Process for removing metal species in the presence of hydrogen and a porous material and polyester polymer containing reduced amounts of metal species
View Patent ↗Provided is a composition with partially aromatic polyester polymers having an It.V. of at least 0.50 dL/g, produced in an ester exchange melt phase process, having from zero or greater than zero to less than 5 ppm titanium, from zero or greater than zero to less then 10 ppm germanium, and from zero or greater than zero to less than 20 ppm manganese.
1. A polyester composition, consisting of:
a partially aromatic polyester polymer comprising a repeating unit of alkylene terephthalate or alkylene naphthalate, having an It.V. of at least 0.50 dL/g produced in an ester exchange melt phase process;
from 2.5 to 40 ppm cobalt;
about 0 ppm titanium;
less than 10 ppm germanium; and
less than 10 ppm manganese.
2. The composition of claim 1 , obtained by cutting the composition into cut particles and subsequently crystallizing by the latent heat within the cut particles.
3. The composition of claim 2 , wherein a degree of crystallinity of the cut particles is at least 25%.
4. The composition of claim 3 , wherein the polymer is an amorphous solid having an It.V. of greater than 0.72 dL/g obtained without solid state polymerization.
5. The composition of claim 1 , wherein the composition is a partially crystallized solid having a degree of crystallinity of at least 25% and an It.V. of at least 0.70 dL/g obtained without solid state polymerization.
6. The composition of claim 1 , wherein the composition is a solid.
7. The composition of claim 5 , wherein the polymer has an It.V. of greater than 0.72 dL/g obtained without solid state polymerization.
8. The composition of claim 1 , wherein the partially aromatic polyester polymer comprises a repeating unit of alkylene terephthalate.
9. The composition of claim 1 , wherein the partially aromatic polyester polymer comprises a repeating unit of alkylene naphthalate.
10. A polyester composition, consisting of:
a partially aromatic polymer, in the form of an amorphous solid, comprising repeating units of alkylene terephthalate or alkylene naphthalate, having an It.V. of greater than 0.72 dL/g, produced in a direct esterification melt phase process without solid state polymerization;
from greater than 0 to less than 30 ppm antimony; and
less than 5 ppm germanium.
11. The composition of claim 1 , wherein the cobalt is present in an amount of from 2.5 to 13.4 ppm.
12. A polyester composition, consisting of:
a partially aromatic polyester polymer comprising a repeating unit of alkylene terephthalate or alkylene naphthalate, having an It.V. of at least 0.50 dL/g produced in an ester exchange melt phase process;
from 2.5 to 40 ppm cobalt; and
no titanium, germanium or manganese.