Stable solid block detergent composition
AssigneeEcolab Inc.
InventorsSteven E. Lentsch, Keith E. Olson, G. Jason Wei
Life of this patent
Estimating the term…
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.
Claims35
A method of manufacturing a solid detergent composition, which method comprises:
- (i) combining:
- (a) about 20 to 80 wt % of an alkali metal carbonate;
- (b) an effective amount of a solidifying and hardness sequestering agent comprising 1 wt % to 30 wt % of an organic phosphonate;
- and
- (c) about 0.01 to 1.3 mole of water per mole of carbonate to form a blended mass;
- and
- (ii) forming the blended mass into a solid comprising non-hydrated alkali metal carbonate and a binding agent comprising a mono-hydrated alkali metal carbonate and organic phosphonate for solidification, wherein the mol ratio of alkali metal carbonate to organic phosphonate in the binding agent is in range of about 3:1 to about 7:1;
- wherein the solid is substantially free of a source of alkalinity other than an alkali metal carbonate.
A solid block warewashing detergent composition comprising;
- (a) about 20 to 65 wt % of Na2CO3;
- (b) an effective sequestering amount of a hardness sequestering agent comprising 1 wt % to 30 wt % of an organic phosphonate;
- and
- (c) about 0.01 to 1.3 mole of water per mole of sodium carbonate;
- wherein the block comprises non-hydrated sodium carbonate and a binding agent comprising mono-hydrated sodium carbonate and organic phosphonate, wherein the mol ratio of alkali metal carbonate to organic phosphonate in the binding agent is in range of about 3:1 to about 7:1, and wherein the block is substantially free of a second source of alkalinity.
A solid detergent comprising a product format selected from the group consisting of a pellet and a solid block, the solid detergent comprising:
- (a) about 20 to 80 wt % of a Na2CO3;
- (b) an effective amount of a sequestrant comprising 3 wt % to 30 wt % of an organic phosphonate;
- and
- (c) an effective amount of a chelating/sequestering agent including a condensed phosphate;
- wherein the detergent is substantially free of a source of alkalinity other than Na2CO3 and the detergent comprises about 0.9 to 1.3 moles of water per each mole of carbonate, and a binding agent comprising an organic phosphonate and sodium carbonate monohydrate, wherein the mol ratio of sodium carbonate to organic phosphonate in the binding agent is in range of about 3:1 to about 7:1.
Dependencies are inferred from the claim text.