Counter current dry fractional crystallization

Details Counter current dry fractional crystallization Counter current dry fractional crystallization

C - Chemistry, Metallurgy

11

B

260/499.5

C11B 1/00 (2006.01) C11B 7/00 (2006.01)

Patent

CA 2017294

The invention relates to a method for dry fractionation of fatty substances by a counter current dry fractionation operation, comprising at least two dry fractional crystallization treatments; - a first dry fractional crystallization treatment comprising the steps of: 1a) dry fractionating by crystallization the fatty substances into a higher melting first stearin fraction and a lower melting first olefin fraction; 1b) separating the first stearin fraction from the first olefin fraction by membrane filter pressing; and 1c) feeding the separated first olefin fraction to a second dry fractional recrystallization treatment; and a second dry fractional crystallization treatment comprising the steps of: 2a) dry fractionating by crystallization the first olefin fraction into a higher malting second stearin fraction and a lower melting second olefin fraction; 2b) separating the second stearin fraction from the second olefin fraction by membrane filter pressing; and 2c) feeding the separated second stearin fraction to the first dry fractional crystallization treatment.

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