Process for synthesizing a new catalyst complex for the production of polyethylene terephthlate
AssigneeSaudi Basic Industries Corporation
InventorBander Al-Farhood
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Abstract
This invention relates to a process of preparing a catalyst for the production of polyethylene terephthalate and for the production of high molecular weight PET comprising: a) reacting boric acid and a zinc salt in a solvent comprising at least one glycol selected from ethylene glycol, propylene glycol, and butylene glycol thereby forming a precipitate; and b) isolating the precipitate. In addition, the use of the catalyst for the production of polyethylene terephthalate and for the production of high molecular weight PET is disclosed.
Claims15
A process of preparing a catalyst for the production of polyethylene terephthalate comprising:
- reacting boric acid and a zinc salt in a solvent comprising at least one glycol selected from ethylene glycol, propylene glycol, and butylene glycol, thereby forming a precipitate;
- and
- isolating the precipitate.
A process of preparing a catalyst for the production of polyethylene terephthalate comprising:
- forming a boric acid solution of boric acid solved in a solvent comprising at least one glycol selected from ethylene glycol, propylene glycol, and butylene glycol;
- combining the boric acid solution and the zinc salt to form a reaction solution;
- reacting the reaction solution under an inert atmosphere and at a temperature of 100° C. to the boiling temperature of the reaction solution to form a precipitate;
- and
- isolating the precipitate.
A catalyst for the production of polyethylene terephthalate obtainable by a process comprising
- reacting boric acid and a zinc salt in a solvent comprising at least one glycol selected from ethylene glycol, propylene glycol, and butylene glycol, thereby forming a precipitate;
- and
- isolating the precipitate.
A catalyst for the production of polyethylene terephthalate having the chemical composition C4H8O9B2Zn4.
A method of manufacturing polyethylene terephthalate comprising:
- polymerization of terephthalic acid, ethylene glycol and optionally isophthalic acid in the molten state in the presence of a catalyst, wherein the catalyst was obtained by a process comprising
- reacting boric acid and a zinc salt in a solvent comprising at least one glycol selected from ethylene glycol, propylene glycol, and butylene glycol, thereby forming a precipitate;
- and
- isolating the precipitate;
- and
- after reaching an intrinsic viscosity of at least 0.66 dL/g, solidifying the molten polymer and continuing the polymerization in the solid state until an intrinsic viscosity of at least 1.00 is reached.
Dependencies are inferred from the claim text.