Processing

Please wait...

Settings

Settings

Goto Application

1. WO2013150042 - PROCESS FOR SEPARATING MONOCHLOROACETIC ACID AND DICHLOROACETIC ACID VIA EXTRACTIVE DISTILLATION USING AN ORGANIC SOLVENT

Publication Number WO/2013/150042
Publication Date 10.10.2013
International Application No. PCT/EP2013/056969
International Filing Date 03.04.2013
IPC
C07C 51/46 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
42Separation; Purification; Stabilisation; Use of additives
43by change of the physical state, e.g. crystallisation
44by distillation
46by azeotropic distillation
C07C 53/16 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
53Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
15containing halogen
16Halogenated acetic acids
CPC
C07C 43/275
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
43Ethers; Compounds having groups, groups or groups
02Ethers
257having an ether-oxygen atom bound to carbon atoms both belonging to six-membered aromatic rings
275having all ether-oxygen atoms bound to carbon atoms of six-membered aromatic rings
C07C 51/44
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
42Separation; Purification; Stabilisation; Use of additives
43by change of the physical state, e.g. crystallisation
44by distillation
C07C 51/445
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
42Separation; Purification; Stabilisation; Use of additives
43by change of the physical state, e.g. crystallisation
44by distillation
445by steam distillation
C07C 51/46
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
42Separation; Purification; Stabilisation; Use of additives
43by change of the physical state, e.g. crystallisation
44by distillation
46by azeotropic distillation
C07C 53/126
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
53Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
126Acids containing more than four carbon atoms
C07C 53/16
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
53Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
15containing halogen
16Halogenated acetic acids
Applicants
  • AKZO NOBEL CHEMICALS INTERNATIONAL B.V. [NL]/[NL]
Inventors
  • PRAGT, Johannes Jozef
  • JONGMANS, Mark Theodorus Gerardus
  • BARGEMAN, Gerrald
  • SCHUUR, Boelo
  • AALDERING, Jacobus Theodorus Josef
  • NIEUWHOF, Melle Rinze
  • KISS, Anton Alexandru
  • DE HAAN, André Banier
  • LONDOÑO RODRIGUEZ, Alex
  • VAN STRIEN, Cornelis Johannes Govardus
Agents
  • AKZO NOBEL IP DEPARTMENT
Priority Data
12002517.606.04.2012EP
61/621,13406.04.2012US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR SEPARATING MONOCHLOROACETIC ACID AND DICHLOROACETIC ACID VIA EXTRACTIVE DISTILLATION USING AN ORGANIC SOLVENT
(FR) PROCÉDÉ DE SÉPARATION D'ACIDE MONOCHLOROACÉTIQUE ET D'ACIDE DICHLOROACÉTIQUE VIA UNE DISTILLATION EXTRACTIVE AU MOYEN D'UN SOLVANT ORGANIQUE
Abstract
(EN) The present invention pertains to a process for separating monochloroacetic acid and dichloroacetic acid from one another via extractive distillation using (a) an extractive agent that is chemically stable and has a BF3 affinity of between 65 kJ/mole and 110 kJ/mole and (b) an organic solvent that is either an acid with a lowest pKa of between 3.0 and 6.5 or a base with a BF3 affinity of between 40 kJ/mole and 75 kJ/mole with the proviso that said BF3 affinity is lower than the BF3 affinity of the extractive agent, said organic solvent being chemically stable, and having a boiling point at atmospheric pressure of at least 468K, comprising the steps of (i) contacting a mixture comprising monochloroacetic acid and dichloroacetic acid with the extractive agent, (ii) distilling the mixture obtained in step (i) to obtain a monochloroacetic acid stream and a stream comprising dichloroacetic acid and the extractive agent, (iii) subjecting the stream comprising dichloroacetic acid and the extractive agent to a regeneration step, wherein the organic solvent is contacted with the mixture comprising monochloroacetic acid and dichloroacetic acid of step (i), or wherein the organic solvent is contacted with the mixture obtained in step (i) prior to and/or during step (ii), or wherein the organic solvent is contacted with the stream comprising dichloroacetic acid and the extractive agent obtained in step (ii) prior to or during step (iii), or any combination thereof.
(FR) La présente invention concerne un procédé de séparation d'acide monochloroacétique et d'acide dichloroacétique l'un de l'autre par une distillation extractive au moyen de (a) un agent d'extraction qui est chimiquement stable et qui présente une affinité pour BF3 entre 65 kJ/mole et 110 kJ/mole et (b) un solvant organique qui est, soit un acide présentant un pKa inférieur entre 3,0 et 6,5, soit une base présentant une affinité pour BF3 entre 40 kJ/mole et 75 kJ/mole à condition que ladite affinité pour BF3 soit inférieure à l'affinité pour BF3 de l'agent d'extraction, ledit solvant organique étant chimiquement stable et présentant un point d'ébullition à la pression atmosphérique d'au moins 468 K. Le procédé selon l'invention comprend 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, (ii) distillation du mélange obtenu dans l'étape (i) pour obtenir un flux d'acide monochloroacétique et un flux comprenant l'acide dichloroacétique et l'agent d'extraction, (iii) soumission du flux comprenant l'acide dichloroacétique et l'agent d'extraction à une étape de régénération, le solvant organique étant mis en contact avec le mélange comprenant l'acide monochloroacétique et l'acide dichloroacétique de l'étape (i), ou le solvant organique étant mis en contact avec le mélange obtenu dans l'étape (i) avant et/ou pendant l'étape (ii), ou le solvant organique étant mis en contact avec le flux comprenant l'acide dichloroacétique et l'agent d'extraction obtenu dans l'étape (ii) avant ou pendant l'étape (iii), ou une quelconque combinaison correspondante.
Latest bibliographic data on file with the International Bureau