Method for producing glycolide
AssigneeKureha Corporation
InventorsTakenori TOSE, Yoshinori SUZUKI, Toshihiko ONO
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Abstract
To realize a method for producing glycolide that suppresses generation of by-products while productivity of glycolide is improved. A method for producing glycolide, the method including: a first step of preparing a depolymerization reaction solution containing a glycolic acid oligomer and a titanium catalyst selected from the group consisting of organic titanium catalysts and inorganic titanium catalysts, and a second step of producing glycolide by depolymerization of the glycolic acid oligomer, a content of titanium element derived from the titanium catalyst in the depolymerization reaction solution being 1.2 mmol/L or less.
Claims7
A method for producing glycolide, the method comprising:
- a first step of preparing a depolymerization reaction solution containing a glycolic acid oligomer, and a titanium alkoxide catalyst;
- and
- a second step of producing glycolide by depolymerization of the glycolic acid oligomer,
- a content of titanium element derived from the titanium alkoxide catalyst in the depolymerization reaction solution being 1.2 mmol/L or less.
5-6. (canceled)
Dependencies are inferred from the claim text.