Method of recovering chemical species by depolymerization of poly (ethylene terephthalate) and related use
OwnerMassimo Broccatelliinventor
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Abstract
The present invention relates to a method of recovering a solution comprising the chemical species obtained by depolymerization of PET from a material containing poly(ethylene terephthalate) in the form of bottles, by making said material react, in the absence of water, with a reagent consisting of one or more metal salts of a weaker acid than the terephthalic acid and of ethylene glycol, until a water-soluble intermediate product is obtained, and subsequently carrying out dissolution in water, stirring and filtering.
Claims21
A method of recovering terephthalates from a non-water soluble material containing poly(ethylene terephthalate) (PET), comprising;
- mixing, in the absence of water said non-water soluble material containing poly(ethylene terephthalate), ethylene glycol and one or more water-soluble salts of acids weaker than terephthalic acid but stronger than water, until a plurality of water soluble polymeric fragments, wherein said polymeric fragments are from the poly(ethylene terephthalate);
- and
- mixing water with the water soluble polymeric fragments to provide a solution including said polymeric fragments mixed with water.
Dependencies are inferred from the claim text.