (1).
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