Spot fork-tail catfish oil and preparation method thereof

Abstract

The invention discloses the channel catfish oil and a preparation method thereof. The method comprises: (1) the preparation of crude oil: leftover is chosen, classified, crushed and steam-cooked to separate and extract crude oil; (2) refining the crude oil, the method comprises: alkali refining and deacidification and concentrated alkali is adopted for alkali refining and deacidification at low temperature, salty boiled water is added and Chinese honeylocust fruit is centrifuged from the mixture after static placing and centrifuging; the mixture is cleaned by water to remove sundries and then dehydrated, decolorized and deodorized. Fish oil of much higher quality can be produced after further deacidification, deodorization, freezing and degreasing. The obtained fish oil comprises 6-10 percent of EPA, 5-12 percent of DHA, 20-27 percent of oleic acid, 7 -11 percent of linoleic acid, 3-6 percent of linolenic acid, 1-5 percent of C20:4 and 15-22 percent of C16:1 and has comparatively high medical and health-protection function, therefore, the channel catfish oil is a significant dietary source of functional fatty acid with great market potential. Meanwhile, compared with average oil processing, the method of the invention has much lower energy consumption and can better maintain the quality of the made fish oil.

Description

technical field [0001] The invention relates to a method for refining channel catfish oil, in particular to a method for refining channel catfish oil from leftovers produced in processing channel catfish fillets. Background technique [0002] Channel catfish, also known as groove gills, are named for the obvious irregular black spots on both sides of their bodies. Channel catfish is the main freshwater farmed fish in the United States. Because of its strong adaptability, easy breeding, no bone spurs and delicious meat, channel catfish has become a breeding and fishing target that has attracted worldwide attention. In 1984, my country introduced it from the United States for the first time. At present, 24 provinces and cities in China have cultivated it, and formed a major economic industry for processing and exporting fish fillets. However, with the further expansion of the processing scale, more and more by-products of channel catfish fillet processing have been produced, ...

AI Technical Summary

Problems solved by technology

"Research on Supercritical Carbon Dioxide Extraction of Soft-shell Turtle Oil" published in "China Oils and Fats" 2003 Volume 28 No. 10 discloses the method of extracting and separating soft-shelled turtle oil from soft-shelled turtles. There is a big difference between different types, and the cost of supercritical technology is high, which is not suitable for industrial production

After searching, the relevant fish oil production technology also includes "Extraction, Refining and Analysis of Fatty Acid Composition of Gemstone Fish Oil" in "Food Science", Volume 27, Issue 7, 2006, "Ammonia Method" in "China Marine Medicine", Volume 21, Issue 3, 2002 Research on the Technology of Extracting Fish Oil", "Study on the Technology of Extracting Fish Oil by Traditional Light Alkaline Hydrolysis" in "Journal of Shanxi Medical University", Volume 31, Issue 6, 2000, "Preparation of Tilapia Oil in Qilu Fishery, Volume 22, Issue 7, 2005 and its fatty acid composition analysis", "Guangzhou Food Industry Science and Technology" 1999 15 volumes 1 phase "discussion on the process of comprehensively utilizing dace to process leftover fish heads", and the patent document "a kind of eel bone oil and its production method" ( Patent No. 200410026812.X) etc., but these methods all have big difference and deficiency with this method no matter on technology, raw material, product