Purification of carboxylic acids by complexation with selective solvents

Title: 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:: Wytcherley, Randi Wright; Chou, Tai-Li

Issue Date:: 2007-12-11

Research Org.:: GTC Technology, Inc., Houston, TX (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1531544

Patent Number(s):: 7,307,188

Application Number:: 11/102,242

Assignee:: GTC Technology Inc. (Houston, TX)

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.

Copy to clipboard


                    Wytcherley, Randi Wright, & Chou, Tai-Li. Purification of carboxylic acids by complexation with selective solvents.  United States.

Copy to clipboard


                    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.

Copy to clipboard


                    
@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}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Method and apparatus for preparing purified terephthalic acid
patent, November 1998

Lee, Fu-Ming; Lamshing, Wiston
US Patent Document 5,840,968
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5840968

Aromatics separation process and method of retrofitting existing equipment for same
patent, September 2003

Gentry, Joseph C.; Lee, Fu-Ming
US Patent Document 6,616,831
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=6616831

Method and apparatus for preparing purified terephthalic acid and isophthalic acid from mixed xylenes
patent, April 2000

Lee, Fu-Ming; Lamshing, Wiston; Wytcherley, Randi W.
US Patent Document 6,054,610
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=6054610

Method for purifying isophthalic acid prepared from metaxylene
patent, October 2000

Lee, Fu-Ming; Lamshing, Wiston; Wytcherley, Randi W.
US Patent Document 6,140,534
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=6140534

Method of recovering carboxylic acids from dilute solutions
patent, February 1996

Wytcherley, Randi W.; Gentry, Joseph C.; Gualy, Ronald G.
US Patent Document 5,492,625
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5492625

Method and apparatus for preparing purified terephtalic acid
patent, June 1998

Lee, Fu-Ming; Shang, Wei-Teh W.
US Patent Document 5,767,311
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5767311

Direct continuous flow integration of production and purification of high purity iso- or terephthalic acid
patent, June 1987

Schwartz, Michael M.; Stark, Leonard E.
US Patent Document 4,675,438
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=4675438

Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid
patent, July 1999

Lamshing, Wiston; Lee, Fu-Ming; Wytcherley, Randi W.
US Patent Document 5,929,274
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5929274

Aromatics purification from petroleum streams
patent, August 2004

Lee, Fu-Ming
US Patent Document 6,781,026
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=6781026

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
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=9919939

Similar records in DOE Patents and OSTI.GOV collections:

Selective catalytic production of linear alpha olefins from lactones and unsaturated carboxylic acids

Patent Dumesic, James Anthony; Wang, Dong; Hakim, Sikander Hussain; ...

Described is a method to make linear alpha olefins. The method includes the steps of contacting a feedstock having a lactone and/or an unsaturated carboxylic acid with a solid acid catalyst having acidic catalytic sites including Lewis acid catalytic sites, for a time and a temperature wherein at least a fraction of the lactone and/or unsaturated carboxylic acid present in the feedstock is converted into a linear alpha olefin. The method may optionally take place in the presence of water. The solid acid catalyst should preferably have at least 50% Lewis acid catalytic sites.
Full Text Available
Separation of certain carboxylic acids utilizing cation exchange membranes

Patent Chum, Helena L. (Arvada, CO); Sopher, David W. (Maarssenbroek, NL)

A method of substantially separating monofunctional lower carboxylic acids from a liquid mixture containing the acids wherein the pH of the mixture is adjusted to a value in the range of from about 1 to about 5 to form protonated acids. The mixture is heated to an elevated temperature not greater than about 100.degree. C. and brought in contact with one side of a perfluorinated cation exchange membrane having sulfonate or carboxylate groups or mixtures thereof with the mixture containing the protonated acids. A pressure gradient can be established across the membrane with the mixture being under higher pressure, somore »« less
Full Text Available
Process for producing peracids from aliphatic hydroxy carboxylic acids

Patent Chum, Helena L. (Arvada, CO); Ratcliff, Matthew A. (Lakewood, CO); Palasz, Peter D. (Lakewood, CO)

A process for producing peracids from lactic acid-containing solutions derived from biomass processing systems comprising: adjusting the pH of the solution to about 8-9 and removing alkaline residue fractions therefrom to form a solution comprised substantially of lower aliphatic hydroxy acids; oxidizing the solution to produce volatile lower aliphatic aldehydes; removing said aldehydes as they are generated; and converting said aldehydes to peracids.
Full Text Available
Recovery of carboxylic acids from water by precipitation from organic solutions

Patent King, C. Judson (Kensington, CA); Starr, John (Albany, CA)

Carboxylic acids are recovered from wet organic solutions by reducing the solutions' water content thus causing the acids to precipitate as recoverable crystals.
Full Text Available
Preparation of .alpha., .beta.-unsaturated carboxylic acids and anhydrides

Patent Spivey, James Jerry (Cary, NC); Gogate, Makarand Ratnakav (Durham, NC); Zoeller, Joseph Robert (Kingsport, TN); ...

Disclosed is a process for the preparation of .alpha.,.beta.-unsaturated carboxylic acids and anhydrides thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic anhydride in the presence of a catalyst comprising mixed oxides of vanadium, phosphorus and, optionally, a third component selected from titanium, aluminum or, preferably silicon.
Full Text Available

Similar Records

Title: Purification of carboxylic acids by complexation with selective solvents

Abstract

Citation Formats

Method and apparatus for preparing purified terephthalic acid patent, November 1998

Aromatics separation process and method of retrofitting existing equipment for same patent, September 2003

Method and apparatus for preparing purified terephthalic acid and isophthalic acid from mixed xylenes patent, April 2000

Method for purifying isophthalic acid prepared from metaxylene patent, October 2000

Method of recovering carboxylic acids from dilute solutions patent, February 1996

Method and apparatus for preparing purified terephtalic acid patent, June 1998

Direct continuous flow integration of production and purification of high purity iso- or terephthalic acid patent, June 1987

Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid patent, July 1999

Aromatics purification from petroleum streams patent, August 2004

Ozone distribution in a faucet patent, March 2018

Method and apparatus for preparing purified terephthalic acid
patent, November 1998

Aromatics separation process and method of retrofitting existing equipment for same
patent, September 2003

Method and apparatus for preparing purified terephthalic acid and isophthalic acid from mixed xylenes
patent, April 2000

Method for purifying isophthalic acid prepared from metaxylene
patent, October 2000

Method of recovering carboxylic acids from dilute solutions
patent, February 1996

Method and apparatus for preparing purified terephtalic acid
patent, June 1998

Direct continuous flow integration of production and purification of high purity iso- or terephthalic acid
patent, June 1987

Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid
patent, July 1999

Aromatics purification from petroleum streams
patent, August 2004

Ozone distribution in a faucet
patent, March 2018