Distillation process to separate mixtures containing three...

Details Distillation process to separate mixtures containing three... Distillation process to separate mixtures containing three...

B - Operations, Transporting

01

D

B01D 3/32 (2006.01) B01D 3/14 (2006.01) F25J 3/02 (2006.01) F25J 3/04 (2006.01)

Patent

CA 2251436

A technique is set forth to reduce the heat requirement of conventional distillation processes which separate feed mixtures containing three or more components. The technique provides a great deal of flexibility in adjusting the temperatures of the required utilities including a scenario where the heat requirement is reduced without a need for additional higher temperature (and more costly) heat utility. In this technique, when a liquid bottoms stream (or gaseous overhead stream) containing two or more components is sent from an earlier column to a subsequent column, then a return vapor (or liquid) stream is implemented between the same locations in the two columns.

L'invention porte sur une technique de réduction des besoins thermiques de procédés classiques de distillation qui servent à séparer des mélanges comprenant trois composants ou plus. La technique qui confère une grande souplesse pour ce qui est de régler les températures des corps de chauffe requis, comprend notamment un scénario selon lequel les exigences thermiques sont réduites sans qu'il faille recourir à un corps de chauffe additionnel à température plus élevée (plus coûteux). Selon cette technique, lorsqu'un flux liquide de fond de colonne de distillation (ou un flux gazeux de tête de colonne) contenant deux ou plusieurs composants provenant d'une colonne précédente est envoyé à une colonne suivante, il se produit alors un reflux à l'état de vapeur (ou de liquide) entre les mêmes points dans les deux colonnes.

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