• What is solvent extraction?
  • Solvent extraction consists in washing the prepared material in a countercurrent multistage process to enable a reasonable quantity of solvent to extract a maximal amount of oil. Major progresses in solvent extraction relate to plant production capacity increases which propelled technological improvements.
  • What solvents are used in oil extraction?
  • Various alcohols, isohexane, heptane, butane ¨C many other solvents have found applications in niche markets. For the standard oil removal plant, only isohexane ¨C an isomer with properties very close to hexane – has replaced hexane in a significant number of extraction plants.
  • Which oil extraction process is best?
  • This combination combines the best of each system: the pressing operation removes the higher percentages of oil which are by far the easiest to squeeze out of the solids, and the solvent extraction process is best at removing oil from about 20% down to near ?%.
  • How much oil can be extracted using solvent extraction method?
  • For such processes, it is possible to achieve oil yields in excess of 95% with a solvent recovery of over 95% which in compare to 60 to 70% oil yield by mechanical expeller pressing method. The solvent extraction method will remove all but about ?% of residual oil, uses less hp, and requires less maintenance.
  • What is a good residual oil content for a hexane extractor?
  • A minimal residual oil content in the meal coming out of the hexane extractor is a clear benefit for a crushing plant; the more oil yield the better revenue for the crusher. In a modern and efficient extraction plant, a residual oil content ¡Ü?0.5% for soybean meal is expected.
  • What solvent is used to make soybean protein concentrate?
  • It should be noted that other solvents may be required to produce different and specific products; for example, an alcohol-water mixture is used in an additional extraction step (after hexane extraction) to produce soy protein concentrate (or ¡°SPC¡±) by removing the sugars from standard soybean meal (Wang et al., 2004).