(19)
(11) EP 0 761 807 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.12.1997 Bulletin 1997/49

(43) Date of publication A2:
12.03.1997 Bulletin 1997/11

(21) Application number: 96114524.0

(22) Date of filing: 11.09.1996
(51) International Patent Classification (IPC)6: C11B 3/14
(84) Designated Contracting States:
DE ES FR IT

(30) Priority: 12.09.1995 US 527179

(71) Applicant: PRAXAIR TECHNOLOGY, INC.
Danbury, CT 06810-5113 (US)

(72) Inventor:
  • Cheng, Alan T.Y.
    Livington, New Jersey 07039 (US)

(74) Representative: Schwan, Gerhard, Dipl.-Ing. 
Elfenstrasse 32
81739 München
81739 München (DE)

   


(54) Pulsation flow to optimize nitrogen consumption


(57) The present invention comprises a process for reducing the quantity of inert gas required to deodorize crude edible oil in a deodorizer, facilitated by intermittently supplying an inert gas, to produce edible quality oil.
In a preferred embodiment, the amount of inert stripping gas required for deodorization is minimized, while still accomplishing both the operation of gas lift umbrella trays in the stripping section of the deodorizer and effective removal of impurities from the edible oil.






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