Low capital implementation of distributed distillation in...

B - Operations – Transporting – 01 – D

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B01D 3/14 (2006.01) B01D 3/32 (2006.01) C07C 7/04 (2006.01)

Patent

CA 2516773

An apparatus for recovering ethylene from a hydrocarbon feed stream, where the apparatus is a single distillation column pressure shell encasing an upper region and a lower region. The upper region houses an ethylene distributor rectifying section and the lower region houses a C2 distributor section and an ethylene distributor stripping section. Vapor passes from the lower region into the upper region, and liquid passes from the upper region to the lower region. The process for recovering the ethylene is also disclosed. The hydrocarbon feed stream is introduced into the C2 distributor section, and after a series of stripping and refluxing steps, distinct hydrocarbon products are recovered from the C2 distributor section, the ethylene distributor stripping section, and the ethylene distributor rectifying section, respectively.

L'invention concerne un appareil permettant de récupérer de l'éthylène à partir d'un flux d'alimentation d'hydrocarbures, ledit appareil étant constitué d'une coque sous pression à colonne de distillation unique renfermant une région supérieure et une région inférieure. La région supérieure comprend une section de rectification distributrice d'éthylène, et la région inférieure comprend une section distributrice de C2 et une section de revaporisation distributrice d'éthylène. De la vapeur passe de la région inférieure dans la région supérieure, et un liquide passe de la région inférieure dans la région supérieure et inversement. L'invention concerne également un procédé de récupération d'éthylène. Le flux d'alimentation d'hydrocarbures est introduit dans la section distributrice de C2, et après une série d'étapes de revaporisation et de reflux, des produits d'hydrocarbures distincts sont récupérés respectivement à partir de la section distributrice de C2, de la section de revaporisation distributrice d'éthylène, et de la section de rectification distributrice d'éthylène.

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