Double bond hydroisomerization process

C - Chemistry – Metallurgy – 07 – C

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C07C 5/25 (2006.01) C07C 5/23 (2006.01)

Patent

CA 2604486

A process and apparatus are disclosed for hydroisomerizing a mixed C4 olefin stream in a catalytic distillation column in order to increase the concentration of 2-butene and minimize the concentration of 1-butene, while concurrently minimizing the production of butanes. In one embodiment, carbon monoxide is introduced into the double bond hydroisomerization reactor along with hydrogen. In another embodiment, hydrogen, and optionally also carbon monoxide, is introduced at multiple locations along the double bond hydroisomerization reactor. The invention is particularly useful in preparing C4 feed streams for metathesis reactions.

L'invention porte sur un procédé et sur un appareil d'hydroisomérisation d'un courant d'oléfines C4 mélangé dans une colonne de distillation catalytique afin d'augmenter la concentration de 2-butène et minimiser la concentration de 1-butène, tout en minimisant simultanément la production de butanes. Selon un mode de mise en oeuvre, on introduit le monoxyde de carbone dans un réacteur d'hydroisomérisation à double liaison avec de l'hydrogène. Selon un autre mode de mise en oeuvre, on introduit l'hydrogène, et éventuellement le monoxyde de carbone, à plusieurs endroits le long du réacteur d'hydroisomérisation à double liaison. L'invention est notamment utile dans la préparation de courants d'amenée de C4 pour des réactions métathétiques.

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