The present invention relates to the depolymerization of polymers and the recovery of the starting materials used for the production of the polymer. The present invention also relates to the depolymerization of polyethylene terephthalate (PET) and the recovery of terephthalic acid and ethylene glyco
The present invention relates to the depolymerization of polymers and the recovery of the starting materials used for the production of the polymer. The present invention also relates to the depolymerization of polyethylene terephthalate (PET) and the recovery of terephthalic acid and ethylene glycol.
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1.-20. (canceled) 21. A process for depolymerizing polyethylene terephthalate, comprising admixing the polyethylene terephthalate with a mixture comprising: (i) a non-polar solvent; and(ii) a mixture of an alcohol and a hydroxide; wherein the admixing is continued for a sufficient time to depolymeri
1.-20. (canceled) 21. A process for depolymerizing polyethylene terephthalate, comprising admixing the polyethylene terephthalate with a mixture comprising: (i) a non-polar solvent; and(ii) a mixture of an alcohol and a hydroxide; wherein the admixing is continued for a sufficient time to depolymerize at least a portion of the polyethylene terephthalate; andwherein the process is performed without applying external heat. 22. The process of claim 21, wherein the mixture of the alcohol and the hydroxide is added to the polyethylene terephthalate simultaneously with the non-polar solvent. 23. The process of claim 21, wherein the ratio of the non-polar solvent to alcohol is about 1:10 to about 1:50 (v:v). 24. The process of claim 21, wherein the polyethylene terephthalate is admixed with the non-polar solvent, the hydroxide, and the alcohol for about 0 h to about 5 h. 25. The process of claim 24, wherein the polyethylene terephthalate is admixed with the non-polar solvent, the hydroxide, and the alcohol at atmospheric pressure. 26. The process of claim 21, wherein the non-polar solvent is a halogenated solvent. 27. The process of claim 21, wherein the alcohol is a linear C1-C4 alcohol. 28. The process of claim 21, wherein the hydroxide is selected from a group consisting of an alkali metal hydroxide, an alkaline earth metal hydroxide, an ammonium hydroxide, and a combination thereof. 29. The process of claim 21, wherein the polyethylene terephthalate is in the form of waste material. 30. The process of claim 29, wherein the waste material further comprises debris that do not include polymers comprising an ester functionality. 31. The process of claim 30, wherein the debris comprise at least one of bottle caps, glue, paper, residual liquid, and dirt. 32. The process of claim 21, wherein the polyethylene terephthalate is depolymerized to form terephthalic acid or a salt thereof and ethylene glycol. 33. The process of claim 32, wherein the terephthalic acid or a salt thereof contains less than about 3% impurity (w/w). 34. The process of claim 33, wherein the impurity comprises at least one of isophthalic acid, phthalic acid, 4-methylbenzoic acid, 4-formylbenzoic acid, and metals. 35. A process for depolymerizing polyethylene terephthalate, comprising admixing the polyethylene terephthalate with a mixture comprising: (i) about 3 to about 5% (vol.) of a non-polar solvent, wherein the non-polar solvent is a halogenated solvent;(ii) about 95 to about 97% (vol.) of a linear C1-C4 alcohol; and(iii) a hydroxide;wherein the admixing is continued for about 1 h; andwherein the process is performed without applying external heat. 36. The process of claim 35, wherein the polyethylene terephthalate is depolymerized to form terephthalic acid or salt thereof and ethylene glycol. 37. The process of claim 36, wherein the terephthalic acid or salt thereof contains less than about 3% impurity (w/w). 38. The process of claim 37, wherein the impurity comprises at least one of isophthalic acid, phthalic acid, 4-methylbenzoic acid, 4-formylbenzoic acid, and metals. 39. Terephthalic acid or salt thereof obtained by depolymerizing polyethylene terephthalate using a process comprising admixing the polyethylene terephthalate with a mixture comprising: (i) a non-polar solvent; and(ii) a mixture of an alcohol and a hydroxide; wherein the admixing is continued for a sufficient time to depolymerize at least a portion of the polyethylene terephthalate to form terephthalic acid or salt thereof;wherein the process is performed without applying external heat; andwherein the terephthalic acid or salt thereof comprises isophthalic acid in an amount of less than about 3% (w/w). 40. The terephthalic acid of claim 39, wherein the mixture comprises: (i) about 3 to about 5% (vol.) of a non-polar solvent, wherein the non-polar solvent is a halogenated solvent;(ii) about 95 to about 97% (vol.) of a linear C1-C4 alcohol; and(iii) a hydroxide; wherein the admixing is continued for about 1 h; and wherein the process is performed without applying external heat.
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