Flakes of ester mixtures and methods for their production
AssigneePerPETual GLOBAL TECHNOLOGIES LIMITED
InventorShankar Devraj
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Abstract
There is provided flakes of an ester mixture comprising bis-(hydroxyethyl)-terephthalate, dimers, tamers, tetramers, pentamers and higher oligomers of ethane-1,2-diol and terephthalate acid.
Claims24
A method for producing flakes of an ester mixture comprising bis-(hydroxyethyl)-terephthalate, dimers, trimers, tetramers, pentamers and higher oligomers of ethane-1,2-diol and terephthalate acid, the method comprising the steps of:
- a) flash evaporating ethane-1,2-diol from an ester mixture obtained from the glycolysis of PET (polyethylene terephthalate);
- and
- b) producing flakes of the ester mixture of step (a), wherein the flakes are crystalline, free-flowing non-sticky, stable, storable and reusable.
A method for producing PET products from an ester mixture comprising bis-(hydroxyethyl)-terephthalate, dimers, trimers, tetramers, pentamers and higher oligomers of ethane-1,2-diol and terephthalate acid, the method comprising the steps of:
- a) flash evaporating ethane-1,2-diol from an ester mixture obtained from the glycolysis of PET;
- and
- b) polymerising the ester mixture from step (a) ready to produce PET products.
Flakes of an ester mixture comprising bis-(hydroxyethyl)-terephthalate, dimers, trimers, tetramers, pentamers and higher oligomers of ethane-1,2-diol and terephthalate acid, wherein the flakes are crystalline, free-flowing non-sticky, stable, storable and reusable.
Dependencies are inferred from the claim text.