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US 5,593,339 AGranted
Slurry cleaning process
AssigneeChurch & Dwight Co., Inc.
InventorsBenny S. Yam, Robert C. Jorgensen, William E. Spears, Jr.
Life of this patent
Estimating the term…
Abstract
A method of cleaning a solid surface which is particularly effective for a surface having a complicated structure including slots and holes comprises immersing the solid surface in a cleaning slurry comprising a cleaning liquid and abrasive particles which are soluble in the cleaning liquid, the cleaning liquid comprising a saturated solution so as to greatly reduce the dissolution of the abrasive particles in the cleaning liquid.
Claims27
A method of cleaning a solid surface comprising:
- bringing a cleaning slurry into contact with said solid surface to be cleaned by immersing said solid surface in a bath of said cleaning slurry, said cleaning slurry comprising an aqueous cleaning liquid and water soluble alkaline salt abrasive particles which are soluble in said aqueous cleaning liquid, said aqueous cleaning liquid comprising a saturated solution of said water soluble alkaline salt abrasive particles so as to substantially inhibit the dissolution of said water soluble alkaline salt abrasive particles in said aqueous cleaning liquid, causing an eddy flow in the aqueous cleaning liquid so that said water soluble alkaline salt abrasive particles scrub said solid surface and aid in the removal of contaminants therefrom, said water soluble alkaline salt abrasive particles comprising alkali metal carbonates, bicarbonates or mixtures thereof, said aqueous cleaning liquid further including adjuvants which are soluble or readily dispersable in said aqueous cleaning liquid and which aid in the removal of said contaminants, said adjuvants including at least one surfactant.
A method of cleaning a solid surface comprising:
- bringing a cleaning slurry into contact with said solid surface to be cleaned, said cleaning slurry comprising a cleaning liquid and abrasive particles which are soluble in said cleaning liquid, said cleaning liquid comprising a saturated solution of said abrasive particles so as to substantially inhibit the dissolution of said abrasive particles in said cleaning liquid, causing an eddy flow in the cleaning liquid so that said abrasive particles scrub said solid surface and aid in the removal of contaminants therefrom, said cleaning liquid further includes adjuvants which are soluble or readily dispersable in said cleaning liquid and which aid in the removal of said contaminants, said adjuvants include a recrystallization agent.
Dependencies are inferred from the claim text.