Abstract: The kinetics of evaporating concentration process for red beet extract liquid was investigated in this paper.The results indicated that loss rate of beet red pigment was in apparent secondary order reaction while the effect of temperature of temperature followed the Arrhenius equation .The kinetics model of evaporating concentration deterioration rate of beet red pigment correlating with solution temperature.relative density and concentration was established.The measured value of beet red pigment absorbency in the evaporating concentration process of the new type vertical dimpled plate falling film evaporator agreed essentially with the predicted value of theor etic model.It is shown that kinetics model is rafional and result accurate in predicting the degree of loss of beet red pigment in industrial evaporator concentration process.It could be edasan industrial production guide.

Key words: Beet red pigment Evaporating concentration process. Kinetics mode