Food or edible material: processes – compositions – and products – Processes – Extraction utilizing liquid as extracting medium
Reexamination Certificate
1999-08-04
2001-04-10
Weier, Anthony J. (Department: 1761)
Food or edible material: processes, compositions, and products
Processes
Extraction utilizing liquid as extracting medium
C426S437000, C426S478000, C426S479000, C426S487000
Reexamination Certificate
active
06214396
ABSTRACT:
The present invention relates to a process for extracting fish oil.
The invention relates also to an installation for implementing such a process and also to the resulting products.
Various processes are known for the manufacture of fish meal and fish oil. Those more or less complex processes, which treat various types of oil-yielding fish, such as sardines, anchovies, capelins and herrings or menhadens, depending on the countries concerned, generally consist in cooking the raw material (that is to say, the fish) and then in transferring the cooked product into a decanter in order to remove the water; the water is treated in order to recover oils, and the solid material is introduced into a press which separates the liquid and the solid materials. The solid materials are dried and constitute fish meal used, for example, in animal feed.
The recovered liquids follow various treatment routes in order to undergo separation of the sludges and the oils and also the waters to be discarded.
That treatment process has the disadvantage of recovering only the oil, the solid materials being products of very inferior quality which are suitable for animal feed only under certain conditions.
The object of the present invention is to provide a process and an installation for the manufacture of fish oil which enable the value of the products to be enhanced and permit the recovery not only of the oil, but also of the high-quality solid materials which can be used in human foodstuffs.
To that end, the invention relates to a process of the type defined above, characterised in that;
a) the fish is prepared by removing its head and viscera (it is also possible to use fish waste: filleting waste, fish heads),
b) the fish is cooled to a low positive temperature and it is maintained at a temperature lower than 15° C. throughout all of the operations carried out subsequently,
c) a flesh is formed which is cleaned by separating the bones and the skin,
d) water is added to the cleaned flesh and the whole is mixed,
e) the mixture is decanted into a liquid phase and a solid phase,
f) the solid phase (flesh) is packaged and deep-frozen,
g) the oil is separated from the liquid phase.
The process according to the invention uses cleaned fish, that is to say, fish from which the viscera and the head have been removed The flesh of the fish is transformed by remaining at a relatively low temperature of the order of a few degrees above zero.
The flesh is then treated in order to separate therefrom the oil and the de-oiled solid materials in which only a very small amount of oil (of the order of 3%) remains. The solid materials are very valuable in the farm-produce industry for cooked seafood dishes. The material is excellently preserved bacteriologically and constitutes a source of very valuable raw materials for the farm-produce industry owing to its low fat content.
According to other advantageous features of the process:
from 10% to 40% of water is added to the cleaned flesh,
the flesh is packaged in bags which are deep-frozen,
the liquid phase is stored in a cold silo,
the liquid phase is separated into oil and sludge by at least one separating pass,
optionally the liquid phase is subjected to two passes in order to separate the sludges and recover the oil which is conditioned by an inertia process and which is stored at low temperature.
The present invention relates also to an installation for implementing such a process, the installation being characterised in that it comprises a flesh press receiving the headless eviscerated fish or filleting waste or fish heads in order to form a mixture from which the flesh press separates the flesh, on the one hand, and the bones and the skin, on the other, a mixer which is provided with a cold water supply and which receives the flesh, a decanter receiving the flesh, to which water from the mixer has been added, in order to separate the charged liquid phase and the de-oiled flesh, a bagging machine and means for deep-freezing the flesh and also a silo for storing the liquid phase and an oil/sludge separator.
The invention relates also to the products obtained by implementing the process or the installation and, in particular, the de-oiled flesh which is intended for applications in farm-produce industries.
The present invention will be described hereinafter in more detail with reference to the single appended Figure explaining the process for extracting fish oil and de-oiled flesh.
REFERENCES:
patent: 3759716 (1973-09-01), Schulman et al.
patent: 44 29 837 (1996-02-01), None
patent: 0 301 795 (1989-02-01), None
patent: 2 244 999 (1991-12-01), None
patent: 46003972 (1971-11-01), None
patent: 59-14776 (1984-01-01), None
patent: WO 87/00733 (1987-02-01), None
patent: WO 91/03950 (1991-04-01), None
Barrier Pascale
Rousseau Jean-Yves
Sea Oil
Seidel Gonda Lavorgna & Monaco, PC
Weier Anthony J.
LandOfFree
Method and plant for extracting fish oil and resulting products does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and plant for extracting fish oil and resulting products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and plant for extracting fish oil and resulting products will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2440731