In a two-stage process, acid is extracted from water into hexanol in a liquid-liquid extraction unit (i.e. extractor) and the extract is sent to a distillation column. Assume that water is completely insoluble in hexanol (think about what this means- hint: what goes into the distillation column and what does not?). A mixture of18 wt% acid and the balance water is fed to the extractor. Pure hexanol is fed to the extractor to extract the acid. The water-rich stream leaving the extractor is 99.5 wt% water and the balanced acid. The hexanol-rich extract is the part (hint: that goes to the distillation column). The composition of the distillate is 96 wt% acid and the balance hexanol. The bottoms stream contains 97.2 wt% hexanol and recovers 95% of the hexanol fed to the extractor. 1. Draw the process and label every single info. 2. Calculate the percentage of acid in the process feed that is recovered in the distillate stream. You must assume a basis. Hint: please assume a basis for the pure hexanol stream.
In a two-stage process, acid is extracted from water into hexanol in a liquid-liquid extraction unit (i.e. extractor) and the extract is sent to a distillation column. Assume that water is completely insoluble in hexanol (think about what this means- hint: what goes into the distillation column and what does not?). A mixture of18 wt% acid and the balance water is fed to the extractor. Pure hexanol is fed to the extractor to extract the acid. The water-rich stream leaving the extractor is 99.5 wt% water and the balanced acid. The hexanol-rich extract is the part (hint: that goes to the distillation column). The composition of the distillate is 96 wt% acid and the balance hexanol. The bottoms stream contains 97.2 wt% hexanol and recovers 95% of the hexanol fed to the extractor.
1. Draw the process and label every single info.
2. Calculate the percentage of acid in the process feed that is recovered in the distillate stream.
You must assume a basis. Hint: please assume a basis for the pure hexanol stream.
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