The name is absent

Chapter 5

Figure 5.16 shows bar diagrams of residual water content in oil layer using
200 ppm demulsifiers. The dashed line shows desired diluted bitumen residual
water content criteria (2.0%). Residual water content in oil layer with N/В ratio 4.0
is lower than that with N/В ratio 0.7. At N/В ratio 4.0, residual water content in oil
layer is close to desired diluted bitumen residual water content criteria (2.0%).

6

4

2

200 ppm Demulsifier

i !Water on top oil layer
Water in middle oil layer
Water at bottom oil layer

200 ppm Demulsifier

N/В ratio 4.0

Figure 5.16 Water content in oil layer (solids-free) adding 200 ppm demulsifiers

Figure 5.17 shows the photographs of brine in diluted bitumen (dilution ratios
0.7 and 4.0) 24 h emulsion samples adding 200 ppm PR₁ to PR₆ at 80 ⁰C. The
first sample is emulsion without any demulsifier as control. The second to the
seventh are emulsion adding 200 ppm PR₁ to PR₆. The pH of the brine is 8.3. The
positions of sampling water/ solid conten and solid distribution measurement are
also shown in the figure. Based on bottle test, for both dilution ratios 0.7 and 4.0,
emulsion samples adding 200 ppm PR₃ to PR₆ have better separation results than

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