Personal protective equipment free delimer compositions o
AssigneeEcolab USA Inc.
InventorSeth Louis Marquard
Life of this patent
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Abstract
General purpose liquid deliming compositions are disclosed. The compositions include acids, surfactants, and pH modifiers and are adjusted to a pH of 2 to 7. The composition may be used without personal protective wear or transportation restriction and demonstrate similar lime removal to other traditional lime removal compositions which are extremely low in pH and require protective gear by the user. The compositions also do not require the use of chelants, or builders for effective cleaning. Methods of using the deliming compositions are also disclosed.
Claims17
A liquid deliming composition comprising:
- from 25 wt. % to about 35 wt. % of citric acid;
- from about 0.1 wt % to about 20 wt. % of surfactant;
- a pH modifier in an amount so that the amount of free citric acid is less than 10%, wherein said pH modifier is sodium citrate dihydrate;
- a preservative;
- and
- from about 35 wt. % to about 65 wt. % of water;
- wherein said composition is free of alkali metal hydroxides and alkanolamines.
A method of removing scale deposits from a dish machine comprising:
- applying a liquid deliming composition comprising:
- from 25 wt. % to about 35 wt. % of citric acid;
- from about 0.1 wt % to about 20 wt. % of surfactant;
- a pH modifier in an amount so that the amount of free citric acid is less than 10%, wherein said pH modifier is sodium citrate dihydrate;
- a preservative;
- and
- from about 35 wt. % to about 65 wt. % of water to said dish machine;
- and thereafter rinsing said dish machine, without the need for personal protective equipment,
- wherein said composition is free of alkali metal hydroxides and alkanolamines.
A method of cleaning a metal surface to remove hard water deposits and/or lime comprising:
- providing a liquid composition, comprising from 25 wt. % to about 35 Wt. % of citric acid;
- from about 0.1 wt % to about 20 wt. % of surfactant;
- a pH modifier in an amount so that the amount of free citric acid is less than 10%, wherein said pH modifier is sodium citrate dihydrate;
- a preservative;
- and
- from about 35 wt. % to about 65 wt. % of water;
- wherein said composition is free of alkali metal hydroxides and alkanolamines and further wherein the method does not require the use of personal protective equipment.
Dependencies are inferred from the claim text.