Method for manufacture of polyesters with recycle content
AssigneeEastman Chemical Company
InventorsEarl Edmondson Howell, JR., Michael Paul Ekart, Travis Wynn Keever, Bob N. Jack, Jonathan Michael Horton, Daniel Lee Martin
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Abstract
A method for manufacture of polyesters with recycle content is described in various aspects. The methods of the present disclosure effectively and cost-efficiently incorporates recycled DMT into existing TPA-based polyester manufacturing systems. Recycle feed compositions for manufacture of polyesters with recycle content and recycled content polyesters are also described.
Claims19
A method for manufacture of polyesters with recycle content, said method comprising the steps of feeding to at least one reaction zone recycle feed comprising an ester recycle material selected from the group consisting of r-DMT, transesterified r-DMT and combinations thereof to form a reaction mixture comprising recycled content in said at least one reaction zone;
- reacting said reaction mixture to form a polyester oligomer mixture with recycled content;
- and polycondensing said recycle content oligomer mixture to form a polyester with recycle content, and wherein said recycle feed further comprises dimethyl isophthalate recycle material (r-DMI).
A recycle feed composition for manufacture of polyesters with recycle content, said recycle feed comprising:
- ester recycle material selected from the group consisting of r-DMT, transesterified r-DMT and combinations thereof;
- and at least one of
- dimethyl isophthalate recycle material (r-DMI);
- and
- residual catalyst material selected from the group consisting of germanium materials and antimony materials and combinations thereof.
Dependencies are inferred from the claim text.