A Health company would like to produce medicinal oils from herb seeds. The herb seeds are...

  

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A Health company would like to produce medicinal oils from herb seeds. The herb seeds are ground and fed to a stirred tank (the extractor) along with a stream of liquid diethyl ether, (C.H.O) O, which extracts the oil from the seeds. As shown in the figure, the solvent entering the extractor is a combination of recycled and fresh diethyl ether. The ratio of the total diethyl ether solvent to the seeds entering the extractor is 2.8 kg diethyl ether/kg seeds. The ground seeds are suspended in the liquid, and essentially all the oil in the seeds is extracted into the diethyl ether. The extractor output passes to a filter where the solids are collected and form a filter cake. The filter cake is a wet solid, with 65.0 mass% seed solids and the balance seed oil and diethyl ether, the latter two (oil and diethyl ether) in the same ratio in which they are present in the filtrate solution leaving the Filter. The filter cake is discarded, and the liquid filtrate is fed to an evaporator in which the diethyl ether is vaporized, and the oil remains as a liquid when it leaves the evaporator. The oil is then stored in containers. The diethyl ether vapor is subsequently cooled and condensed, and the liquid diethyl ether condensate is recycled to the extractor. The herb seeds are assumed to be made up only of oil and solids. The composition of the seeds is 1.A.0 mass% oil, with the rest solids. Similar to Problem 1, A is the last digit of your ASU ID. For example, if your ASU ID is 1212012345, then A=5 and the seeds have 1.A.0 mass% oil = 15.0 mass% oil. Condenser Recycled Diethyl ether Diethyl ether () (Fresh) EXTRACTOR Ground herb seeds FILTER Filtrate () Diethyl ether & oil only Wet filter cake Diethyl ether (v) EVAPORATOR Oil (a) Draw and label a flowchart of the process. Note: Please redraw the flowchart by hand. Cutting-and-pasting the above diagram will not be graded (b) Identify all the system (s) and point(s) where Material Balances are usually made. Write all the possible Material Balance equations for each. (Hint: There should be five.) (c) Do the degree-of-freedom analysis on each of the system(s) and point(s) you identified in (b) (d) Which system will you use first to solve for some of the unknowns? Why? Formulate a solution strategy on how you will go about solving the unknowns for this system. In each step of your strategy, indicate which unknowns will be solved. A Health company would like to produce medicinal oils from herb seeds. The herb seeds are ground and fed to a stirred tank (the extractor) along with a stream of liquid diethyl ether, (C.H.O) O, which extracts the oil from the seeds. As shown in the figure, the solvent entering the extractor is a combination of recycled and fresh diethyl ether. The ratio of the total diethyl ether solvent to the seeds entering the extractor is 2.8 kg diethyl ether/kg seeds. The ground seeds are suspended in the liquid, and essentially all the oil in the seeds is extracted into the diethyl ether. The extractor output passes to a filter where the solids are collected and form a filter cake. The filter cake is a wet solid, with 65.0 mass% seed solids and the balance seed oil and diethyl ether, the latter two (oil and diethyl ether) in the same ratio in which they are present in the filtrate solution leaving the Filter. The filter cake is discarded, and the liquid filtrate is fed to an evaporator in which the diethyl ether is vaporized, and the oil remains as a liquid when it leaves the evaporator. The oil is then stored in containers. The diethyl ether vapor is subsequently cooled and condensed, and the liquid diethyl ether condensate is recycled to the extractor. The herb seeds are assumed to be made up only of oil and solids. The composition of the seeds is 1.A.0 mass% oil, with the rest solids. Similar to Problem 1, A is the last digit of your ASU ID. For example, if your ASU ID is 1212012345, then A=5 and the seeds have 1.A.0 mass% oil = 15.0 mass% oil. Condenser Recycled Diethyl ether Diethyl ether () (Fresh) EXTRACTOR Ground herb seeds FILTER Filtrate () Diethyl ether & oil only Wet filter cake Diethyl ether (v) EVAPORATOR Oil (a) Draw and label a flowchart of the process. Note: Please redraw the flowchart by hand. Cutting-and-pasting the above diagram will not be graded (b) Identify all the system (s) and point(s) where Material Balances are usually made. Write all the possible Material Balance equations for each. (Hint: There should be five.) (c) Do the degree-of-freedom analysis on each of the system(s) and point(s) you identified in (b) (d) Which system will you use first to solve for some of the unknowns? Why? Formulate a solution strategy on how you will go about solving the unknowns for this system. In each step of your strategy, indicate which unknowns will be solved.