Process for making thermoplastic polyesters
AssigneeSaudi Basic Industries Corporation
InventorZahir Bashir
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Abstract
The invention relates to a process for making a thermoplastic polyester, which comprises contacting at least one carboxylic acid-based compound and at least one alcohol-based compound in esterification and subsequent polycondensation reactions, in the presence of certain exfoliated inorganic nano-layered titanates acting as a catalyst.
Claims17
A process for making a thermoplastic polyester, which comprises contacting at least one carboxylic acid-based compound and at least one alcohol-based compound in esterification and subsequent polycondensation reactions, in the presence of an inorganic nano-layered titanate in exfoliated form as a catalyst.
A method of using an inorganic nano-layered titanate, comprising:
- contacting the inorganic nano-layered titanate with reactants in esterification and polycondensation reactions to produce a product, wherein the inorganic nano-layered titanate is in exfoliated form as a catalyst.
A process for making a thermoplastic polyester, which comprises contacting at least one carboxylic acid-based compound and at least one alcohol-based compound in esterification and subsequent polycondensation reactions, in the presence of an inorganic nano-layered titanate in exfoliated form as a catalyst;
- wherein the titanate has a layer charge-density in the range of 2 to 4 nm−2, as determined by the Sasaki method;
- and
- wherein the inorganic nano-layered titanate is at least one member selected from the group consisting of titanates with lepidocrocite structure of formula HxTi2−x/4□x/4O4.H2O wherein x is in the range of 0.5 to 1.2 and □ is a vacancy at a titanium site.
A method of using an inorganic nano-layered titanate, comprising:
- contacting the inorganic nano-layered titanate with reactants in esterification and polycondensation reactions to produce a product, wherein the inorganic nano-layered titanate is in exfoliated form as a catalyst;
- wherein the titanate has a layer charge-density in the range of 2 to 4 nm−2, as determined by the Sasaki method;
- and
- wherein the inorganic nano-layered titanate is at least one member selected from the group consisting of titanates with lepidocrocite structure of formula HxTi2−x/4□x/4O4.H2O wherein x is in the range of 0.5 to 1.2 and □ is a vacancy at a titanium site.
Dependencies are inferred from the claim text.