CA2525898A1 - Apparatus for and method of producing aromatic carboxylic acids - Google Patents

Apparatus for and method of producing aromatic carboxylic acids Download PDF

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Publication number
CA2525898A1
CA2525898A1 CA002525898A CA2525898A CA2525898A1 CA 2525898 A1 CA2525898 A1 CA 2525898A1 CA 002525898 A CA002525898 A CA 002525898A CA 2525898 A CA2525898 A CA 2525898A CA 2525898 A1 CA2525898 A1 CA 2525898A1
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CA
Canada
Prior art keywords
reactor
mixing element
diameter
impeller
vessel
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
CA002525898A
Other languages
French (fr)
Other versions
CA2525898C (en
Inventor
David Robert Bickham
Michael Cooke
Martin Reid Burton Davis
Samuel Duncan Housley
Finbar Gerald Mcdonnell
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Invista Technologies SARL USA
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2525898A1 publication Critical patent/CA2525898A1/en
Application granted granted Critical
Publication of CA2525898C publication Critical patent/CA2525898C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/006—Baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/86—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis co-operating with deflectors or baffles fixed to the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/91—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0066—Stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B01J19/1806—Stationary reactors having moving elements inside resulting in a turbulent flow of the reactants, such as in centrifugal-type reactors, or having a high Reynolds-number
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0427—Numerical distance values, e.g. separation, position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00245—Avoiding undesirable reactions or side-effects
    • B01J2219/00252—Formation of deposits other than coke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00761—Details of the reactor
    • B01J2219/00763—Baffles
    • B01J2219/00765—Baffles attached to the reactor wall
    • B01J2219/00768—Baffles attached to the reactor wall vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00761—Details of the reactor
    • B01J2219/00763—Baffles
    • B01J2219/00779—Baffles attached to the stirring means

Abstract

A reactor for the oxidation of a precursor to an aromatic carboxylic acid or ester thereof in a liquid phase reaction mixture is disclosed. The reactor (1) comprises an elongate vessel, substantially vertical in use, having an upper mixing element (5) and a lower mixing element (3), characterised in that the upper mixing element (5) is an axial pumping impeller and the lower mixing element (3) is a radial pumping impeller. A process of producing a carboxylic acid or ester thereof in a reactor of the invention is also disclosed. In use, the configuration of mixing elements leads to three highly turbulent mixing zones. In a preferred embodiment of the process of the present invention oxidant, from one inlet, and solvent, precursor and catalyst, are introduced directly into a mixing zone. The highly turbulent mixing zones lead to rapid mass transfer suppressing the formation of unwanted, coloured by-products and reduced reactor fouling.

Claims (22)

1. A reactor for the oxidation of a precursor to an aromatic carboxylic acid or ester thereof in a liquid phase reaction mixture, the reactor comprising an elongate baffled vessel, substantially vertical in use, having an upper mixing element and a lower mixing element, characterised in that the upper mixing element is an axial up-pumping impeller and the lower mixing element is a radial pumping impeller.
2. The reactor of claim 1 wherein the ratio of the swept diameter of the upper mixing element to the vessel diameter is from 0.3 to 0.7.
3. The reactor of claim 2 wherein the ratio of the swept diameter of the upper mixing element to the vessel diameter is from 0.4 to 0.6.
4. The reactor of claim 1 wherein the ratio of the submergence of the upper mixing element to the swept diameter is from 0.6 to 1.2.
5. The reactor of claim 1 wherein the ratio of the swept diameter of the lower mixing element to the vessel diameter is from 0.4 to 0.6.
6. The reactor of claim 5 wherein the ratio of the swept diameter of the lower mixing element to the vessel diameter is from 0.45 to 0.55.
7. The reactor of claim 3 or claim 6 wherein the ratio of the clearance of the lower mixing element from the base of vessel to the vessel diameter is from 0.1 to 1Ø
8. The reactor of claim 7 wherein the lower mixing element is a curved blade radial impeller which has parabolic blades with a plane of symmetry which is parallel to the plane of rotation.
9. The reactor of claim 1 or claim 8 wherein the upper mixing element imparts from 10 to 50% of the total power imparted by the upper mixing element, lower mixing element and any further agitator elements to the reaction mixture.
10. The reactor of claim 1 or claim 9 wherein the reactor comprises means for imparting through the agitator elements to the reaction mixture a power input of 2 to 15 kW per m3 of reaction mixture.
11. The reactor of claim1 or claim 10 comprising an oxidant inlet having one or more inlet mouths for introducing an oxidant into the reactor, wherein the oxidant inlet mouth is disposed such that in use oxidant is introduced directly into a highly turbulent region of a mixing zone.
12. The reactor of claim 11 wherein the mixing zone is a lower mixing zone.
13. The reactor of claim 11 or claim 12 wherein the oxidant inlet mouth is located below the plane of the upper surface of the lower impeller.
14. The reactor of claim 13 wherein the oxidant inlet mouth is located such that the ratio of the distance between the swept diameter of the lower mixing element and the wall of the inlet mouth to the vessel diameter is in the range of ratio of 0.02 to 0.08.
15. The reactor of claim 14 comprising a liquid inlet having an inlet mouth for introducing a liquid feed of solvent, precursor and catalyst into the reactor.
16. The reactor of claim 15 wherein the liquid feed inlet mouth is disposed such that in use liquid feed is introduced into a region where reaction mixture is induced to flow into a mixing zone.
17. The reactor of claim 16 wherein the mixing zone is a lower moving zone.
18. The reactor of claim 15 wherein the liquid inlet mouth is located between the plane of the upper surface of the lower impeller and the plane of the lower surface of the lower impeller, and between the swept diameter of the lower mixing element and the vessel wall.
19. The reactor of claim 15 wherein the liquid feed inlet mouth is disposed such that in use liquid feed is introduced into a region where reaction mixture is induced to flow via a mixing element into a highly turbulent region of a mixing zone.
20. The reactor of claim 19 wherein the liquid inlet mouth is located between the plane of the upper surface of the lower impeller and the plane of the lower surface of the lower impeller, and between the swept diameter of the lower mixing element and the vessel wall.
21. A process of oxidising a precursor to an aromatic carboxylic acid or ester thereof in a liquid phase reaction mixture, comprising contacting one or more precursors of the aromatic carboxylic acid with an oxidant, in the presence of a catalyst and a liquid phase solvent, said contacting being effected in a reactor comprising an elongate baffled vessel, substantially vertical in use, having an upper mixing element and a lower mixing element, characterized in that the upper mixing element is an axial pumping impeller and the lower mixing element is a radial pumping impeller.
22. The process of claim 21 wherein the aromatic carboxylic acid is terephthalic acid or isophthalic acid.
CA2525898A 2003-05-22 2004-05-20 Apparatus for and method of producing aromatic carboxylic acids Expired - Fee Related CA2525898C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/443,542 US7153480B2 (en) 2003-05-22 2003-05-22 Apparatus for and method of producing aromatic carboxylic acids
US10/443,542 2003-05-22
PCT/US2004/016180 WO2004105935A1 (en) 2003-05-22 2004-05-20 Apparatus for and method of producing aromatic carboxylic acids

Publications (2)

Publication Number Publication Date
CA2525898A1 true CA2525898A1 (en) 2004-12-09
CA2525898C CA2525898C (en) 2012-11-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2525898A Expired - Fee Related CA2525898C (en) 2003-05-22 2004-05-20 Apparatus for and method of producing aromatic carboxylic acids

Country Status (15)

Country Link
US (1) US7153480B2 (en)
EP (1) EP1635942B1 (en)
KR (1) KR101137641B1 (en)
CN (1) CN100376321C (en)
AR (1) AR044435A1 (en)
AT (1) ATE411102T1 (en)
BR (1) BRPI0411146B1 (en)
CA (1) CA2525898C (en)
DE (1) DE602004017173D1 (en)
ES (1) ES2314420T3 (en)
MX (1) MXPA05012598A (en)
MY (1) MY135637A (en)
TW (1) TWI331991B (en)
WO (1) WO2004105935A1 (en)
ZA (1) ZA200509228B (en)

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Also Published As

Publication number Publication date
CN100376321C (en) 2008-03-26
TWI331991B (en) 2010-10-21
WO2004105935A1 (en) 2004-12-09
US20040234435A1 (en) 2004-11-25
EP1635942A1 (en) 2006-03-22
MXPA05012598A (en) 2006-02-08
BRPI0411146A (en) 2006-07-11
KR20060024380A (en) 2006-03-16
ES2314420T3 (en) 2009-03-16
BRPI0411146B1 (en) 2016-07-26
ATE411102T1 (en) 2008-10-15
CA2525898C (en) 2012-11-06
US7153480B2 (en) 2006-12-26
ZA200509228B (en) 2007-03-28
TW200510293A (en) 2005-03-16
EP1635942B1 (en) 2008-10-15
AR044435A1 (en) 2005-09-14
MY135637A (en) 2008-05-30
KR101137641B1 (en) 2012-04-19
DE602004017173D1 (en) 2008-11-27
CN1822900A (en) 2006-08-23

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