a) Draw a flowchart of the process. Label the two feed streams (soybeans and solvent) and the leaving streams (residual solvents and extract). (b) The soybeans contain 18.5 wt% oil and the remainder insoluble solids and the hexane is fed at a rate corresponding to 2 kg hexane per kg of soybeans. The residual solids leaving the extraction unit contain 35.0 wt% hexane, as well as all of the “non-oil” solids that entered with the soybeans, and 1.0 wt% oil that entered with the beans. The feed rate of dried, flaked soybeans is 1000 kg/h. Correctly identify the basis you will use to solve this material balance. (c) Determine the degrees of freedom for this problem. Can the problem be solved? (d) Based on the quantities listed in part (b), calculate the mass flow rates of extract and residual solids and the composition of the extract.
1.) In the production of soybean oil, dried and flaked soybeans are brought into contact with a solvent (often that solvent is hexane) that extracts the oil and leaves behind residual solids and a small amount of oil.
(a) Draw a flowchart of the process. Label the two feed streams (soybeans and solvent) and the leaving streams (residual solvents and extract).
(b) The soybeans contain 18.5 wt% oil and the remainder insoluble solids and the hexane is fed at a rate corresponding to 2 kg hexane per kg of soybeans. The residual solids leaving the extraction unit contain 35.0 wt% hexane, as well as all of the “non-oil” solids that entered with the soybeans, and 1.0 wt% oil that entered with the beans. The feed rate of dried, flaked soybeans is 1000 kg/h.
Correctly identify the basis you will use to solve this material balance.
(c) Determine the degrees of freedom for this problem. Can the problem be solved?
(d) Based on the quantities listed in part (b), calculate the mass flow rates of extract and residual solids and the composition of the extract.
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