Additive for reducing chromium (VI) to chromium (III) ions
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United States of America Patent
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Jan 29, 2013
Grant Date -
Oct 29, 2009
app pub date -
Jul 6, 2009
filing date -
Apr 18, 2005
priority date (Note) -
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Abstract
The invention relates to an additive for reducing Cr(VI) ions to Cr(III) ions, comprising a complex of tin(II) and a carboxylic acid or a salt thereof, and to the process for the preparation thereof. It also relates to a process for preparing a material having a low chromium(VI) content. Finally, it relates to the use of said additive for reducing chromium(VI) ions to chromium(III) ions.
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