Patent · US Active

Optimized production of aromatic dicarboxylic acids

US7897810B2 · kind B2 · utility

4Cited by

33References

31Claims

0Family size

Assignee

Eastman Chemical Company · US

Inventors

Robert Lin · Kingsport, US
Marcel de Vreede · Barendrecht, NL

Key dates

Filing date	Mar 18, 2008
Grant date	Mar 1, 2011
Priority date	—
Expiry date	Mar 18, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/00006
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Disclosed is an optimized process and apparatus for more efficiently producing aromatic dicarboxylic acids (e.g., terephthalic acid). In one embodiment the process/apparatus reduces costs by recovering and purifying residual terephthalic acid present in the liquid phase of an initial oxidation slurry. In another embodiment the process apparatus reduces costs associated with hydrogenation by forming a final composite product containing unhydrogenated acid particles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.