In the production of soybean oil, dried and flaked soybeans are brought into contact with a solvent (often hexane) that extracts the oil and leaves behind the residual solids and a small amount of oil. a) Draw a flowchart of the process, labeling the two feed streams (beans and solvent) and the cleaving streams (solids and extract). The soybeans contain 20.5 wt% oil and the remainder insoluble solids, and the hexane is fed at a rate corresponding to 2 kg hexane per kg beans. The solidsstream leaving the extraction unit contains 35 wt% hexane, all of the non-oil solids that entered with the beans, and 0.75% of the oil that entered with the beans b) For a feed rate of 1250 kg/h of dried flaked soybeans, calculate the mass flow rates and compositions of the extract and residual solids. Extract: ______ kg/h Solids: _______kg/h wt% oil ____ % wt% oil ____ % wt% hexane ____ % wt% hexane ____ % wt% non solids ____ %
In the production of soybean oil, dried and flaked soybeans are brought into contact
with a solvent (often hexane) that extracts the oil and leaves behind the residual solids
and a small amount of oil.
a) Draw a flowchart of the process, labeling the two feed streams (beans and solvent)
and the cleaving streams (solids and extract).
The soybeans contain 20.5 wt% oil and the remainder insoluble solids, and the
hexane is fed at a rate corresponding to 2 kg hexane per kg beans. The solidsstream leaving the extraction unit contains 35 wt% hexane, all of the non-oil
solids that entered with the beans, and 0.75% of the oil that entered with the
beans
b) For a feed rate of 1250 kg/h of dried flaked soybeans, calculate the mass flow
rates and compositions of the extract and residual solids.
Extract: ______ kg/h Solids: _______kg/h
wt% oil ____ % wt% oil ____ %
wt% hexane ____ % wt% hexane ____ %
wt% non solids ____ %
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