Purification of carboxylic acids by complexation with selective solvents

Wytcherley, Randi Wright; Chou, Tai-Li

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):: 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

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C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C63/24 - 1,3 - Benzenedicarboxylic acid
C07C51/487 - by treatment giving rise to chemical modification
C07C51/285 - with peroxy-compounds
C07C63/26 - 1,4 - Benzenedicarboxylic acid
C07C51/43 - by change of the physical state, e.g. crystallisation

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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.

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

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                    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.

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@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 referenced in this record:

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patent, November 1998

Lee, Fu-Ming; Lamshing, Wiston
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Oxidation Process for Preparation of Terephthalic Acid
patent, April 1953

Burrows, Lawton Arthur; Cavanaugh, Robert Morris; Nagle, Wesley Michael
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Method and apparatus for preparing purified terephthalic acid and isophthalic acid from mixed xylenes
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patent, August 1960

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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
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patent, August 2004

Lee, Fu-Ming
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Ham, George E.
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Baldwin, Richard H.; Spiller, Charles A.
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Works referencing / citing this record:

Ozone distribution in a faucet
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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

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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

Process for the production of purified terephthalic acid patent-application, December 2002

Oxidation Process for Preparation of Terephthalic Acid patent, April 1953

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 of Purifying Aromatic Dicarboxylic Acids patent, August 1960

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

Aromatics purification from petroleum streams patent, August 2004

Method for Purifying Aromatic Dicarboxylic Acids patent, August 1953

Recovery of Phthalic Acid Products patent, March 1963

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

Process for the production of purified terephthalic acid
patent-application, December 2002

Oxidation Process for Preparation of Terephthalic Acid
patent, April 1953

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 of Purifying Aromatic Dicarboxylic Acids
patent, August 1960

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

Aromatics purification from petroleum streams
patent, August 2004

Method for Purifying Aromatic Dicarboxylic Acids
patent, August 1953

Recovery of Phthalic Acid Products
patent, March 1963

Ozone distribution in a faucet
patent, March 2018