Process for preparing maize germ oil in proper processing manner

Abstract

The invention relates to a process for preparing vegetable oil, and particularly relates to a process for preparing maize germ oil in a proper processing manner. The process comprises the following steps of: (1) a low-temperature squeezing crude oil preparation process, including preheating maize germs, which have skin impurity content of 10-30 percent and moisture content of 5-10 percent, to 40-50 DEG C, and squeezing oil directly in a low-temperature squeezer to prepare crude oil; (2) a refining process, including refining the maize oil by adopting complex enzyme; (3) an adsorption method, including removing fungaltoxin with a composite adsorbent prepared from magnesium silicate, activated carbon, activated clay and silicon dioxide; and (4) a color reversion controlling process, including removing phosphorus and metal ions, decolorizing by utilizing the activated white clay and activated carbon mixed preparation, and deodorizing by utilizing a deodorizing agent. The process can improve the oil yield and prepare maize germ oil products with excellent quality.

Description

technical field [0001] The invention relates to a method for preparing vegetable oil, in particular to a process for preparing corn germ oil through moderate processing. Background technique [0002] Corn oil (corn germ oil) is not only rich in unsaturated fatty acids, but also rich in nutritional and active ingredients such as vitamin E, sterols, squalene, polyphenols, etc. It is the first health care vegetable edible oil recommended by the International Food and Agriculture Organization. However, due to the late start of corn oil processing in my country, the small scale of enterprises, and low technological innovation capabilities, the current production and refining technology of corn oil basically uses the traditional oil technology, which has many shortcomings. Degumming, deacidification, decolorization, and deodorization are generally carried out after high-temperature pressing. , dewaxing and other traditional refining processes lead to over-processing of corn oil pro...

AI Technical Summary

Problems solved by technology

However, the leaching method also has disadvantages: a lot of equipment and a large investment; the composition of the crude oil is complex, requiring strict refining treatment, and the oil flavor loss is large; the wet meal has a large denaturation during the high-temperature desolventization process; the use of organic solvents increases the tediousness of the process. Sex, reduce the safety of production, cause environmental pollution, residual trace organic solvents in refined oil are harmful to human health

Although the water extraction method has unique advantages over the traditional pressing and leaching methods, it can separate oil and protein at the same time, and the mild processing conditions enable the protein to maintain high nutritional value and functional properties, and dissolve pigments and other toxic substances. However, the mechanical shear force and rolling force applied to the oil by water extraction are not enough to completely destroy the cell wall of plant tissue, resulting in low oil yield and low protein recovery, especially for oil with low oil content The oil yield of the seeds is very low, and part of the oil is combined with protein, which makes the product easily oxidized and rancid

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