Process for extracting fluoride-free shrimp oil from dried antarctic krill

Abstract

The invention discloses a process for extracting fluoride-free shrimp oil from dried antarctic krill. The process is characterized in that the process comprises the following steps of: (1) adding acetone to dried antarctic krill, extracting for three times, combining extracting liquid, and evaporating the extracting liquid in a rotation mode to obtain the shrimp oil; (2) filtering the extracting liquid to obtain shrimp residues after the extracting liquid is extracted at last time in the step (1), adding ethanol into the shrimp residues for extracting for three times, combining the extracting liquid, and evaporating the extracting liquid in a rotation mode to obtain a concentrate; (3) adding acetone into the concentrate for stirring and extracting for 0.5-1h twice, filtering and combining the filtrates obtained in the steps (1) and (2), and evaporating in a rotation mode to obtain the shrimp oil; and (4), combining the shrimp oil obtained in the step (1) and the shrimp oil obtained in the step (2), adding ethanol, coldly placing the mixture, removing a precipitate to obtain a supernate, coldly placing the supernate, removing a precipitate to obtain the supernate, and evaporating the supernate in a rotation mode to obtain the fluoride-free shrimp oil. According to the invention, the process for extracting the shrimp oil from the dried antarctic krill is optimized, and the yield of the shrimp oil is high; and because the obtained shrimp oil does not contain fluoride, the quality of the shrimp oil is improved, and contribution to development of related shrimp oil products of the antarctic krill is achieved.

Description

technical field [0001] The invention relates to a process for extracting fluorine-free shrimp oil from Antarctic krill. Background technique [0002] As one of the few trace elements with dual-threshold properties, fluorine plays an irreplaceable role in the construction of biological hard tissues and the promotion of the growth and development of biological organisms within an appropriate range. Conversely, too high or too low is not good for the growth of organisms. The average concentration of fluorine in the world's oceans is 1.30 mg / kg. The fluorine content in marine animals is higher than that in terrestrial animals, however, despite this, the fluorine content in most marine organisms is still not high, with an average of n×10 -4 %. However, the fluorine content of Antarctic krill is very high, reaching n×10 -1 %. [0003] Although Antarctic krill is not the only organism with fluorine-rich ability in the ocean, Antarctic krill is the largest marine biological res...

AI Technical Summary

Problems solved by technology

However, because the high fluorine content of Antarctic krill is harmful to human health, it brings certain difficulties to the direct utilization of this biological resource.

Some researches try to deshell and process fresh shrimp on board immediately after fishing, but the yield of protein is low and the waste of resources is large. Now some countries transport it back after fishing to be processed into oil, and the mixture of shrimp shell and protein is used as Feed, etc.