Moderately processed vegetable oil and preparation method thereof

Abstract

The invention provides a moderately processed vegetable oil and a preparation method thereof. The preparation method comprises the following steps: carrying out degumming twice (first deep degumming and then combining the secondary degumming) to realize efficient degumming and remove high boiling impurities as many as possible, so as to carry out alkali refining and neutralization at low temperature; then pre-decoloring with waste clay used for recycling, adding clay, decoloring under vacuum condition, and removing residual soap, phosphorus, pigment, metal, and the like; and finally carrying out combined deodorization of the plate column and the packed column, carrying out thermal decoloration, and removing fatty acid and micro-molecular stinking material, so as to reduce the generation of trans fatty acid, reduce the loss of vitamin E, save energy, reduce consumption, and improve the oil quality. According to the invention, vegetable oil products with low content of trans fatty acid (less than 1.0 %) and low loss rate of vitamin E can be produced.

Description

technical field [0001] The invention relates to oil refining technology, in particular to a moderately processed vegetable oil and a preparation method thereof. Background technique [0002] In recent years, with the improvement of people's requirements for the quality of edible oil, the rich experience in vegetable oil production, the development of automation and mechanization, the processing technology of vegetable oil has been continuously improved, and the degree of refining has been continuously improved. Indicators continue to improve, greatly improving the safety of cooking oil. However, the higher the degree of processing is not the better, too high will result in over-processing. According to statistics, over-processing is common in domestic oil and fat enterprises. Over-processing causes waste of resources and energy, and aggravates environmental pollution. Over-processing also loses most of the beneficial micronutrients naturally present in oils and fats, and p...

AI Technical Summary

Problems solved by technology

At present, in the oil refining process of domestic oil companies, there are generally high alkali refining deacidification temperature (75-85 ℃), large amount of alkali addition, serious loss of neutralized oil, and large amount of bleaching clay (10-20kg / T oil). Deodorization mostly adopts disc plate tower, high deodorization temperature (240-250°C or even higher), long deodorization time (1.5-2h) and other problems, so that the trans fatty acid in refined oil can reach between 2% and 4%, vitamin E Loss up to 40%