Method for pressing rapeseed oil by physical method

Abstract

The invention relates to a method for pressing rapeseed oil by a physical method, which solves the defects of the prior art that rapeseeds are not good seeds harvested in a planting base and are not picked and separated, more importantly, harmful technologies of leaching, refining by alkali, and the like which can seriously destroy the internal quality of finished oil are adopted to cause the damage and the pollution to the rapeseed oil by a chemical solvent and damage to the natural nutrient content of the rapeseed oil so that the traditional rapeseed oil is harmful to the health and the long life of an eater and in addition, the traditional rapeseed oil is pressed by mixing materials so that the levels of the rapeseed oil can not be divided, and the traditional rapeseed oil can not be instantly eaten and needs to be boiled fro a cold dish with sauce. The method is characterized by comprising the following steps of: after removing dust and ash of good rapeseeds harvested in the planting base and choosing and classifying the good rapeseeds, firing the good rapeseeds between 50 DEG C and 70 DEG C; then, leaching and separating crude oil; heating the crude oil to a temperate ranging from 110 DEG C to 130 DEG C; filtering and separating the rapeseed oil into two levels of a third international standard and a fourth international standard; after cooling the rapeseed oil to a temperature ranging from 5 DEG C to 15DEG C, heating to a temperature ranging from 140 DEG C to 160 DEG C; and refining the rapeseed oil. The invention is used for pressing rapeseed oil.

Description

technical field [0001] The invention belongs to the B44 category in the international patent classification, that is, separation technology, in particular a method for extracting rapeseed oil by physical method. Background technique [0002] The purpose of the traditional rapeseed pressing process is to separate the oil contained in the rapeseed. The process generally includes dust removal, ash removal, steaming and frying, pressing, and then refining and decolorization to become finished rapeseed oil. Although this method can also press and separate rapeseed oil, its disadvantages are: the rapeseed used for oil extraction is not the fine variety rapeseed harvested at the planting base; the rapeseed used for oil extraction has not been selected and separated; Because it adopts leaching, alkali refining and other harmful processes that seriously damage the internal quality of the finished oil, resulting in damage and pollution to the oil by the chemical solvents used, thus de...

AI Technical Summary

Problems solved by technology

Although this method can also press and separate rapeseed oil, its disadvantages are: the rapeseed used for oil extraction is not the fine variety rapeseed harvested at the planting base; the rapeseed used for oil extraction has not been selected and separated; Because it adopts leaching, alkali refining and other harmful processes that seriously damage the internal quality of the finished oil, resulting in damage and pollution to the oil by the chemical solvents used, thus destroying the natural nutrients of rapeseed oil and harmful to the health and longevity of the eaters In addition, the traditional rapeseed pressing process is mixed pressing, so the grades of the produced rapeseed oil cannot be distinguished; moreover, it cannot be eaten immediately, especially when it is cold, it still needs to be boiled and refined