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WO2002068083A1 - Methode de distillation azeotropique - Google Patents

Methode de distillation azeotropique Download PDF

Info

Publication number
WO2002068083A1
WO2002068083A1 PCT/JP2001/011382 JP0111382W WO02068083A1 WO 2002068083 A1 WO2002068083 A1 WO 2002068083A1 JP 0111382 W JP0111382 W JP 0111382W WO 02068083 A1 WO02068083 A1 WO 02068083A1
Authority
WO
WIPO (PCT)
Prior art keywords
azeotropic distillation
carboxylic acid
entrainer
concentration
distillation
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.)
Ceased
Application number
PCT/JP2001/011382
Other languages
English (en)
Japanese (ja)
Inventor
Motoki Numata
Takayuki Isogai
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.)
Mitsubishi Chemical Corp
Original Assignee
Mitsubishi Chemical Corp
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 Mitsubishi Chemical Corp filed Critical Mitsubishi Chemical Corp
Publication of WO2002068083A1 publication Critical patent/WO2002068083A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
    • B01D3/36—Azeotropic distillation
    • 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
    • C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
    • C07C51/46—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation by azeotropic distillation

Definitions

  • the present invention relates to an azeotropic distillation method.
  • the invention finds particular use in recovering aliphatic carboxylic acids by separating water from an aqueous feed stream containing aliphatic carboxylic acids, such as acetic acid, by azeotropic distillation. More specifically, the present invention relates to a method suitable for recovering an aliphatic carboxylic acid used as a solvent in a method for producing an aromatic carboxylic acid by a liquid phase oxidation reaction in a reaction medium containing the aliphatic carboxylic acid.
  • a condition that the middle-stage extraction position is lower than the middle point of the azeotropic region preferably by setting the lower limit of the azeotropic region near the middle-stage extraction position, to reduce the aromatic hydrocarbon and entrainer concentration in the middle-stage extraction To optimize.
  • the length of the azeotropic region in the height direction of the column and the water reflux ratio also affect the composition of the middle extract, so the conditions are determined to achieve the targets. The longer the azeotropic region and the higher the water reflux ratio, the more advantageous the composition of the middle extract.
  • these have the disadvantages of increasing tower height and increasing energy use. Therefore, it is not set excessively, and the composition of the middle extract is set to the minimum allowable range required to achieve the target.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

L'invention concerne une méthode permettant d'effectuer une distillation azéotropique d'un objet distillé formé par deux substances dont une à température d'ébullition basse et une à température d'ébullition élevée, à dissolution élevée ou consommation d'énergie réduite, à l'aide d'un élément d'entraînement capable de former un azéotrope avec au moins une des deux substances. Ce procédé consiste à introduire l'objet distillé dans une colonne de distillation azéotropique par au moins deux orifices d'alimentation situés à des hauteurs différentes, à introduire l'objet distillé à point d'ébullition bas à faible densité par les orifices d'alimentation inférieurs, à introduire l'objet distillé comprenant la substance à point d'ébullition bas à densité élevée par les orifices d'alimentation supérieurs et à extraire l'objet distillé de façon qu'une fraction à point d'ébullition le plus bas puisse être prélevée par le haut de la colonne de distillation azéotropique, une fraction à point d'ébullition de plus haut puisse être prélevée par le bas de la colonne de distillation azéotropique, et une fraction à point d'ébullition intermédiaire puisse être prélevée par la partie intermédiaire de la colonne de distillation.
PCT/JP2001/011382 2001-02-27 2001-12-25 Methode de distillation azeotropique Ceased WO2002068083A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001051554 2001-02-27
JP2001-51554 2001-02-27

Publications (1)

Publication Number Publication Date
WO2002068083A1 true WO2002068083A1 (fr) 2002-09-06

Family

ID=18912317

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/011382 Ceased WO2002068083A1 (fr) 2001-02-27 2001-12-25 Methode de distillation azeotropique

Country Status (2)

Country Link
CN (1) CN1236835C (fr)
WO (1) WO2002068083A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103848733A (zh) * 2012-12-04 2014-06-11 新鼎系统股份有限公司 芳香羧酸的回收脱水共沸蒸馏工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104645896B (zh) * 2015-01-09 2016-05-04 烟台大学 一种偶相催化反应-非均相共沸精馏系统及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53127430A (en) * 1977-04-04 1978-11-07 Montedison Spa Improved method of recovering catalyst and solvent from mother liquid of phthalic acid synthesizing process
US4204915A (en) * 1977-03-19 1980-05-27 Mitsui Petrochemical Industries, Ltd. Process for azeotropic distillation
WO1996006065A1 (fr) * 1994-08-23 1996-02-29 Imperial Chemical Industries Plc Deshydratation de l'acide acetique par distillation azeotropique dans le processus de production d'un acide aromatique
WO1998045239A1 (fr) * 1997-04-09 1998-10-15 E.I. Du Pont De Nemours And Company Procede de separation de l'eau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4204915A (en) * 1977-03-19 1980-05-27 Mitsui Petrochemical Industries, Ltd. Process for azeotropic distillation
JPS53127430A (en) * 1977-04-04 1978-11-07 Montedison Spa Improved method of recovering catalyst and solvent from mother liquid of phthalic acid synthesizing process
WO1996006065A1 (fr) * 1994-08-23 1996-02-29 Imperial Chemical Industries Plc Deshydratation de l'acide acetique par distillation azeotropique dans le processus de production d'un acide aromatique
WO1998045239A1 (fr) * 1997-04-09 1998-10-15 E.I. Du Pont De Nemours And Company Procede de separation de l'eau

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103848733A (zh) * 2012-12-04 2014-06-11 新鼎系统股份有限公司 芳香羧酸的回收脱水共沸蒸馏工艺

Also Published As

Publication number Publication date
CN1236835C (zh) 2006-01-18
CN1492774A (zh) 2004-04-28

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