Machine dishwashing process
AssigneeDiversey Lever, Inc.
InventorsHans Wilhelm Masshoff, Udo Fritz Walter Praeckel
Life of this patent
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Abstract
A machine dishwashing process for cleaning soiled crockery is provided. The process comprises: (1) optionally prewashing the crockery in a prewash zone; (2) washing the crockery in a wash zone with washing liquor; (3) spraying the crockery from the wash zone with a spraying solution; and (4) rinsing the crockery in a clear washing zone. The washing liquor includes used spraying solution from step (3). The spraying solution has an alkali content of at least 0.8 % by weight. An additive which is substantially free of alkali is supplied to the washing liquor to give a concentration in the washing liquor in the presence of the used spraying solution of at least 0.004 % by weight of complexing agent(s) and/or sequestering agent(s).
Claims32
A machine dishwashing process for cleaning soiled crockery, which comprises:
- (1) washing the crockery in a wash zone with washing liquor;
- (2) spraying the crockery from the wash zone with washing liquor;
- (3) rinsing the crockery in a clear washing zone;
- wherein the washing liquor includes used spraying solution from step (2), the spraying solution has an alkali content of at least 0.8% by weight, and an additive which is substantially free of alkali is supplied to the washing liquor to give a concentration in the washing liquor in the presence of the used spraying solution of at least 0.004% by weight of complexing agent(s) and sequestering agent(s).
A machine dishwashing process for cleaning soiled crockery, which comprises:
- (1) washing the crockery in a wash zone with washing liquor;
- (2) Spraying the crockery from the wash zone with a spraying solution;
- and
- (3) rinsing the crockery in a clear washing zone;
- wherein the washing liquor includes used spraying solution from step (2) wherein the spraying solution has an alkali content of at least 0.8% by weight and is substantially free of complexing agents and sequestering agents, and wherein an additive which is substantially free of alkali is supplied to the washing liquor to give a concentration in the washing liquor in the presence of the used spraying solution of at least 0.004% by weight of complexing agent(s) and sequestering agent(s).
A machine dishwashing process for cleaning soiled crockery, which comprises:
- (1) prewashing the crockery in a prewash zone;
- (2) washing the crockery in a wash zone with washing liquor;
- (3) spraying the crockery from the wash zone with a spraying solution;
- and
- (4) Rinsing the crockery in a clear washing zone;
- wherein the washing liquor includes used spraying solution from step (3), the spraying solution has an alkali content of at least 0.8% by weight, and an additive which comprises at least 50% by weight of a complexing agent and sequestering agent and less than 5% by weight of alkali is supplied to the washing liquor to give a concentration in the washing liquor in the presence of the used spraying solution of at least 0.004% by weight of complexing agent(s) and sequestering agent(s).
A machine dishwashing process for cleaning soiled crockery, which comprises:
- (1) prewashing the crockery in a prewash zone;
- (2) washing the crockery in a wash zone with washing liquor;
- (3) spraying the crockery from the wash zone with a spraying solution;
- and
- (4) Rinsing the crockery in a clear washing zone;
- wherein the washing liquor includes used spraying solution from step (3), wherein the spraying solution has an alkali content of at least 0.8% by weight and is substantially free of complexing agents and sequestering agents, and wherein an additive which comprises at least 50% by weight of a complexing agent and sequestering agent and less than 5% by weight of alkali is supplied to the washing liquor to give a concentration in the washing liquor in the presence of the used spraying solution of at least 0.004% by weight of complexing agent(s) and sequestering agent(s).
Dependencies are inferred from the claim text.