Method of recycling a plastic

Details Method of recycling a plastic Method of recycling a plastic

C - Chemistry, Metallurgy

08

J

C08J 11/00 (2006.01) C08F 8/50 (2006.01)

Patent

CA 2642617

The present invention provides a method of recycling a plastic thereby forming a narrow spectrum of hydrocarbons having from 4 to 14 carbon atoms that can be directly used as gasoline without additional processing or refining. The method includes the step of feeding the plastic, selected from the group of polyethylene, polypropylene, polystyrene, and combinations thereof, into a heated vessel for melting. The method also includes the step of decomposing the plastic at a temperature of from 400°C to 500°C in the presence of a metallocene catalyst and a zeolitic catalyst thereby forming the hydrocarbons having from 4 to 14 carbon atoms. The metallocene catalyst includes dichlorobis(2-methylindenyl)zirconium (IV). The zeolitic catalyst includes ammonium Y zeolite and has a pore size of from 1 to 4 Angstroms.

la présente invention concerne un procédé de recyclage de matières plastiques permettant de former un spectre étroit d'hydrocarbures comptant de 4 à 14 atomes de carbone qui peuvent être utilisés directement comme essence sans traitement ou raffinage supplémentaires Ce procédé consiste à placer la matière plastique, prise dan le groupe constitué de polyéthylène, de polypropylène, de polystyrène ou d'une combinaison de ces composés dans un récipient chauffé pour les faire fondre. Le procédé consiste également à décomposer la matière plastique à une température comprise entre 400 °C et 500 °C en présence d'un catalyseur métallocène et d'un catalyseur zéolitique et, ce faisant, à former les hydrocarbures comptant de 4 à 14 atomes de carbone. Le catalyseur métallocène comprend du dichlorobis(2-méthylindenyl)zirconium (IV). Le catalyseur zéolitique comprend un zéolite d'ammonium Y et présente des pores d'une taille comprise entre 1 et 4 Angstroms.

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