If the fractional recovery of light key in the distillate is FR, then light key in the feed is(a) DxD= (FRD)+FxLK(b) DxD= (FRD)/FxLK(c) DxD= (FRD)FxLK(d) DxD= (FRD)I have been asked this question by my school principal while I was bunking the class.The origin of the question is Key Components of Multi component Distillation topic in portion Key Fractionation Concepts of Distillation Design

If the fractional recovery of light key in the distillate is FR, then

1.	If the fractional recovery of light key in the distillate is FR, then light key in the feed is(a) DxD= (FRD)+FxLK(b) DxD= (FRD)/FxLK(c) DxD= (FRD)FxLK(d) DxD= (FRD)I have been asked this question by my school principal while I was bunking the class.The origin of the question is Key Components of Multi component Distillation topic in portion Key Fractionation Concepts of Distillation Design
Answer» Correct OPTION is (c) DXD= (FRD)FXLK Easy EXPLANATION: The definition of the fractional RECOVERY is DxD= (FRD) FxLK, while gives us the material balance on feed and distillate DxD= (FRD).

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