Direct process for the preparation of activated antiperspirant salts
AssigneeSomerville Technology Group, Inc.
InventorsDimitris E. Katsoulis, Walter J. Carmody
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Abstract
A method of producing activated metal salts useful in antiperspirant compositions is disclosed. The method produces the salt through an acid base reaction wherein an acid is reacted with a metal in basic form. Preferred metals include aluminum and zirconium. Activate aluminum-zirconium hydrohalide and activated aluminum-zirconium-amino acid salts can also be produced by the method of this invention.
Claims6
A method for preparing activated aluminum-zirconium-amino acid salts comprising:
- (I) reacting
- (A) zirconium carbonate and
- (B) aluminum hydroxide;
- with
- (C) an acid selected from HCl, HI, HBr, HF, HNO.sub.3, AlX.sub.3, ZrX.sub.4, ZrO(OH)X, and ZrOX.sub.2, wherein X is selected from Cl, Br and I and wherein there is between 2 and 10 times the stoichiometric amount of aluminum per amount of zirconium present in the reaction mixture;
- and
- (II) adding an amino acid to the reaction product of (I);
- and
- (III) recovering the reaction product of (II).
A method for preparing activated aluminum-zirconium-amino acid salts, comprising:
- (I) producing an activated aluminum salt by
- (i) reacting at a temperature of less than 100.degree. C.
- (A) aluminum hydroxide and
- (B) HCl
- (ii) reacting at a temperature of less than 100.degree. C.
- (A) zirconium carbonate with
- (B) HCl
- (iii) adding an amino acid to the activated zirconium salt produced in (ii);
- (iv) combining the activated aluminum salt (i) and the activated zirconium/amino acid salt (iii) to react same wherein there is between 2 and 10 times the stoichiometric amount of aluminum per amount of zirconium present in the reaction mixture;
- and
- (v) recovering from solution the activated aluminum-zirconium salt of (iv).
A method for preparing activated aluminum-zirconium-amino acid salts, comprising:
- (I) producing an activated aluminum salt by
- (i) reacting at a temperature of less than 100.degree. C.
- (A) zirconium hydroxide and
- (B) HCl
- (ii) reacting at a temperature of less than 100.degree. C.
- (A) zirconium carbonate with
- (B) HCl
- (iii) adding an amino acid to the activated aluminum salt produced in (i);
- (iv) combining the activated aluminum/amino acid salt (iii) and the activated zirconium acid salt (ii) to react same wherein there is between 2 and 10 times the stoichiometric amount of aluminum per amount of zirconium present in the reaction mixture;
- and
- (v) recovering from solution the activated aluminum-zirconium salt of (iv).
Dependencies are inferred from the claim text.