Discussion
Miscella is the name given to
Answer: A
Correct answer: The oil and solvent mixture
Miscella is the solution of oil in solvent leaving the extractor, typically 25 to 30 per cent oil in hexane. It is sent to a distillation train where the solvent is evaporated for reuse and the crude oil recovered.
The other three name different streams: spent meal is the extracted flakes, which go to a desolventiser-toaster; gums are the phospholipids removed in degumming; and soapstock is the alkali-neutralisation by-product. Keeping the streams distinct is worth doing, since each has its own recovery route and its own value.
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