Alumina

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B - Operations, Transporting

02

C

241/136, 23/249,

B02C 23/18 (2006.01) A61Q 11/00 (2006.01) B02C 23/06 (2006.01) C01F 7/02 (2006.01)

Patent

CA 1088040

ABSTRACT OF THE DISCLOSURE The specification describes a method of producing ground alpha alumina trihydrate such that it is suitable for incorporation in a toothpaste. The method includes the steps of grinding the substance to a mean particle diameter of less than 25 microns in the presence of a sufficient quantity of a potable organic acid or acid reacting salt to convert all free caustic soda on the surface of the particle to a sodium salt. Such a method reduces the possibility of the combined particles and toothpaste corroding the aluminum tubes used to package the product.

244448

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