Chematic 570

Developing A New Detergent Without a Chlorine Dependency.

Develop a new detergent without a chlorine dependency.  Existing Chematic detergents high chlorine levels combined with high temperature application.

What Was Evaluated:

Residue 'A' and Residue 'B'

              Protein-based blood fractionation residue

• Detergent Concentration
• Use of Hydroxide in cleaning
• Use of Bleach in cleaning
• Air/liquid interface
• Existing Chematic detergents

Criteria For A Passing Result

• Close visual examination with 50w halogen bulb
• Produce a "water break" free surface
• "Water Break Free" is recognized by ASTM F-22

*Actual residue names withheld for confidentiality reasons

• Determine if air/liquid interface simulation makes removal more difficult
• Run schedules at 40-45 C

Soiling Method

• Coupon was dipped in Residue A and baked at 60 C
• The coupon was re-dipped 7 times throughout the 4 hour bake time

• Passing results are achievable with longer process steps
• A 5 minute pre-rinse and a 15 minute detergent step gave consistent passing results without bleach
• Bleach did not remove Residue 'A' quicker
• Heavier amount of Residue 'A' still dissolved in the solutions

Evaluated formulations to reduce chlorine

• Ran various chlorine amounts in the detergent formulations
  • Chlorine amount in the detergent solution during cleaning ranged from 75-460ppm

Only the highest amounts of chlorine gave consistent passing results at 40-45 C

Evaluated formulations to eliminate chlorine

• Ran various hydroxide amounts in the detergent formulations
  • The formulations with the lowest amounts of hydroxide performed the best
• Ran Hi/Lo matrix of detergent concentration used in cleaning
  • 1% and 3% detergent giving different levels of hydroxide were evaluated

Lower hydroxide gave better results

This exercise showed that hydroxide level is a critical parameter

• Milk alkaline
• No chlorine
• Same cleaning effectiveness as previous detergents

• 1% Chematic 570 detergent concentration

• 2% Chematic 570 detergent concentration
  • Bleach did not reduce time required time to remove residue
  • Less detergent and a lower temperature can be used with bleach