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 ↗A process for removing metal species from a composition comprising contacting: a. an oligomer mixture stream comprising the monomers of a partially aromatic polyester polymer and at least one metal species, or b. a molten polyester polymer stream comprising partially aromatic polyester polymers and at least one metal species, with a non-catalytic porous material in the presence of hydrogen to produce a treated stream containing a reduced amount of at least one metal species. There are provided compositions comprising a partially aromatic polyester polymer having an It.V. of at least 0.50 produced in a direct esterification melt phase process, from greater than 0 to less than 50 ppm antimony, and less than 40 ppm cobalt, or produced in an ester exchange melt phase process, having from greater than zero to less than 5 ppm titanium and less than 10 ppm manganese.
1. A polyester composition in the form of cut particles, comprising:
a partially aromatic polymer 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, cutting the composition into cut particles, and subsequently crystallizing by latent heat within the cut particles;
about 0 ppm titanium;
from greater than 0 to less than 30 ppm antimony;
less than 5 ppm germanium; and
from 11.0 ppm to less than 40 ppm cobalt, and
having a degree of crystallinity of at least 25%.
2. The composition of claim 1 , further comprising:
less than 20 ppm zinc;
less than 20 ppm manganese;
less than 20 ppm calcium; and
less than 20 ppm magnesium.
3. The composition of claim 1 , comprising:
from 0 ppm to less than 20 ppm zinc.
4. The composition of claim 1 , comprising:
from 0 ppm to less than 20 ppm manganese.
5. The composition of claim 1 , comprising:
from 0 ppm to less than 20 ppm calcium.
6. The composition of claim 1 , comprising:
from 0 ppm to less than 20 ppm magnesium.
7. The composition of claim 1 , comprising:
from greater than 0 ppm to less than 20 ppm zinc.
8. The composition of claim 1 , comprising:
from greater than 0 ppm to less than 20 ppm manganese.
9. The composition of claim 7 , comprising:
from greater than 0 ppm to less than 20 ppm manganese.
10. The composition of claim 1 , comprising:
from greater than 0 ppm to less than 20 ppm calcium.
11. The composition of claim 7 , comprising:
from greater than 0 ppm to less than 20 ppm calcium.
12. The composition of claim 9 , comprising:
from greater than 0 ppm to less than 20 ppm calcium.
13. The composition of claim 1 , comprising:
from greater than 0 ppm to less than 20ppm magnesium.
14. The composition of claim 7 , comprising:
from greater than 0ppm to less than 20 ppm magnesium.
15. The composition of claim 9 , comprising:
from greater than 0 ppm to less than 20 ppm magnesium.
16. The composition of claim 12 , comprising:
from greater than 0 ppm to less than 20 ppm magnesium.
17. The composition of claim 1 , comprising:
less than 25 ppm Co.
18. The composition of claim 1 , having a degree of crystallinity of at least 30%.
19. The composition of claim 1 , having a degree of crystallinity of at least 35%.
20. The composition of claim 1 , having a degree of crystallinity of at least 40%.
21. The composition of claim 1 , comprising:
less than 7 ppm manganese.
22. The composition of claim 1 , comprising:
less than 5 ppm manganese
23. The composition of claim 2 , comprising:
less than 7 ppm manganese.
24. The composition of claim 3 , comprising:
less than 7 ppm manganese.
25. The composition of claim 1 , wherein the partially aromatic polymer comprises a carboxylic acid component comprising at least 80 mole % of terephthalate, 2,6-naphthalate, or mixtures thereof, based on 100 mole percent of carboxylic acid component residues in the partially aromatic polymer.
26. The composition of claim 1 , wherein the partially aromatic polymer comprises a hydroxyl component comprising at least 60 mole % of ethylene glycol or propane diol, based on 100 mole percent of hydroxyl component residues in the partially aromatic polymer.
27. The composition of claim 17 , wherein the partially aromatic polymer comprises a hydroxyl component comprising at least 60 mole % of ethylene glycol or propane diol, based on 100 mole percent of hydroxyl component residues in the partially aromatic polymer.