Process for removing starch-containing contamination from dishes and surfactant concentrates suitable for this process
AssigneeChemische Fabrik Dr. Weigert GmbH & Co. KG
InventorOlaf Schreiber
Life of this patent
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Abstract
A process for removing especially starch-containing impurities from crockery in dishwashers makes it possible effectively to remove the impurities if a concentrated aqueous tenside solution is used which contains 0.08 to 2.0 % wt, N-C.sub.8 to C.sub.12 alkyl pyrrolidone, 0.005 to 0.125 Artson units of one or more proteases and/or 0.1 to 6 kilo-novo units or one or more amylases per liter of solution, buffer substances active in the pH range from 5 to 9 and conventional solvent agents and possibly conventional additives like foam suppressors, perfumes, colorants, thickening agents, preserving agents and hardness dispersants.
Claims36
A method for removing contamination from dishes in dishwashers comprising the steps of:
- a) providing a buffered surfactant solution comprising one or more N-alkylpyrrolidones at a concentration range of 0.98% to 2.0% by weight and one or more enzymes selected from the group consisting of proteases at a concentration of 0.005 to 0.1.25 Anson units and amylases at a concentration range of 0.1 to 6 kilo-Novo units;
- and
- b) exposing said dishes to said surfactant solution, under conditions where said contamination is removed.
A method for removing starch-containing contamination from dishes in dishwashers comprising the steps of:
- a) providing a buffered surfactant solution comprising one or more N-n-(C.sub.8 - to C.sub.12 -)-alkylpyrrolidones, one or more proteases and one or more amylases;
- b) exposing said dishes to said surfactant solution;
- c) mechanically cleaning said dishes in the presence of a detergent;
- and
- d) rinsing said dishes.
A method for removing starch-containing contamination from crockery in dishwashers comprising the steps of:
- a) providing a buffered surfactant solution comprising one or more N-n-(C.sub.8 - to C.sub.12 -)-alkylpyrrolidones, one or more buffers, one or more proteases, one or more amylases, and one or more additives selected from the group consisting of foam suppressants, fragrances, dyestuffs, thickeners, preservatives and hardness-dispersing agents;
- b) mechanically pre-cleaning said crockery;
- c) exposing said crockery to said surfactant solution for approximately 5-90 seconds at a temperature of approximately 40.degree.-60.degree. C.;
- d) mechanically cleaning said crockery in the presence of a detergent;
- and
- e) rinsing said crockery.
A buffered surfactant solution, comprising 0.08 to 2.0% by weight N-n-(C.sub.8 to C.sub.12)-alkylpyrrolidones, one or more proteases at a concentration range of 0.005 to 0.125 Artson units and one or more amylascs at a concentration range of 0.1 to 6 kilo-NOVO units.
Dependencies are inferred from the claim text.