A process for the conversion of mixed plastic waste

Details A process for the conversion of mixed plastic waste A process for the conversion of mixed plastic waste

B - Operations, Transporting

29

B

B29B 17/00 (2006.01) C08J 11/12 (2006.01)

Patent

CA 2313012

The invention relates to the conversion of a mixed plastic waste by means of mechanical treatment of the starting material mixture in the presence of a mineral oil. The essence of the invention consists therein that a crushed plastic waste mixture containing about 20 % by weight of low density polyethylene with a softening point below 150 ~C is heat-treated in an oily medium in an apparatus exerting intense kneading-moulding effect at a temperature between 150 ~C and 250 ~C under vigorous stirring until the formation of a quasi-homogenous, liquid-phase or meltphase bitumen-like material , then separating the bitumen-like material obtained.

L'invention concerne la conversion de déchets de plastique mélangés au moyen d'un traitement mécanique du mélange de matériaux de base en présence d'une huile minérale. L'invention est caractérisée par les opérations suivantes: on soumet un mélange de déchets de plastique concassé contenant environ 20 % en poids de polyéthylène de faible densité, dont la température de ramollissement se situe en dessous de 150 ·C, à un traitement thermique dans un milieu huileux, dans un dispositif exerçant un malaxage-moulage intensif, à une température comprise entre 150 et 250 ·C, sous l'action d'un brassage vigoureux, jusqu'à formation d'un matériau sensiblement homogène de type bitume en phase liquide ou en phase de fusion, puis on extrait le matériau bitumineux ainsi obtenu.

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