Colloidal hydroxide aqueous suspension of at least one...

Details Colloidal hydroxide aqueous suspension of at least one... Colloidal hydroxide aqueous suspension of at least one...

2004-08-06

2009-10-13

Marcantoni, Paul (Department: 1793)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C106S733000

Reexamination Certificate

active

07601328

ABSTRACT:
The invention relates to a hydroxide aqueous suspension of at least one selected transition element of which the potential oxidation reduction is less than that of the pair CrO72−/CrO42−(−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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