A Primer on Oils Processing Technology

Abstract

In the early days of oilseed production, functions were often far removed, and actions taken by one operation were done for optimization of its own performance with little consideration on impacts made on subsequent processes. Within the last few years, the emphasis has changed from stand‐alone operations toward the integrated manufacturing facility, producing a more complete range of value‐added products from the raw seed to the dinner table. During this transition, operations have become more dependent on each other, as the individual functions involved must now consider the impact of their actions on the total process. At the same time, the scope of knowledge each operation must have of other functions has expanded, and it is important that at least a basic understanding of the “big picture” be available to the decision maker. The purpose of this Chapter is to provide an overview of the typical processes and interrelations associated with a total integrated facility.

Effect of pretreatment with microwaves on oxidative stability and nutraceuticals content of oil from rapeseed

“…Solvent extraction gave higher recovery of oil from rapeseed compared with cold pressing (Table 1). It is known that a low amount of oil (about 1%) remains in defatted material after oil extraction by solvent (Anderson, 1996). Therefore, oil extraction by solvent, because of complete extraction of oil from oilseed, could give an accurate oil content of samples, in order to compare oil extraction yield from treated and untreated rapeseed samples by press.…”

“…Solvent oil extraction is usually applied to seeds with low content of oil (<20%), such as soybean. Pressing method is applied for seeds with a high amount of oil, such as rapeseed, but this method is relatively inefficient and a large portion of the oil is left in the meal (Anderson, 1996). However, residual oil in the meal can be extracted afterwards by solvent.…”

“…No thermal treatment is used in the cold press method, in contrast to hot press, where seeds are pretreated by heat, this is known as cooking (Anderson, 1996). Oil obtained from cold pressing of oilseeds has generally better preserved native properties.…”

New approaches in deacidification of edible oils––a review

“…The advantages of miscella refining over continuous chemical deacidification are: (i) dilute caustic soda solution (10-14°Be) can be used satisfactorily; (ii) the wide specific gravity differential between the lye and oil-hexane solution increases the efficiency of the centrifugal separation, and it is possible to operate the separators at 50% above their rated capacity in terms of refined oil produced; (iii) the quantity of soapstock produced is extremely low in the neutral oil--that is to say, the refining losses is at a minimum as compared to continuous alkali refining; (iv) the bleach colour of the final oil is superior to that obtained by nonmiscella refining and can be varied by increasing the percentage of refining caustic without serious losses in saponification; and finally, (v) elimination of water washing (Anderson, 1996;Hodgson, 1996).…”

Energy Life-Cycle Assessment of Soybean Biodiesel Revisited

“…Hot air and cooling water are used in the final heating and drying of the oil. More details about the processing can be found in Anderson (2005).…”