To make possible to largely save labors and obtain oils and fats stabilized in qualities, because a filter press process can be adopted without sacrificing the yields of high melting point fractions by preliminarily cooling oils and fats and subsequently pouring the oils and the fats into crystallizing trays by a specific method.
Oils and fats as raw materials to be crystallized in a stationary state are preliminarily cooled preferably at a lower temperature by 1°C or larger than a stationary crystallization temperature (the temperature of a cooling medium), divided into small divisions in a large vessel, poured into many crystallization trays disposed in parallel to each other, crystallized in a stationary crystallization state and finally subjected to a solid-liquid separation treatment. Concretely, for example, a large volume vessel 1 in which a plurality of small communicating chambers vertically divided with division plates in a constant height from the bottom and having openings enabling the pouring of the oils and the fats at the upper ends of the chambers are disposed is used. The oils and the fats as the raw materials are introduced into the large volume vessel 1 from an opening 3 for supplying the liquid to be poured. The small chambers are uniformly filled with the oils and fats to divide the oils and the fats into the small portions. Subsequently, the oils and the fats are simultaneously poured into parallel crystallization trays through oil-pouring pipes 5 connected to the bottom portions of the small chambers.
Higuchi, Kiyoyuki
Taniguchi, Atsushi
Kuwabara, Yuji
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