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US 12,071,520 B2Granted
Terephthalic acid esters formation
Assignee9449710 Canada Inc.
InventorsAdel Essaddam, Fares Essaddam
Life of this patent
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Abstract
The present disclosure relates to the formation of dimethyl terephthalate (DMT). The present invention also relates to the depolymerization of polyethylene terephthalate (PET) and the recovery of dimethyl terephthalate (DMT).
Claims18
A process for depolymerization of a polyester to form a terephthalate;
- the process comprising admixing the polyester, a glycoxide, and at least one solvent comprising methanol.
A process for preparing a mono sodium glycoxide suspension;
- the process comprising:
- a) heating mono ethylene glycol;
- b) adding sodium hydroxide thereby forming mono sodium glycoxide;
- c) drying the mono sodium glycoxide;
- d) suspending the dried mono sodium glycoxide into a suspending solvent;
- and
- e) aging the suspension.
4 more elements
Dependencies are inferred from the claim text.