Method of inhibiting polymerization giving copolymer of...

C - Chemistry – Metallurgy – 07 – B

Patent

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C07B 63/04 (2006.01) C07C 7/20 (2006.01) C07C 15/44 (2006.01) C07C 15/46 (2006.01)

Patent

CA 2587607

[PROBLEMS] To provide: a method by which the generation of a copolymer of an aromatic vinyl compound and either the divinylbenzene generated in the production of the aromatic vinyl compound or the divinylbenzene which has come into the system together with a raw material for the aromatic vinyl compound is inhibited in the steps of distilling, purifying, and storing the aromatic vinyl compound; and a method of inhibiting the copolymer from depositing on and thus fouling devices/facilities. [MEANS FOR SOLVING PROBLEMS] The method of inhibiting the generation of a copolymer of divinylbenzene and an aromatic vinyl compound is characterized in that a dinitrophenol compound (A), a sulfonic acid compound (B), and a p-phenylenediamine compound are simultaneously used in the steps of producing, purifying and storing the aromatic vinyl compound.

Le problème à résoudre dans le cadre de cette invention est que l~on souhaite obtenir un procédé permettant de stopper, lors des étapes de distillation, purification et stockage d~un composé vinylique aromatique, la génération d~un copolymère dudit composé vinylique aromatique et de divinylbenzène, ce dernier étant soit généré lors de la production du composé vinylique aromatique, soit introduit dans le système avec une matière première destinée à former le composé vinylique aromatique. On souhaite également obtenir un procédé visant à empêcher le copolymère de se déposer sur les dispositifs ou installations, qu~il pollue ce faisant. La solution consiste en un procédé d~inhibition de la génération d~un copolymère du divinylbenzène et d~un composé vinylique aromatique caractérisé en ce qu~un composé du dinitrophénol (A), un composé d~acide sulfonique (B) et un composé de p-phénylènediamine sont simultanément utilisés lors des étapes de production, purification et stockage du composé vinylique aromatique.

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