Use of a catalyst composition for the catalytic depolymerization of plastics waste
AssigneeSolvay SA
InventorsStéphane Streiff, Marco Piccinini, Armin T. Liebens, Avelino Corma, Miriam Cerro-Alarcón, Jesús Mengual
Life of this patent
Estimating the term…
Abstract
Use of a catalytic composition parameters comprising oxides of aluminum or oxidic compounds comprising aluminum and silicon with a molar ratio of aluminum to silicon of more than 1 in a process for the catalytic depolymerization of plastics waste.
Claims13
A process comprising catalytically de-polymerizing plastics waste in the presence of a catalytic composition comprising oxidic compounds comprising aluminum and silicon with a molar ratio of aluminum to silicon of more than 1, wherein the catalytic composition comprises from 50 to 100 wt %, based on the weight of the composition, of at least one catalytically active amorphous aluminum oxide component which is aluminosilicate and from 0 to 50 wt %, based on the weight of the composition, of a crystalline catalytically active component containing at least one microporous aluminosilicate.
A process for the catalytic de-polymerization of plastic waste, the process comprising:
- a) introducing plastics waste into a reactor, melting the plastics waste, and thereafter increasing the temperature to a temperature in the range of from 350 to 600° C.,
- b) adding a catalytic composition comprising oxidic compounds comprising aluminium and silicon with a molar ratio of aluminium to silicon of more than 1 to the molten plastics, wherein the catalytic composition comprises from 50 to 100 wt %, based on the weight of the composition, of at least one catalytically active amorphous metal oxide component which is aluminosilicate and from 0 to 50 wt %, based on the weight of the composition, of a crystalline catalytically active component containing at least one microporous aluminosilicate,
- c) carrying out the catalytic depolymerization at a temperature of from 350 to 600° C., and
- d) recovering the product fractions produced.
Dependencies are inferred from the claim text.