Colloidal hydroxide aqueous suspension of at least one transition element serving to reduce chrome in cement
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United States of America Patent
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Oct 13, 2009
Grant Date -
Sep 28, 2006
app pub date -
Aug 6, 2004
filing date -
Aug 8, 2003
priority date (Note) -
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Abstract
(−0.12 V) having a pH between 2 and 11, limits excluded, for reducing the content of chrome VI of cement to a value no greater than 2 ppm. The suspension is characterized in that it contains 0.5 to 80% by wt. of dry material of hydroxide of at least one transition element with regard to the quantity of water and in that it is stabilized by a hydrosoluble stabilizer. This suspension makes it possible to reduce the content of chrome VI of cements to a value no greater than 2 ppm.
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