The evaluation of final molasses exhaustion mainly depends on the solubility of sucrose in impure solutions. The solubility is influenced by temperature, non- sugars concentration and non-sugars composition.
Two methods are employed for the determination of sucrose solubility : the experimental determination at elevated temperatures combined with a conversion to factory conditions using the relation found by Wiklund as well as the deduction from the non-sugars composition established by analysis. When applying the second method the partition of the non-sugars into two groups is sufficient : alkali salts and sum of the other nom-sugars (residual non-sugars).
These two methods of evaluation are compared. By the aid of our own experiments and of literature data it is shown that they are nearly equivalent with regard to the accuracy of the possible predictions.
An air thermostat and reaction vessels are described. They make possible an exact adjustment of the equilibrium in solubility experiments on final molasses and an exact separation of the syrup from the crystals without evaporation losses and temperature changes.
Proceedings: CITS 1971
pdf download: CITS1971-467-486.pdf