CA2248288C - Production d'acides polycarboxyliques aromatiques - Google Patents

Production d'acides polycarboxyliques aromatiques Download PDF

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Publication number
CA2248288C
CA2248288C CA002248288A CA2248288A CA2248288C CA 2248288 C CA2248288 C CA 2248288C CA 002248288 A CA002248288 A CA 002248288A CA 2248288 A CA2248288 A CA 2248288A CA 2248288 C CA2248288 C CA 2248288C
Authority
CA
Canada
Prior art keywords
carboxylic acid
aromatic carboxylic
mother liquor
fraction
solids
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 - Fee Related
Application number
CA002248288A
Other languages
English (en)
Other versions
CA2248288A1 (fr
Inventor
David Robert Bickham
Ian Charles Jeffery
Keith Whiston
Brian Robert Watson
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.)
Invista Technologies SARL Switzerland
Original Assignee
Invista Technologies SARL Switzerland
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
Priority claimed from GBGB9603740.3A external-priority patent/GB9603740D0/en
Priority claimed from GBGB9617994.0A external-priority patent/GB9617994D0/en
Application filed by Invista Technologies SARL Switzerland filed Critical Invista Technologies SARL Switzerland
Priority claimed from PCT/GB1997/000439 external-priority patent/WO1997030963A1/fr
Publication of CA2248288A1 publication Critical patent/CA2248288A1/fr
Application granted granted Critical
Publication of CA2248288C publication Critical patent/CA2248288C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation

Landscapes

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

Abstract

On sépare en fraction de recyclage (30) et en fraction de purge (32) une liqueur mère provenant d'un procédé (18) de séparation primaire solides-liquide qui permet de séparer des cristaux d'acide carboxylique aromatique d'un mélange de ces derniers contenu dans la liqueur mère. La fraction de recyclage (30) est renvoyée dans un réacteur (10) dans lequel se forme l'acide carboxylique aromatique par oxydation en phase liquide d'un précurseur de ce dernier. La fraction de purge (32) est concentrée dans un évaporateur (42) pour récupérer le solvant et produire un résidu destiné à être jeté ou à subir un autre traitement. Avant sa concentration, la fraction de purge (32) est soumise à une séparation solides-liquide dans une unité de filtration (34) pour éliminer les particules solides et réduire ainsi la charge pesant sur l'évaporateur (42) et faciliter la récupération de quantités plus importantes de solvant et la récupération de particules fines d'acide carboxylique aromatique pour les envoyer en recyclage dans le réacteur (10), par exemple.
CA002248288A 1996-02-22 1997-02-18 Production d'acides polycarboxyliques aromatiques Expired - Fee Related CA2248288C (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GBGB9603740.3A GB9603740D0 (en) 1996-02-22 1996-02-22 Production of aromatic polycarboxylic acids
GB9603740.3 1996-02-22
GBGB9617994.0A GB9617994D0 (en) 1996-08-29 1996-08-29 Production of aromatic carboxylic acids
GB9617994.0 1996-08-29
US3327696P 1996-12-09 1996-12-09
US60/033,276 1996-12-09
PCT/GB1997/000439 WO1997030963A1 (fr) 1996-02-22 1997-02-18 Production d'acides polycarboxyliques aromatiques

Publications (2)

Publication Number Publication Date
CA2248288A1 CA2248288A1 (fr) 1997-08-28
CA2248288C true CA2248288C (fr) 2007-02-06

Family

ID=37734912

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002248288A Expired - Fee Related CA2248288C (fr) 1996-02-22 1997-02-18 Production d'acides polycarboxyliques aromatiques

Country Status (1)

Country Link
CA (1) CA2248288C (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7897809B2 (en) 2005-05-19 2011-03-01 Eastman Chemical Company Process to produce an enrichment feed
US7919652B2 (en) 2005-05-19 2011-04-05 Eastman Chemical Company Process to produce an enriched composition through the use of a catalyst removal zone and an enrichment zone
US7880031B2 (en) 2005-05-19 2011-02-01 Eastman Chemical Company Process to produce an enrichment feed
US7834208B2 (en) 2005-05-19 2010-11-16 Eastman Chemical Company Process to produce a post catalyst removal composition
US7741516B2 (en) 2005-05-19 2010-06-22 Eastman Chemical Company Process to enrich a carboxylic acid composition
US7557243B2 (en) 2005-05-19 2009-07-07 Eastman Chemical Company Enriched terephthalic acid composition
US7884231B2 (en) 2005-05-19 2011-02-08 Eastman Chemical Company Process to produce an enriched composition
US7432395B2 (en) 2005-05-19 2008-10-07 Eastman Chemical Company Enriched carboxylic acid composition
US7888529B2 (en) 2006-03-01 2011-02-15 Eastman Chemical Company Process to produce a post catalyst removal composition

Also Published As

Publication number Publication date
CA2248288A1 (fr) 1997-08-28

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