The name is absent

Chapter 5

mixture. But if it is greater than 80%, titrator shows system error “check electrode".
In titer calibration, titer is 5.45 mg∕ml using mixture with toluene volume fraction
75%; while titer is 11.88 mg∕ml using mixture with toluene volume fraction 80%.

The titer value is 5.45 mg∕ml using pure methanol. Using mixture with toluene
volume fraction 75% as solvent can get the same titer as using pure methanol; but
using mixture with toluene volume fraction 80% can’t get the same titer. This
indicates toluene-methanol mixture with toluene volume fraction 75% is the
appropriate solvent for the titration of diluted bitumen.

Table 5.3 Solubility test and titer calibration using toluene-methanol mixture

5.7.3.2. K-F titration calibration of water content in diluted bitumen

Table 5.4 shows water content in diluted bitumen (after centrifugation, dilution
ratio 0.7) with different water amount via K-F titration using toluene-methanol
mixture with toluene volume fraction 75%. Residual water content in diluted
bitumen after centrifugation is 0.26 w.% measured by K-F titration. The total water
content in diluted bitumen is the combination of added water amount plus residual
water content in diluted bitumen after centrifugation.

170

<<   183   184   185   186   187   188   189   >>

More intriguing information