GB1429556A - Method for purifying 2,6-naphthalenedicarboxylic acid - Google Patents

Method for purifying 2,6-naphthalenedicarboxylic acid

Info

Publication number
GB1429556A
GB1429556A GB2588973A GB2588973A GB1429556A GB 1429556 A GB1429556 A GB 1429556A GB 2588973 A GB2588973 A GB 2588973A GB 2588973 A GB2588973 A GB 2588973A GB 1429556 A GB1429556 A GB 1429556A
Authority
GB
United Kingdom
Prior art keywords
naphthalenedicarboxylic acid
aqueous solution
naphthalene dicarboxylic
dicarboxylic acid
purifying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2588973A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Teijin Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Teijin Ltd filed Critical Teijin Ltd
Priority to GB2588973A priority Critical patent/GB1429556A/en
Publication of GB1429556A publication Critical patent/GB1429556A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
    • C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1429556 Purification of 2,6-naphthalene dicarboxylic acid TEIJIN Ltd 30 May 1973 25889/73 Heading C2C Crude 2,6-naphthalene dicarboxylic acid obtained by the oxidation of 2,6-dialkylnaphthalene is purified by a process comprising the steps of (a) preparing an aqueous solution of a dibasic salt of said crude 2,6-naphthalenedicarboxylic acid (by precipitating 40-97 mol. per cent of the dibasic 2,6-naphthalenedicarboxylate dissolved in said aqueous solution substantially as a monobasic salt of the 2,6-naphthalenedicarboxylic acid while maintaining the pH of said aqueous solution at a value not lower than 6À3, and separating the precipitate, and (c) converting the separated precipitate to a 2,6-naphthalene dicarboxylic acid.
GB2588973A 1973-05-30 1973-05-30 Method for purifying 2,6-naphthalenedicarboxylic acid Expired GB1429556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2588973A GB1429556A (en) 1973-05-30 1973-05-30 Method for purifying 2,6-naphthalenedicarboxylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2588973A GB1429556A (en) 1973-05-30 1973-05-30 Method for purifying 2,6-naphthalenedicarboxylic acid

Publications (1)

Publication Number Publication Date
GB1429556A true GB1429556A (en) 1976-03-24

Family

ID=10235017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2588973A Expired GB1429556A (en) 1973-05-30 1973-05-30 Method for purifying 2,6-naphthalenedicarboxylic acid

Country Status (1)

Country Link
GB (1) GB1429556A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794195A (en) * 1986-03-14 1988-12-27 Kureha Kagaku Kogyo Kabushiki Kaisha Process for producing 2,6-naphthalenedicarboxylic acid by oxidizing 2,6-diisopropylnaphthalene
WO1998052900A1 (en) * 1997-05-19 1998-11-26 Bp Amoco Corporation Process for preparing purified aromatic polycarboxylic acids
WO2001016079A2 (en) * 1999-08-30 2001-03-08 Mossi & Ghisolfi Overseas S.A. A process for separation of the dipotassium salt of naphthalene dicarboxylic acid using activated carbon beds

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794195A (en) * 1986-03-14 1988-12-27 Kureha Kagaku Kogyo Kabushiki Kaisha Process for producing 2,6-naphthalenedicarboxylic acid by oxidizing 2,6-diisopropylnaphthalene
WO1998052900A1 (en) * 1997-05-19 1998-11-26 Bp Amoco Corporation Process for preparing purified aromatic polycarboxylic acids
WO2001016079A2 (en) * 1999-08-30 2001-03-08 Mossi & Ghisolfi Overseas S.A. A process for separation of the dipotassium salt of naphthalene dicarboxylic acid using activated carbon beds
WO2001016079A3 (en) * 1999-08-30 2002-07-11 Shell Int Research A process for separation of the dipotassium salt of naphthalene dicarboxylic acid using activated carbon beds

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee