GB849189A - Improvements in the purification of crude terephthalic acid - Google Patents

Improvements in the purification of crude terephthalic acid

Info

Publication number
GB849189A
GB849189A GB10109/59A GB1010959A GB849189A GB 849189 A GB849189 A GB 849189A GB 10109/59 A GB10109/59 A GB 10109/59A GB 1010959 A GB1010959 A GB 1010959A GB 849189 A GB849189 A GB 849189A
Authority
GB
United Kingdom
Prior art keywords
terephthalic acid
purification
pyrrolidones
crude terephthalic
oxidation
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
GB10109/59A
Inventor
Heinz Bille
Friedrich Ebel
Hans-Georg Trieschmann
Hans Weidinger
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB849189A publication Critical patent/GB849189A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/14—Monocyclic dicarboxylic acids
    • C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
    • C07C63/26—1,4 - Benzenedicarboxylic acid
    • 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
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation

Abstract

Crude terephthalic acid is purified by recrystallisation from a N-alkyl-pyrrolidone. The process is particularly suitable for the purification of terephthalic acid obtained by oxidation, e.g., with nitric acid, of dialkyl benzenes, e.g., xylene and p-diisopropyl benzene or dialkyl benzenes halogenated in the side chains. Examples are furnished in which terephthalic acid containing nitrogenous impurities obtained by nitric acid oxidation of p-diisopropyl benzene are recrystallised from N-methyl and N-butyl-pyrrolidones. Other pyrrolidones specified include N-ethyl and N-propyl pyrrolidones.
GB10109/59A 1958-03-26 1959-03-24 Improvements in the purification of crude terephthalic acid Expired GB849189A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE849189X 1958-03-26

Publications (1)

Publication Number Publication Date
GB849189A true GB849189A (en) 1960-09-21

Family

ID=6775794

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10109/59A Expired GB849189A (en) 1958-03-26 1959-03-24 Improvements in the purification of crude terephthalic acid

Country Status (1)

Country Link
GB (1) GB849189A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999062857A1 (en) * 1998-05-29 1999-12-09 Hfm International, Inc. Method for preparing purified terephthalic acid and isophthalic acid from mixed xylenes
US6113866A (en) 1995-06-07 2000-09-05 Hfm International, Inc. Apparatus for preparing purified terephthalic acid
JP2002518359A (en) * 1998-06-16 2002-06-25 エイチエフエム インターナショナル，インコーポレイテッド Method for reducing carboxybenzaldehyde in terephthalic acid or isophthalic acid
WO2006088470A2 (en) * 2004-04-09 2006-08-24 Gtc Technology Inc. Purification of carboxylic acids by complexation with selective solvents
JP4817496B2 (en) * 1998-05-29 2011-11-16 ジーティーシー テクノロジー エルピー Process for producing purified terephthalic acid and isophthalic acid from mixed xylene

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6113866A (en) 1995-06-07 2000-09-05 Hfm International, Inc. Apparatus for preparing purified terephthalic acid
WO1999062857A1 (en) * 1998-05-29 1999-12-09 Hfm International, Inc. Method for preparing purified terephthalic acid and isophthalic acid from mixed xylenes
JP4817496B2 (en) * 1998-05-29 2011-11-16 ジーティーシー テクノロジー エルピー Process for producing purified terephthalic acid and isophthalic acid from mixed xylene
JP2002518359A (en) * 1998-06-16 2002-06-25 エイチエフエム インターナショナル，インコーポレイテッド Method for reducing carboxybenzaldehyde in terephthalic acid or isophthalic acid
JP4704561B2 (en) * 1998-06-16 2011-06-15 ジーティーシー テクノロジー エルピー Method for reducing carboxybenzaldehyde in terephthalic acid or isophthalic acid
WO2006088470A2 (en) * 2004-04-09 2006-08-24 Gtc Technology Inc. Purification of carboxylic acids by complexation with selective solvents
WO2006088470A3 (en) * 2004-04-09 2007-03-29 Gtc Technology Inc Purification of carboxylic acids by complexation with selective solvents
US7307188B2 (en) 2004-04-09 2007-12-11 Gtc Technology, Inc. Purification of carboxylic acids by complexation with selective solvents

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