Caustic Temperature / Concentration Question for CIP systems

[lester26]

Over the past several years, I have read many articles stipulating that clean in place systems typically run 3 - 6% NaOH solutions with a target temperature of 160 - 180F (even higher Temps if special provisions exist). In most applications on my current equipment, I have found a 5-6% solution at 175 - 180F works best. Does anyone have a temperature versus concentration source (graph, article, etc.) that would best describe the optimum "general" conditions???

Industry would be ethanol and the exchangers would be primarily beer, stillage, light steep water & dextrose.

Thanks in advance,

LESTER

 

[lester26]

Any good resources/generalizations for caustic that could be used as a reference for the above?

 

[TD2K]

I don't have any information on this but you might want to talk to Dow Chemicals about it. They have a pretty good technical group when I've had to talk to them in the past.