Attempt ALL questions. 1. In the production of soya bean oil, the oil is extracted from the original beans using hexane as a solvent. The soya beans contain 12% w/w oil, the rest being insoluble bean...

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Attempt ALL questions.
1. In the production of soya bean oil, the oil is extracted from the original beans using hexane as a solvent. The soya beans contain 12% w/w oil, the rest being insoluble bean waste. 500 kg min-1 of soya beans are to be extracted. The bean waste leaving the process (known as raffinate) contains 0.5% w/w oil and 2% w/w hexane. The extract is 22% w/w oil and the rest is hexane. No bean waste leaves with the extract.
The extract is then passed to a distillation column which separates the mix into pure hexane, which is recycled back to the extractor for reuse, and 98.5% oil as final product. Hexane losses are made up by continuous make up from the hexane storage system.
(a) Draw a block diagram of the process incorporating all the information given in the question.
(b) Calculate (in kg min-1):
(i) the amount of extract leaving the extractor (ii) the amount of hexane required in the extraction stage (iii) the amount of both streams leaving the distillation stage
(iv) the amount of hexane make-up required to ensure the process is steady state.
Check your answer by carrying out an additional balance not already used in your calculation.

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Answered Same Day Dec 20, 2021

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Robert answered on Dec 20 2021

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Attempt ALL questions. 1. In the production of soya bean oil, the oil is extracted from the original beans using hexane as a solvent. The soya beans contain 12% w/w oil, the rest being insoluble bean...

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