Deep processing method of animal fat

Abstract

The invention discloses a deep processing method of animal fat, and relates to the technical field of animal fat processing. The deep processing method of the animal fat comprises the following steps:dissolving solid animal fat by using a solvent consisting of acetic acid and glycerol; cooling the liquid animal fat in stages; separating saturated stearic acid from oleic acid by using different solubilities and different condensation crystallization temperatures of the saturated stearic acid and the oleic acid in the solvent to increase the content of the oleic acid in the fat; then pressing the obtained crude oil under increased pressure to enable low-melting-point liquid acid to flow out so as to separate saturated fatty acid from unsaturated fatty acid to further increase the content ofthe oleic acid of the animal fat and the content of the saturated fatty acid. In a processing course, the organic solvent is used once only, moreover, the organic solvent is pollution-free and is environmentally friendly, subsequent separation is facilitated due to different condensation points of the acetic acid and the glycerol, the processing temperature is low, the oleic acid cannot be deteriorated or damaged, and thus, the nutritive value of the oleic acid is increased.

Description

technical field [0001] The invention relates to the technical field of animal fat processing, in particular to a deep processing method of animal fat. Background technique [0002] Fat is one of the three major nutrients for human beings and an important source of nutrition for us. Fat is divided into animal fat and vegetable fat. Among them, animal fat is sought after by modern people because of its unique aroma and rich taste. Tallow is fat obtained from the body of animals. It can be divided into fats and oils of terrestrial warm-blooded animals and poultry, such as butter, suet, lard, etc., which are generally solid, and its main components are triglycerides of palmitic acid and stearic acid; marine mammals and fish oils such as whale oil, fish oil, etc. The fats of terrestrial warm-blooded animals and poultry are mostly used as ingredients for processing into various delicious foods, which are often eaten by people, especially lard and butter, which are frequent visit...

AI Technical Summary

Problems solved by technology

[0004] When the applicant researched to increase the oleic acid content in animal fats, he found that in the current deep processing methods for increasing the oleic acid content in animal fats, on the one hand, he selected raw materials with high oleic acid content as the method for increasing the oleic acid content in oils. The disadvantage is that there are fewer types of raw materials, which cannot meet people's needs for oil diversity. On the other hand, when reducing the content of palmitic acid and stearic acid, most of them use multi-step organic solvent extraction methods combined with long-term high-temperature distillation to remove organic solvents. method, this method not only creates a new source of pollution, but also high temperature is likely to cause oxidative denaturation of oleic acid, resulting in a reduction in the nutritional value of oleic acid