JPS5863797A - Fish oil high yield collection by digestion process - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves heating and autolyzing fish bodies or fish dregs to make them acidic, and adding fish oil so that the oil content of the autolysed liquid is approximately 20% by weight to extract the oil content in the emulsion. This relates to a high-efficiency method for harvesting fish oil.

More specifically, one or more inorganic acids such as hydrochloric acid, sulfuric acid, or phosphoric acid, or organic acids such as phosphoric acid are added to the fish body or fish dregs to adjust the pH to 3.5 to 5.5, preferably 4 to 5. 5 to 45-65°C, preferably 50-6
Collection of fish oil by heating to 0'C [7] for autolysis, mixing and stirring fish oil so that the oil content of the autolysate becomes approximately 20% by weight, and extracting the oil content in the emulsion. There is method C.

Fish bodies or fish dregs are a source of highly unsaturated fatty acid-containing oil, but if the oil content of the raw material is less than 1.3% by weight using the Danpaku coagulation method (fishmeal production method) by heating, it will not be possible to extract the oil at all for commercial purposes. has been done. Furthermore, the present inventor has experimentally confirmed that oil cannot be extracted using the enzymatic digestion method when the raw material oil content is 4% by weight or less. In particular, the yield obtained by enzymatic digestion is poor because the fish oil forms an emulsion with indigestible protein, which hinders extraction.

In general, in the digestion method, surface active forces such as bile help form an emulsion of the raw material oil during digestion, and this emulsion strongly binds to the indigestible clove tissue protein of the skin and internal organs, so that the solid-liquid oil is mixed. makes three-phase separation difficult.

However, the present inventor believes that if the oil content of the peroxidized liquid is increased and the mixture is intimately mixed, the emulsion collides with the oil layer and is fused with the oil layer, and the emulsion is extracted, thereby facilitating three-phase separation. Therefore, it was clarified that when the oil content of the digestive fluid is increased beyond a certain level, it becomes easier to extract the fish oil from the emulsion and separate the three phases, increasing the yield of fish oil.

To explain the method of the present invention with reference to Figure 1, which illustrates the relationship between the oil content of the sample and the yield of fish oil when fish oil is not added/added to the digestive fluid, in the digestion method, line A indicates no addition of fish oil. Line B is a line showing the oil yield when fish oil is added to the raw material oil, and shows that the oil yield increases as the oil content of the raw material increases. It shows. For example, if the oil content of the raw material is 12% by weight, the oil yield is 6% by weight of the raw material, that is, the yield of the oil content -]5
It becomes 0% by weight. Extend this number by 2 to get the oil content by 20
% by weight, a yield of 100% by weight will be obtained.

Therefore, in the case of raw material fish with low oil content, if the oil content of the digestive fluid is increased to approximately 20% by weight, even if raw material fish 1005' containing oil in line B is digested and centrifuged, most of the oil will be removed. Make an emulsion and o2J2. (4% by weight of oil content) can be separated. However, this raw material has 100% digestive juice.
After adding about isy of fish oil to P and mixing it with the new type for about 1 hour, it was centrifuged and about 17.5 LJ- of oil was obtained.Excluding the amount of added oil, the oil yield was 251, and the oil content was 50 of
The weight percentage was changed to V.ru.

In short, in the present invention, the collection rate of fish oil in the digestive juice increases as the oil content of the fish oil in the digestive juice increases, and the collection rate increases when the oil content of the fish oil in the digestive juice is 20% by weight or more. This shows that the content can reach 10,000% by weight.

However, this fact does not limit the oil content of fish oil in the digestive juices to 20% by weight or more in the method c' of the present invention.

Next, an example of implementing the present invention will be shown.

Example l.

10Ky of sardines (oil content 8.1% by weight) were crushed,
-e and 0.6 tablespoons of 10% by weight hydrochloric acid were added to adjust the pH to 46, then heated to 60°C and digested for 8 hours with occasional stirring, followed by the addition of 1.2-13 fish oil. The mixture was gently stirred for 30 minutes, and the oil layer was centrifuged. Fish oil yield 0
．． 67-e, yield was 83.

If no added oil of 1.21 was added, the yield of fish oil would be 0.
16. , e (calculated value of 20 weight To) Since there was C, 0
．． The yield was increased by 15A (63% by weight of the calculated value).

Example 2゜Uozu 10Ky (oil content 9.2% by weight) was shaken and crushed, 10% by weight hydrochloric acid 0.9% was added to adjust the pH to 4.2, and then the pH was adjusted to 60% by weight.
℃ and digested for 3 hours with occasional stirring, 1.5p of fish oil was added thereto, gently stirred for 30 minutes, and the oil layer was separated using a centrifuge. Fish oil yield 0.8
3-g, yield 90%, if no added oil was added, the yield of fish oil was 0.2'l (31% by weight of the calculated value), so the yield increased by 0.54 [(59% of the calculated value)] Met.

Example 3 Crushed 2 (oil content 42% by weight) with 5 small horse mackerel, added 3 parts of water and 0.35 e of hydrochloric acid per 10 parts by weight to adjust the pH to 4.2, and heated to 55°C, stirring occasionally. After digesting for 15 hours, 800 mlO fish oil was added, stirred gently for 1 hour, and the oil layer was separated using a centrifuge.The yield of 0 fish oil was 95ml, yield 48;6, and the added oil was When it was not added, almost no fish oil was separated, resulting in an increase in yield of 95 ml.

[Brief explanation of the drawing]

FIG. 1 shows the relationship between sample oil content and fish oil yield in the cases where fish oil was not added/added to the digestive fluid. Patent Applicant: Pau 71 Institute Co., Ltd. Application Agent: Makoto Kunii (Shin Ding Me) R58-63797 (3) Procedural Amendment November 1980 Mr. Haruki Shimada, Commissioner of the Patent Office1, Indication of the case 11 Japanese Patent Application No. 161066 2 Title of the invention High rate extraction of fish oil by digestion method 3 Relationship with the amended person case Important! t >t'r needle + *ζ6
, The number of deficient inventions will increase due to the W amendment 7, Subject of amendment Detailed invention column 8 of the specification, Contents of amendment The following errors in the detailed explanation column of the specification will be corrected. 1 Page 2, line s 6, it says [...of fat-containing oil]. Correct it to read [...-fatty acid content...]. ■ Page 4, line 1 "...-5k) J"...
=St”. -Page 5, line 8, replace "ro, tsJ..." with "0.51J-...
"..." I corrected myself.

Claims (1)

[Claims] Add acid to fish bodies or fish dregs to adjust the pH to 3.5 to 5.5 and heat to -C45 to 65°C to produce an autolysing liquid such that the oil content of the autolysing liquid is approximately 20% by weight. A high-efficiency method for collecting fish oil using a digestion method, which is characterized by mixing and stirring fish oil and then separating it by standing or centrifuging.