Preparation method of aroma rapeseed oil

Abstract

The invention discloses a preparation method of aroma rapeseed oil, wherein the preparation method comprises the following main procedures: selecting rapeseeds, removing impurities, and removing macadam and clods, wherein the impurity content is smaller than 0.1% and the rapeseed content in the screen underflow is smaller than 0.5% after the screening procedure; frying the rapeseeds at 140-145 DEG C; squeezing the rapeseeds through a squeezer and controlling the thickness of an oil cake to be smaller than 1.5mm to obtain crude oil; primarily deslagging the squeezed crude oil through an oil clarifying box, and pumping the crude oil in a blade filter to be filtered, wherein the insoluble impurity in the filtered crude oil is smaller than 0.2%; obtaining clean crude oil, controlling the operation temperature at 65-70 DEG C and controlling the water temperature at 70-75 DEG C to perform hydration degumming; washing the clean crude oil twice by virtue of softened water, drying and dewatering at vapor pressure of 4-5 Mpa; stirring the clean crude oil at a rotating speed of 30 r / min (revolutions per minute), and cooling until the oil temperature is lower than 80 DEG C; and filtering the clean crude oil in a frame filter to obtain the aroma rapeseed oil. The prepared rapeseed oil generates full-bodied fragrance, and the nutrition ingredients and physiological active ingredients in the rapeseed oil are kept to the maximum.

Description

technical field [0001] The invention relates to a method for preparing fragrant rapeseed oil. Background technique [0002] The fatty acid composition of rapeseed oil has changed greatly in recent years, and there is almost no fixed range. Due to the influence of origin, soil, climate and varieties, there are also certain changes. Generally, the content of erucic acid is low in cold zone areas, and the content of linoleic acid is relatively high; the opposite is true for areas with higher temperatures. Double-bottom rapeseed is popularized in southern my country. Double-bottom rapeseed oil is a brand new oil. The fatty acid composition is very different from traditional rapeseed oil. The main fatty acids are: 51-70% oleic acid, linoleic acid 15-30%, 5-14% linolenic acid, 2.5-7% palmitic acid, <3% erucic acid, etc. The sulfur content of the cake is far lower than that of traditional rapeseed oil, and it is a high-quality protein resource. However, the aroma of rapeseed oi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing strong-flavored rapeseed oil, so that the aroma of the extracted rapeseed oil has the quality of the traditional artificially squeezed rapeseed oil aroma, so as to change the current machine-pressed rapeseed oil that is not strong in aroma to meet the needs of consumers; at the same time, ensure that the oil extraction rate is not lower than that of large-scale machine oil extraction