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1. WO2012175229 - PROCESS FOR SEPARATING MONOCHLOROACETIC ACID AND DICHLOROACETIC ACID VIA EXTRACTIVE DISTILLATION

Publication Number WO/2012/175229
Publication Date 27.12.2012
International Application No. PCT/EP2012/054310
International Filing Date 13.03.2012
IPC
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
51
Preparation of carboxylic acids or their salts, halides, or anhydrides
42
Separation; Purification; Stabilisation; Use of additives
43
by change of the physical state, e.g. crystallisation
44
by distillation
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
51
Preparation of carboxylic acids or their salts, halides, or anhydrides
42
Separation; Purification; Stabilisation; Use of additives
43
by change of the physical state, e.g. crystallisation
44
by distillation
46
by azeotropic distillation
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
51
Preparation of carboxylic acids or their salts, halides, or anhydrides
42
Separation; Purification; Stabilisation; Use of additives
48
by liquid-liquid treatment
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
53
Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
15
containing halogen
16
Halogenated acetic acids
C07C 51/44 (2006.01)
C07C 51/46 (2006.01)
C07C 51/48 (2006.01)
C07C 53/16 (2006.01)
CPC
C07C 51/44
C07C 51/46
C07C 51/48
C07C 51/50
C07C 51/62
C07C 53/16
Applicants
  • AKZO NOBEL CHEMICALS INTERNATIONAL B.V. [NL/NL]; Stationsstraat 77 NL-3811 MH Amersfoort, NL (AllExceptUS)
  • JONGMANS, Mark Theodorus Gerardus [NL/NL]; NL (UsOnly)
  • PRAGT, Johannes Josef [NL/NL]; NL (UsOnly)
  • BARGEMAN, Gerrald [NL/NL]; NL (UsOnly)
  • SCHUUR, Boelo [NL/NL]; NL (UsOnly)
  • AALDERING, Jacobus Theodorus Josef [NL/NL]; NL (UsOnly)
  • DE HAAN, André Banier [NL/NL]; NL (UsOnly)
  • NIEUWHOF, Melle Rinze [NL/NL]; NL (UsOnly)
  • VERWER, Paul [NL/NL]; NL (UsOnly)
  • KISS, Anton Alexandru [RO/NL]; NL (UsOnly)
  • TEN KATE, Antoon Jacob Berend [NL/NL]; NL (UsOnly)
  • VAN STRIEN, Cornelis Johannes Govardus [NL/NL]; NL (UsOnly)
Inventors
  • JONGMANS, Mark Theodorus Gerardus; NL
  • PRAGT, Johannes Josef; NL
  • BARGEMAN, Gerrald; NL
  • SCHUUR, Boelo; NL
  • AALDERING, Jacobus Theodorus Josef; NL
  • DE HAAN, André Banier; NL
  • NIEUWHOF, Melle Rinze; NL
  • VERWER, Paul; NL
  • KISS, Anton Alexandru; NL
  • TEN KATE, Antoon Jacob Berend; NL
  • VAN STRIEN, Cornelis Johannes Govardus; NL
Agents
  • AKZO NOBEL IP DEPARTMENT; Velperweg 76 NL-6824 BM Arnheim, NL
Priority Data
11170773.321.06.2011EP
61/504,42205.07.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR SEPARATING MONOCHLOROACETIC ACID AND DICHLOROACETIC ACID VIA EXTRACTIVE DISTILLATION
(FR) PROCÉDÉ DE SÉPARATION DE L'ACIDE MONOCHLOROACÉTIQUE ET DE L'ACIDE DICHLOROACÉTIQUE PAR DISTILLATION EXTRACTIVE
Abstract
(EN)
The present invention pertains to a process for separating monochloroacetic acid and dichloroacetic acid from one another via extractive distillation, comprising the steps of (i) contacting a mixture comprising monochloroacetic acid and dichloroacetic acid with an extractive agent which is chemically stable and which hasa BF3 affinity of between 65 kJ/mole and 110 kJ/mole, (ii) distilling the mixture to obtain a monochloroacetic acid stream and a stream comprising dichloroacetic acid and the extractive agent, and (iii) regenerating the extractive agent.
(FR)
Cette invention concerne un procédé de séparation de l'acide monochloroacétique et de l'acide dichloroacétique l'un de l'autre par distillation extractive, ledit procédé comprenant les étapes de (i) mise en contact d'un mélange comprenant de l'acide monochloroacétique et de l'acide dichloroacétique avec un agent d'extraction qui est chimiquement stable et a une affinité pour BF3 comprise entre 65 et 110 kJ/mole, (ii) distillation du mélange pour obtenir un flux d'acide monochloroacétique et un flux comprenant l'acide dichloroacétique et l'agent d'extraction, et (iii) régénération de l'agent d'extraction.
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