Loop reactor with varying diameter for olefin polymerization

Details Loop reactor with varying diameter for olefin polymerization Loop reactor with varying diameter for olefin polymerization

B - Operations, Transporting

01

J

B01J 19/18 (2006.01) C08F 2/01 (2006.01)

Patent

CA 2538900

Process for polymerizing at least one olefinic monomer in a loop reactor at from 20 to 150~C, but below the melting point of the polymer to be formed, and a pressure of from 5 to 100 bar, where the polymer formed is present in a suspension in a liquid or supercritical suspension medium and this suspension is circulated by means of an axial pump, wherein the loop reactor comprises a cyclic reactor tube whose diameter varies by at least 10%, based on the predominant reactor tube diameter, and in which there is at least one widening and narrowing in a region other than that of the axial pump.

L'invention concerne un procédé permettant de polymériser au moins un monomère oléfinique dans un réacteur boucle à une température comprise entre 20 et 150 ·C mais en-dessous de celle du point de fusion du polymère à former, et à une pression comprise entre 5 et 100 bars. Le polymère formé est présent dans une suspension dans un milieu de suspensions liquides ou supercritiques et cette suspension circule au moyen d'une pompe axiale. Le réacteur boucle comprend un tube de réacteur cyclique dont le diamètre varie d'au moins 10 %, en fonction du diamètre prédominant d'un tube réacteur, dans lequel au moins un élargissement ou un rétrécissement se produit dans une région autre que celle de la pompe axiale.

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