Method of extracting fish oil from squid skin

Abstract

The invention relates to a method of extracting fish oil from squid skin. The method comprises extracting and separating fish oil from squid skin through extraction solvents such as an ether, an esteror an alkane, and evaporating the extraction solvents through rotary evaporation so that the extraction solvents are successfully separated from the fish oil and the fish oil product is obtained. Themethod can extract fish oil from fish skin wastes and retain the nutrients such as oleic acid, DHA and EPA. The method changes the fish skin into valuables, has simple and easy processes and utilizesrenewable extraction solvents.

Description

technical field

[0001] The invention belongs to the field of fish oil extraction and relates to a method for extracting fish oil from cod skin. Background technique

[0002] Fish skin is rich in fish oil. As a nutrient, fish oil contains unsaturated fatty acids such as oleic acid, EPA, and DHA, accounting for about 2.78% of the weight of fish skin. Fish skin is a kind of waste, if the fish oil in the fish skin can be extracted, so that resources can be recycled, it will be of great significance.

[0003] In terms of patented inventions, Tao Ningping et al. (CN104194911A) invented and disclosed a method for refining tilapia oil. The head of tilapia processing waste is used as raw material, and after being chopped, it is hydrolyzed by compound protease under certain conditions. , and then undergo centrifugation to obtain crude fish oil, and decolorize the crude fish oil under certain conditions to obtain refined fish oil. In the present invention, the yield of crude fish oil...