CA2248288A1 - Production of aromatic polycarboxylic acids - Google Patents

Production of aromatic polycarboxylic acids

Info

Publication number
CA2248288A1
CA2248288A1 CA002248288A CA2248288A CA2248288A1 CA 2248288 A1 CA2248288 A1 CA 2248288A1 CA 002248288 A CA002248288 A CA 002248288A CA 2248288 A CA2248288 A CA 2248288A CA 2248288 A1 CA2248288 A1 CA 2248288A1
Authority
CA
Canada
Prior art keywords
fraction
carboxylic acid
aromatic carboxylic
recycle
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.)
Granted
Application number
CA002248288A
Other languages
French (fr)
Other versions
CA2248288C (en
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
Individual
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 Individual filed Critical Individual
Priority claimed from PCT/GB1997/000439 external-priority patent/WO1997030963A1/en
Publication of CA2248288A1 publication Critical patent/CA2248288A1/en
Application granted granted Critical
Publication of CA2248288C publication Critical patent/CA2248288C/en
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

Abstract

Mother liquor, derived from a primary solids-liquid separation process (18) for separating aromatic carboxylic acid crystals from a slurry thereof in the mother liquor, is split into a recycle fraction (30) and a purge fraction (32). the recycle fraction (30) is returned to a reactor (10) in which the aromatic carboxylic acid is formed by liquid phase oxidation of a precursor thereof. The purge fraction (32) is concentrated in evaporator (42) to recover solvent and produce a residue for disposal or further treatment. Before concentration the purge fraction (32), it is subjected to solids-liquid separation in filtration unit (34) to remove fine solids thereby reducing the load on the evaporator (42) and facilitating the recovery of greater amounts of the solvent along with recovery of aromatic carboxylic acid fines, e.g.
for recycle to the reactor (10).
CA002248288A 1996-02-22 1997-02-18 Production of aromatic polycarboxylic acids Expired - Fee Related CA2248288C (en)

Applications Claiming Priority (7)

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

Publications (2)

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

Family

ID=37734912

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002248288A Expired - Fee Related CA2248288C (en) 1996-02-22 1997-02-18 Production of aromatic polycarboxylic acids

Country Status (1)

Country Link
CA (1) CA2248288C (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008033566A1 (en) * 2006-09-15 2008-03-20 Eastman Chemical Company A process to produce an enrichment feed
US7432395B2 (en) 2005-05-19 2008-10-07 Eastman Chemical Company Enriched carboxylic acid composition
US7557243B2 (en) 2005-05-19 2009-07-07 Eastman Chemical Company Enriched terephthalic acid composition
US7741516B2 (en) 2005-05-19 2010-06-22 Eastman Chemical Company Process to enrich a carboxylic acid composition
US7834208B2 (en) 2005-05-19 2010-11-16 Eastman Chemical Company Process to produce a post catalyst removal composition
US7855305B2 (en) 2005-05-19 2010-12-21 Eastman Chemical Company Process to produce an enriched composition
US7880031B2 (en) 2005-05-19 2011-02-01 Eastman Chemical Company Process to produce an enrichment feed
US7888529B2 (en) 2006-03-01 2011-02-15 Eastman Chemical Company Process to produce a post catalyst removal composition
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

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7880031B2 (en) 2005-05-19 2011-02-01 Eastman Chemical Company Process to produce an enrichment feed
US7432395B2 (en) 2005-05-19 2008-10-07 Eastman Chemical Company Enriched carboxylic acid composition
US7557243B2 (en) 2005-05-19 2009-07-07 Eastman Chemical Company Enriched terephthalic acid composition
US7741516B2 (en) 2005-05-19 2010-06-22 Eastman Chemical Company Process to enrich a carboxylic acid composition
US7834208B2 (en) 2005-05-19 2010-11-16 Eastman Chemical Company Process to produce a post catalyst removal composition
US7855305B2 (en) 2005-05-19 2010-12-21 Eastman Chemical Company Process to produce an enriched composition
US7884231B2 (en) 2005-05-19 2011-02-08 Eastman Chemical Company Process to produce an enriched composition
US7884233B2 (en) 2005-05-19 2011-02-08 Eastman Chemical Company Enriched terephthalic acid composition
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
US8053597B2 (en) 2005-05-19 2011-11-08 Grupo Petrotemex, S.A. De C.V. Enriched terephthalic acid composition
US7888529B2 (en) 2006-03-01 2011-02-15 Eastman Chemical Company Process to produce a post catalyst removal composition
WO2008033566A1 (en) * 2006-09-15 2008-03-20 Eastman Chemical Company A process to produce an enrichment feed

Also Published As

Publication number Publication date
CA2248288C (en) 2007-02-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed