THE CONCENTRATION OF THE SYRUP TO MASSECUITE. 



Actually in practice the purer the syrup the higher is the degree Brix 

 (i.e., the sugar boiler brings up the strike higher) so that so great a difference 

 in the purities of molasses from strikes of different purities will not be noticed. 

 It is, however, a matter of experience that high purities in the strike imply 

 high purities in the mother liquor or molasses. 



The equation (2) above gives the degree Brix to which a massecuite must 

 be boiled to give molasses of any desired purity when the solubility of sugar 

 in the water remaining in the massecuite is known. 



In the annexed table is calculated the degree Brix to which massecuites 

 of purity 46 to 95 must be boiled in order to give a mother liquor of 46 purity 

 when the solubility of sugar in the mother liquor is 1*8. 



Values of the expression 100 x 



s 



s-\-m msmp 

 s 1-8 and m '46, and of p -46 to '95. 



for values of 



Now, according to the equation, it is possible by boiling to a sufficient con- 

 centration to obtain in one process exhausted molasses; thus a syrup of 90 purity 

 if boiled to a concentration of 95 -4 8 Brix would, on the data on which the table 

 was constructed, give molasses of 46 purity ; now from actual experience it is 

 known that often four operations are necessary in general to obtain this end ; 

 there is no real disagreement between theory and practice but the causes of 

 this are : 



1 . It is impossible practically to boil any massecuite to so high a con- 

 centration as 95-48 ; a massecuite so highly concentrated would have no 



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