Organic compounds -- part of the class 532-570 series – Organic compounds – Fatty compounds having an acid moiety which contains the...
Utility Patent
1999-01-11
2001-01-02
Carr, Deborah D. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Fatty compounds having an acid moiety which contains the...
23
Utility Patent
active
06169191
ABSTRACT:
The invention relates to a method for producing stearin from fat of animal or plant origin, wherein the fat is liquefied by heating it to a temperature at which crystals are no longer present in the liquid, and wherein subsequently stepwise cooling is carried out for the formation of crystals, with crystallized oil being fed into the inlet of a centrifuge equipped with a stack of plates.
The invention relates furthermore to an apparatus for carrying out the above method.
It is known to employ vacuum band filters or filter presses for separating the solid phase (stearin) from the liquid phase. Upon clogging of the filter pores, difficulties arise, in particular when the filter pores cannot be unclogged anymore, even with a vapor treatment.
It is an object of the invention to so provide a method of the above-described type as well as an apparatus for carrying out this method that during the duration of a production run, a sharp separation between the stearin phase and the oil phase is maintained at a constant rate, to achieve an optimum quality of stearin and stearin yield.
This object is solved by carrying out the cooling of the crystallized oil to a temperature in the range of 40° C. and below, but above 10° C., and by introducing the crystallized oil into the inlet of a nozzle-type centrifuge which is not self-emptying and is equipped with a stack of plates and a stationary gripping device for the oil phase; and by guiding the solid phase through flow chambers tapering towards the nozzles, and discharging the solid phase through the nozzles, with the ratio between the feed rate in I/h and the nozzle capacity in I/h being adjusted in the range between 2:1 and 4:1 for realizing a high degree of separation.
Through use of a nozzle-type centrifuge, it is sufficient to cool down the crystallized oil to a temperature in the range of 10° C. to 40° C. before introduced into the inlet of the centrifuge.
The flow chambers tapering towards the nozzles arranged in the circumferential area of the centrifugal drum are bounded by segment inserts which are made of stainless steel. These segment inserts ensure a prescribed conduction of the solid phase from the outer area of the stack of plates to the nozzles, thereby avoiding deposits of solid particles between two neighboring nozzles and also the formation of mixed phases in the solid phase chamber.
Use of the segment inserts results between the stearin phase and the oil phase in a separation which is superior to the one achieved by conventionally utilized technologies.
Additional features of the invention are set forth in the dependent claims.
REFERENCES:
patent: 2807411 (1957-09-01), Ayres
patent: 3111490 (1963-11-01), Halbach
patent: 3341093 (1967-09-01), Putterlik
patent: 3797736 (1974-03-01), G{umlaut over (u)}nnewig
patent: 3902661 (1975-09-01), Meis et al.
patent: 0 088 949 (1983-09-01), None
patent: 973 457 (1964-10-01), None
Dolle Ernst
Wieking Wolfgang
Carr Deborah D.
Feiereisen Henry M.
Westfalia Separator AG
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