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What is distillation reflux ratio?

(a) Ratio between the boil up rate and the take-off rate

(b) Product of boil up rate and the take-off rate

(c) Sum of boil up rate and the take-off rate

(d) Ratio between the take-off rateand boil up rate

I had been asked this question during an interview.

My question is based upon Distillation of Binary Mixtures in division Distillation of Food Processing Unit Operations

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Best answer
Right option is (a) Ratio between the boil up rate and the take-off rate

The explanation: The Reflux ratio is the ratio between boil up rate and take-off rate. It is the relation between the amount of reflux that goes back down the distillation column and the amount of reflux that is collected in the collection flask.

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