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Miscella Distillation

Solvent Extractor

Miscella Distillation

"Miscella" is the industry term used for the oil/solvent mixture that leaves the solvent extractor. The miscella leaving the solvent extractor contains 70-80% solvent by weight. The purpose of distillation is to thermally separate the miscella into two things - a liquid oil fraction and a solvent vapour fraction. Optimum use of available heat in the discharge vapour stream from the de-solventiser toaster, the available heat from the condensate flash tank, and the heat recovery within distillation itself helps maximize the energy efficiency of the distillation process.

With Desmet Ballestra, optimum efficiency is achieved through perfection in size and design of the distillation equipment. The miscella tank is amply sized so that it acts as a perfect buffer after extraction to ensure the smooth flow through distillation. This in turn, minimizes second stage evaporator steam. Maximum heat is recovered from the DT exhaust vapours through 30% larger surface area in the first stage evaporator. This also minimizes second stage evaporator steam. The recovered flash steam is used in order to minimize fresh steam in the second stage evaporator. The oil dryer steam ejector exhaust is recovered in oil stripper. Miscella or oil heat exchanger is used to recover heat from hot oil in order to minimize the steam at the second stage evaporator. This design ensures a whopping 75% lower residual solvent in oil due to maximized steam/oil contact. This is due to its improved sieve-tray type oil stripper as opposed to the conventional disc/donut designs. In this design, there is a requirement for 15°C lower miscella temperature. This helps save second stage evaporator steam and reduces degradation of the crude oil prior to oil refining process. The 3-pass second stage evaporator design also enables fast miscella tube velocity and minimizes tube fouling and frequency of cleaning.

  • It uses low steam and power.
  • It includes a specially designed stripper for removal of solvent.
  • It also comes with a specially designed dryer to remove moisture.
  • Comes fitted with Hydro-clones that are used for filtration of miscella before entering the distillation stage.
  • The design enables the sludge to deposit in the lower evaporator tube avoiding frequent cleaning.
  • It’s specially designed condensers enable optimum solvent condensation at reduced vacuum and for a wide range of cooling water temperature.
  • It’s has specially designed vapour absorption and stripping section that helps absorb the vent’s un-condensed hexane before escaping to the atmosphere thereby, preventing solvent loss.
  • It enables lower effluent generation.
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We are pioneered in Edible oil seed processing plant & Machinery (cotton seed, soya bean, Rice Bran, sunflower seed & other vegetable oil seeds). We are the team of experienced technical people & Young Innovative Engineers; they are specialized in vegetable oil seeds/oil seed processing technology & also have been involved in installation of many vegetables oil mills in India & abroad. We are exporting our plant and machinery to various countries around the world.


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