Method of reclaiming formula components of antiperspirant compositions

Patent metadata

Field	Value
Publication number	US-10987285-B2
Application number	US-201415531966-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Dec 4, 2014
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

Methods for reclaiming formula components of an antiperspirant composition and recycling formula into its component parts for recycling into an antiperspirant composition.

First claim

What is claimed is:

1. A method comprising:
(1) melting a solid or semi-solid antiperspirant composition within a package;
(2) removing the molten antiperspirant composition from the package;
(3) settling the molten antiperspirant composition directly from steps (1) and (2) for a period of 6 to 72 hours so as to settle the molten composition into a liquid phase having an oil/wax phase, and a solid phase having an antiperspirant active;
(4) separating the solid phase from the oil/wax phase by washing the melted antiperspirant composition with water to form an aqueous phase in the liquid phase, wherein washing the melted antiperspirant composition distributes the antiperspirant active in the aqueous phase, and washing separates the solid phase from the oil/wax phase within 3 hours; and
(5) treating the liquid phase to reclaim one or more components thereof, which comprises removing the aqueous phase for reclaiming of the antiperspirant active; and saponifying the oil/wax phase.

2. The method of claim 1 , wherein the solid or semi-solid antiperspirant composition is disposed within the package and the package comprises a recyclable material, and the method further comprises:
removing the antiperspirant composition from the package; and
recycling the recyclable material of the package.

3. The method of claim 1 , wherein melting the solid or semi-solid antiperspirant composition comprises heating the composition at a temperature in a range of 70° C. to 100° C.

4. The method of claim 1 , wherein the liquid phase comprises a plant oil, an emollient, and a fatty alcohol.

5. The method of claim 1 , wherein the oil/wax phase comprises palm kernel oil, castor wax, behenyl alcohol, stearyl alcohol, and hydrogenated soybean oil.

6. The method of claim 1 , wherein the component reclaimed is a neat soap or a spent lye.

7. The method of claim 1 , wherein settling the antiperspirant composition into a liquid phase and solid phase occurs within a time period that is in the range of 6 hours to 36 hours.

8. A method comprising:
(1) melting a solid or semi-solid antiperspirant composition within a package;
(2) removing the molten antiperspirant composition from the package;
(3) settling the molten antiperspirant composition directly from steps (1) and (2) for a period of 6 to 72 hours so as to settle the molten composition into a liquid phase having an oil/wax phase, and a solid phase having an antiperspirant active;
(4) separating the oil/wax phase of a molten solid or semi-solid antiperspirant composition from a solid phase having an antiperspirant active, wherein separating the oil/wax phase from the solid phase comprises washing the antiperspirant composition with water to form a liquid phase comprising an oil/wax phase and an aqueous phase;
(5) saponifying the oil/wax phase to form a saponified soap mass;
(6) fitting the saponified soap mass to form a fitted soap mass; and
(7) separating a neat soap from the fitted soap mass.

9. The method of claim 8 , wherein the antiperspirant composition comprises an antiperspirant active, a plant oil, an emollient, and a fatty alcohol.

10. The method of claim 8 , wherein the oil/wax phase comprises palm kernel oil, castor wax, behenyl alcohol, stearyl alcohol, and hydrogenated soybean oil.

11. The method of claim 8 , wherein saponifying the oil/wax phase comprises:
heating the oil/wax phase; and
contacting the oil/wax phase with a caustic alkali solution.

12. The method of claim 11 , wherein the caustic alkali solution comprises a solution of sodium hydroxide and sodium chloride, wherein the caustic alkali solution comprises 0.1 to 3 percent by weight of sodium hydroxide and 10 to 21 percent by weight of sodium chloride.

13. The method of claim 11 , wherein saponifying the oil/wax phase further comprises continuous agitation of the oil/wax phase during contact with the caustic alkali solution.

14. The method of claim 8 , further comprising:
removing a spent lye component from the saponified soap mass.

15. The method of claim 8 , wherein the fitted soap mass further comprises a slurry soap.

16. The method of claim 8 , further comprising drying the neat soap.

17. The method of claim 8 , wherein the neat soap comprises an anhydrous soap, an alkali salt, an alkali hydroxide, glycerol, and water.

18. The method of claim 17 , wherein the neat soap comprises 60% to 72% by weight of the anhydrous soap, 0.5% to 1.5% by weight of sodium chloride, 0.01% to 0.5% by weight of sodium hydroxide, 0.5% to 3% by weight of glycerol, and water.

Assignees

• Colgate Palmolive Co

Inventors

• Misner Steven
• Molina Pablo
• Blume Richard
• Growe Jr Ronald
• Eckert Frederick
• Wisniewski Peter

Classifications

• A61K8/0216 Primary

  Solid or semisolid forms · CPC title

• A61Q15/00

  Anti-perspirants or body deodorants (deodorisation of air A61L9/00) · CPC title

• A61K8/0229 Primary

  Sticks · CPC title