Patent ID: 6817366
Filing Date: 2004-11-16
Classification: B08B,B67D,Y10T

Abstract:
A method of preventing inadvertent consumption by a consumer of a caustic material used for cleaning the flow lines of a beverage dispensing system, comprising:diluting a concentrated caustic cleaning solution, said caustic cleaning solution comprising approximately 15% to approximately 30% potassium hydroxide and approximately 0.04% w/v to approximately 0.10% w/v monoazo dye; introducing the diluted caustic cleaning solution into the flow lines of the beverage dispensing system to clean the flow lines; circulating the diluted dyed caustic cleaning solution through the flow lines; discharging the diluted dyed caustic cleaning solution; introducing a substantially colorless flushing liquid into the flow lines to flush the flow lines and remove any residual dyed caustic cleaning solution from the flow lines along with discharged flushing liquid; and continuing to flush the system with the flushing liquid until the discharged flushing liquid is devoid of any dyed caustic cleaning solution, indicating that no residual dyed caustic cleaning solution remains in the lines to subsequently be dispensed with a potable liquid and inadvertently consumed by a consumer along with the subsequently dispensed potable liquid.