Abstract The invention disclosed is directed to a highly alkaline detergent composition having unexpectedly high tolerance with respect to hard water. The composition includes from about 10 to about 50 parts of an alkaline inorganic detergent component, from about 5 to about 30 parts of a tetra-alkali metal pyrophosphate component, from about 5 to about 30 parts of an alkali metal nitrilo triacetate component, from 0 to about 5 parts of a watersoluble nitrite component, and from 0 to about 5 parts of a lowfoaming surfactant. The composition is low-foaming in use dilutions and highly effective for machine dishwashing with less spotting and greater clarity of articles cleaned therewith. Also disclosed is a process for washing articles for cooking and eating using dilute aqueous solutions of the composition.
The process of claim 1 wherein said composition consists essentially of: a. from about 10 to about 20 parts by weight of an alkali metal hydroxide, b. from about 10 to about 30 parts by weight of an alkali metal pyrophosphate, c. from about 5 to about 20 parts by weight of an alkali metal nitrilotriacetate, d. from 0 to about 0.5 parts by weight of a water-soluble nitrite, e. from about 20 to about 80 parts by weight of water.
Claim 2
Dependent Claim
74 words
The process of claim 1 wherein said composition consists essentially of: a. from about 10 to about 20 parts by weight of potassium hydroxide, b. from about 10 to about 30 parts by weight of tetrapotassium pyrophosphate, c. from about 5 to about 20 parts by weight of sodium nitrilo triacetate, d. from 0 to about 0.5 part by weight of sodium nitrite, e. from about 20 to about 80 parts by weight water.