Stable solid block detergent composition

• US 7,094,746 B2
• Filed: 12/10/2004
• Issued: 08/22/2006
• Est. Priority Date: 01/13/1997
• Status: Expired due to Term

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab, Inc.
• Inventors: Lentsch, Steven J., Olson, Keith E., Wei, G. Jason
• Primary Examiner(s): Douyon, Lorna M.
• Application Number:
  US11/009,315
• Publication Number:
  US 20050119149A1
• Time in Patent Office: 620 Days
• Field of Search: 510/224, 510/228, 510/231, 510/445, 510/446, 510/451, 510/469, 510/509, 510/510
• US Class Current: 510/445
• CPC Class Codes: C11D 17/0047 Detergents in the form of bars or tablets
• CPC Class Codes: C11D 17/0052 Cast detergent compositions
• CPC Class Codes: C11D 17/0065 Solid detergents containing builders C11D17/06 takes precedence
• CPC Class Codes: C11D 3/06 Phosphates, including polyphosphates
• CPC Class Codes: C11D 3/08 Silicates
• CPC Class Codes: C11D 3/10 Carbonates ; Bicarbonates
• CPC Class Codes: C11D 3/361 Phosphonates, phosphinates or phosphonites
• CPC Class Codes: C11D 3/364 containing nitrogen
• CPC Class Codes: C11D 7/12 Carbonates bicarbonates
• CPC Class Codes: C11D 7/36 containing phosphorus

Abstract

The dimensionally stable alkaline solid block warewashing detergent uses an E-form binder forming a solid comprising a sodium carbonate source of alkalinity, a sequestrant, a surfactant package and other optional material. The solid block is dimensionally stable and highly effective in removing soil from the surfaces of dishware in the institutional and industrial environment. The E-form hydrate comprises an organic phosphonate and a hydrated carbonate.

Claims

1. A detergent composition comprising:

(a) about 20 to 80 wt % of alkali metal carbonate;

(b) 1 to 30 wt % of an organic sequestrant;

(c) about 0.01 to 1.3 mole of water per mole of carbonate; and

wherein the composition comprises non-hydrated alkali metal carbonate and a binding agent comprising mono-hydrated alkali metal carbonate and organic sequestrant, and the mole ratio of alkali metal carbonate to organic sequestrant in the binding agent is in range of about 3;

1 to about 7;

1, and the composition is substantially free of a second source of alkalinity.

2. The composition of claim 1, wherein the organic sequestrant comprises organic phosphonate.

3. The composition of claim 2, wherein the organic phosphonate comprises 1-hydroxyethane-1,1-diphosphonic acid CH₃C(OH)[PO(OH)₂]₂;

aminotri(methylenephosphonic acid) N[CH₂PO(OH)₂]₃;

aminotri(methylenephosphonate), sodium salt ONa POCH₂N[CH₂PO(ONa)₂]₂;

OH 2-hydroxyethyliminobis(methylenephosphonic acid) HOCH₂CH₂N[CH₂PO(OH)₂]₂;

diethylenetriaminepenta(methylenephosphonic acid) (HO)₂POCH₂N[CH₂CH₂N[CH₂PO(OH)₂]₂]₂;

diethylenetriaminepenta(methylenephosphonate), sodium salt C₉H_(25-x)(N₃Na_xO₁₅P₅(x=7);

hexamethylenediamine(tetramethylenephosphonate), potassium salt C₁₀H_(28-x)N₂K_xO₁₂P₄(x=6);

or bis(hexamethylene)triamino(pentamethylenephosphonic acid).

4. The composition of claim 1 comprising about 3 to 20 wt % organic phosphonate and additionally comprises an inorganic condensed phosphate.

5. The composition of claim 1, wherein the composition comprises 1 to 45 wt % of an inorganic tripolyphosphate and 1 to 20 wt % of the organophosphonate sequestrant.

6. The composition of claim 1, wherein the organic sequestrant comprises aminocarboxylate.

7. The composition of claim 6, wherein the aminocarboxylate comprises N-hydroxyethyliminodiacetic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, N-hydroxyethyl-ethylenediaminetriacetic acid, or diethylenetriaminepentaacetic acid.

8. The composition of claim 1, wherein the binding agent comprises a mono-hydrated sodium carbonate and an organic sequestrant.

9. The composition of claim 1, wherein the binding agent has a decomposition onset temperature of greater than 120°

C.

10. The composition of claim 1, wherein the alkali metal carbonate is sodium carbonate, and composition comprises about 0.9 to 1.3 moles of water per mole of sodium carbonate.

11. The composition of claim 10, wherein the detergent composition comprises less than 1.25 moles of water per mole of sodium carbonate.

12. The composition of claim 1, wherein the alkali metal carbonate is sodium carbonate, and there are less than 1.25 moles of water per mole of sodium carbonate.

13. The composition of claim 1, wherein the mono-hydrated alkali metal carbonate comprises sodium carbonate and the composition further comprises (d) about 1.5 to 15 wt % of a surfactant comprising an anionic surfactant, a nonionic surfactant, or mixture thereof.

14. The composition of claim 1, comprising about 20 to 65 wt % of alkali metal carbonate.

15. The composition of claim 1, wherein the detergent composition is extruded to form a solid block.

16. The composition of claim 1, wherein the detergent composition is a solid.

17. The composition of claim 16, wherein the solid is provided in the form of a solid block.

18. The composition of claim 17, wherein the solid block has a mass greater than about 10 gms.

19. The composition of claim 16, wherein the solid is provided in the form of a pellet.