Composition of plastic material and process for treating plastic materials for forming said composition
AssigneesENI S.p.A., Versalis S.P.A.
InventorsFrancesco SCAVELLO, Nicola VECCHINI, Riccardo FELISARI, Armando GALEOTTI, Daniele BALDUCCI, Stefania GUIDETTI, Erica MONTANARI
Life of this patent
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Abstract
A plastic composition includes plastic material free from halogenated components or with a halogen content less than or equal to 0.5% by mass with respect to the plastic material, oligomers derived from the plastic contained in the plastic material, halogenated salts, and hydrocarbon.
Claims43
A composition of plastic material which comprises:
- plastic material free from halogenated components or with a halogen content less than or equal to 0.5% by mass with respect to the plastic material,
- oligomers derived from the plastic contained in said plastic material,
- halogenated salts, and
- hydrocarbons.
A process for producing a composition of plastic material mixed with hydrocarbons, oligomers derived from said plastic material, and halogenated salts, capable of treating plastic materials or mixtures of plastic materials, including recycled ones, containing halogenated components, which includes the following step:
- heating and mixing at the same time or in separate stages, in one or more devices which include devices for heating and mixing, a plastic material, including a recycled one, containing halogenated components, an inerting agent and a hydrocarbon stream, thus forming a composition, bringing said composition at a temperature comprised between 150° C. and 450° C. and keeping the composition thus obtained within said temperature range for a time comprised between 10 seconds and 30 minutes, thus forming a final composition;
- said process being characterized in that the inerting agent is added during the process in such an amount that the ratio between the sum of the moles of the alkali metals belonging to group IA and the sum of the moles of halogen contained in the plastic material is at most 20:1.
Dependencies are inferred from the claim text.