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.
Claims38
A method of manufacturing a solid block detergent composition, which method comprises:
- (i) combining:
- (a) about 20 to 80 wt % of an alkali metal carbonate;
- (b) an effective amount of an organic phosphonate hardness sequestering agent;
- and
- (c) about 0.01 to less than 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 hydrated alkali metal carbonate and organic phosphonate for solidification;
- wherein the solid block is substantially free of a second source of alkalinity.
A solid block warewashing detergent composition comprising:
- (a) about 20 to 65 wt % of Na2CO3;
- and
- (b) an effective sequestering amount of an organic phosphonate hardness sequestering agent;
- wherein the block comprises non-hydrated sodium carbonate and a binding agent comprising hydrated sodium carbonate and organic phosphonate, 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, a solid block, and an extruded solid block, the detergent consisting essentially of:
- (a) about 20 to 80 wt % of a Na2CO3;
- and
- (b) an effective amount of a sequestrant comprising an organic phosphonate and a condensed phosphate
- wherein the detergent is substantially free of a second source of alkalinity and the block 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.
Dependencies are inferred from the claim text.