GB886208A - Improved method and plant for the production of dicarboxylic acids or anhydrides thereof - Google Patents

Improved method and plant for the production of dicarboxylic acids or anhydrides thereof

Info

Publication number
GB886208A
GB886208A GB27152/59A GB2715259A GB886208A GB 886208 A GB886208 A GB 886208A GB 27152/59 A GB27152/59 A GB 27152/59A GB 2715259 A GB2715259 A GB 2715259A GB 886208 A GB886208 A GB 886208A
Authority
GB
United Kingdom
Prior art keywords
anhydride
air
cyclone
cyclones
pipes
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
GB27152/59A
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.)
JAEGER FABRIK CHEM ERNST
Original Assignee
JAEGER FABRIK CHEM ERNST
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 JAEGER FABRIK CHEM ERNST filed Critical JAEGER FABRIK CHEM ERNST
Publication of GB886208A publication Critical patent/GB886208A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/26—Multiple arrangement thereof for series flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D7/00—Sublimation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

<PICT:0886208/III/1> A hot mixture containing air and the vapour of a sublimable dicarboxylic acid or its anhydride, after partial cooling by passage through a heat-exchanger, is mixed with cool air to reduce its temperature to a point near the sublimation temperature of the acid or anhydride, and the mixture is passed through a plurality of cyclones arranged in series in which the dicarboxylic acid or anhydride is separated. Additional cooling air may be added to the mixture as it enters each cyclone. As shown, the products of the vapourphase oxidation of naphthalene with air or oxygen, after passage through a heat-exchanger, are passed in turn through cyclones 1-4 through pipes 5, 7, 8, 9 to each of which cooling air is supplied by pipes 6, 10, 11, 12, the flow being regulated by a fan 13. Phthalic anhydride is discharged from each cyclone through a valve 40. The process may be applied also to the recovery of isophthalic and terephthalic acids and maleic acid and its anhydride. The apparatus shown may be modified by arranging the cyclones in two pairs mounted in parallel, and each cyclone may have a cooling jacket.ALSO:<PICT:0886208/IV (b)/1> A hot mixture containing air and the vapour of a sublimable dicarboxylic acid or its anhydride, after partial cooling by passage through a heatexchanger, is mixed with cool air to reduce its temperature to a point near the sublimation temperature of the acid or anhydride, and the mixture is passed through a plurality of cyclones arranged in series in which the dicarboxylic acid or anhydride is separated. Additional cooling air may be added to the mixture as it enters each cyclone. As shown, the products of the vapour-phase oxidation of naphthalene with air or oxygen, after passage through a heatexchanger, are passed in turn through cyclones 1-4 through pipes 5, 7, 8, 9, to each of which cooling air is supplied by pipes 6, 10, 11, 12, the flow being regulated by a fan 13. Phthalic anhydride is discharged from each cyclone through a valve 40. The process may be applied also to the recovery of isophthalic and terephthalic acids and maleic acid and its anhydride The apparatus shown may be modified by arranging the cyclones in two pairs mounted in parallel, and each cyclone may have a cooling jacket.
GB27152/59A 1959-03-28 1959-08-07 Improved method and plant for the production of dicarboxylic acids or anhydrides thereof Expired GB886208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1253230X 1959-03-28

Publications (1)

Publication Number Publication Date
GB886208A true GB886208A (en) 1962-01-03

Family

ID=6833190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27152/59A Expired GB886208A (en) 1959-03-28 1959-08-07 Improved method and plant for the production of dicarboxylic acids or anhydrides thereof

Country Status (2)

Country Link
FR (1) FR1253230A (en)
GB (1) GB886208A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8875903B2 (en) 2007-03-19 2014-11-04 Palo Alto Research Center Incorporated Vortex structure for high throughput continuous flow separation
AU2012247204B2 (en) * 2011-04-28 2017-01-12 Ecomin Srl Method and apparatus for particle separation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8875903B2 (en) 2007-03-19 2014-11-04 Palo Alto Research Center Incorporated Vortex structure for high throughput continuous flow separation
AU2012247204B2 (en) * 2011-04-28 2017-01-12 Ecomin Srl Method and apparatus for particle separation

Also Published As

Publication number Publication date
FR1253230A (en) 1961-02-10

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