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US 12,415,179 B2Granted
Process for recovering and reusing depolymerization catalyst
Assignee9449710 Canada Inc.
InventorsFares Essaddam, Hatem Essaddam, Ramzi Zarrougui
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Abstract
The present disclosure relates to the recovery of an alkoxide catalyst used in a process depolymerizing a polyester to form a diacid or diester and a diol. The present disclosure also relates to the recovery of an alkoxide catalyst used in a process depolymerizing polyethylene terephthalate to form dimethyl terephthalate and mono ethylene glycol.
Claims22
A process for depolymerizing a polyester, wherein the process comprises admixing the polyester with a mixture comprising an alkoxide;
- wherein the alkoxide is recovered from an alkoxide containing mother liquor using a process comprising:
- (i) an adsorption cycle;
- (ii) a wash cycle;
- and
- (iii) a desorption cycle.
2 more elements
A system for recovering an alkoxide from an alkoxide containing mother liquor, the system comprising:
- (i) an alkoxide containing mother liquor;
- (ii) an adsorbent;
- (iii) a wash solvent;
- and
- (iv) a desorption solvent.
2 more elements
Dependencies are inferred from the claim text.