Method for preparing aromatic rapeseed oil

Abstract

The invention discloses a method for preparing aromatic rapeseed oil. The method comprises the following steps: (1) wetting and tempering, namely feeding rapeseeds into a wetting device, spraying water for wetting, and conveying the rapeseeds into a tempering device for tempering; (2) frying and smoking, and removing the glucosinolate decomposition products; (3) pressing to prepare crude rapeseed oil; and (4) crystallizing and filtering the crude rapeseed oil, thereby obtaining the aromatic rapeseed oil. The preparation method disclosed by the invention is simple and easy to operate, any chemical additive does not need to be added in the preparation process, the wastewater and waste gas pollution is avoided, the prepared aromatic rapeseed oil is strong in flavor, the content of total glucosinolate is extremely low, the residual oil content of the rape seed cake is low, and the oil extraction efficiency of the rapeseeds is high.

Description

technical field

[0001] The invention relates to the technical field of edible oil processing, in particular to a preparation method of fragrant rapeseed oil. Background technique

[0002] Rapeseed contains about 4% glucosinolates. Glucosinolates degrade under the action of myrosinase under humid and hot conditions, and decompose into isothiocyanate, thiocyanate, oxazolidinethione and nitrile compounds, which are collectively referred to as total glucosinolates. Decomposition products can inhibit the absorption of iodine by the thyroid gland of animals, resulting in metabolic disorders and a pungent smell. Therefore, the above-mentioned decomposition products should be removed during the pressing process of fragrant rapeseed oil, so that the total glucosinolates in the pressed rapeseed oil In tiny amounts, it has the pure, full-bodied aroma of canola oil. Luzhou-flavored rapeseed oil is light brown, clear and transparent, and has a strong fragrance. It is pure pressed oil, ...

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