C - Chemistry – Metallurgy – 09 – F
Patent
C - Chemistry, Metallurgy
09
F
99/165, 99/197
C09F 5/10 (2006.01) C11B 3/00 (2006.01) C11B 3/10 (2006.01)
Patent
CA 1119881
ABSTRACT OF THE DISCLOSURE Triglyceride oils are bleached rapidly and efficiently in a continuous system wherein a stream of the oil is preheated to bleaching temperature and is introduced into a mixing zone in such manner as to provide a swirling motion, bleaching absorbent containing moisture is added to the surface of the swirling hot oil and water vapor or steam derived from the moisture in the absorbent forms a protective atmosphere above the surface of the oil to protect it from oxidation. The oil-absorbent mixture is pumped continuously from the mixer to a bleaching zone consisting of one or more static mixers, which may be unobstructed pipe sections, under flow conditions pro- viding an average residence time of approximately one minute. The flow regime in the bleaching zone may be laminar or turbulent. Optionally, the oil-absorbent mixture may flow continuously from the mixing zone to a vacuum dryer where it is dearated and dried to optimum moisture content for bleaching prior to being pumped to the bleaching zone. Total time through the system may be in the order of less than three minutes. The advantages include simplicity of the operation, savings in time and ease of changing feedstocks.
330592
Mag Theodore K.
Reid Margaret P.
Canada Packers Limited
Ridout & Maybee Llp
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