Purification of carboxylic acids by complexation with selective solvents
Abstract
A method and apparatus for purifying carboxylic acids is disclosed. A mixture containing crude carboxylic acid is contacted with a selective crystallization solvent to form a slurry of a salt complex of the carboxylic acid and the selective crystallization solvent. The salt complex is recovered and optionally processed to recover the free carboxylic acid. The method and apparatus of the invention is particularly suitable for purifying aromatic dicarboxylic acids such as terephthalic acid. The present invention also reduces contamination by carboxybenaldehyde isomers in crude phthalic acids by oxidizing the carboxybenzaldehyde to the corresponding phthalic acid.
- Inventors:
- Issue Date:
- Research Org.:
- GTC Technology, Inc., Houston, TX (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1531544
- Patent Number(s):
- 7307188
- Application Number:
- 11/102,242
- Assignee:
- GTC Technology Inc. (Houston, TX)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS
- DOE Contract Number:
- FC36-011D14085
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2005-04-08
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Wytcherley, Randi Wright, and Chou, Tai-Li. Purification of carboxylic acids by complexation with selective solvents. United States: N. p., 2007.
Web.
Wytcherley, Randi Wright, & Chou, Tai-Li. Purification of carboxylic acids by complexation with selective solvents. United States.
Wytcherley, Randi Wright, and Chou, Tai-Li. Tue .
"Purification of carboxylic acids by complexation with selective solvents". United States. https://www.osti.gov/servlets/purl/1531544.
@article{osti_1531544,
title = {Purification of carboxylic acids by complexation with selective solvents},
author = {Wytcherley, Randi Wright and Chou, Tai-Li},
abstractNote = {A method and apparatus for purifying carboxylic acids is disclosed. A mixture containing crude carboxylic acid is contacted with a selective crystallization solvent to form a slurry of a salt complex of the carboxylic acid and the selective crystallization solvent. The salt complex is recovered and optionally processed to recover the free carboxylic acid. The method and apparatus of the invention is particularly suitable for purifying aromatic dicarboxylic acids such as terephthalic acid. The present invention also reduces contamination by carboxybenaldehyde isomers in crude phthalic acids by oxidizing the carboxybenzaldehyde to the corresponding phthalic acid.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {12}
}
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Works referencing / citing this record:
Ozone distribution in a faucet
patent, March 2018
- Rosko, Michael Scot; Jonte, Patrick B.; DeVries, Adam M.
- US Patent Document 9,919,939