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1. WO2020109739 - PURIFICATION OF AQUEOUS SOLUTIONS CONTAINING FORMALDEHYDE AND USE OF THE PURIFIED SOLUTION IN AN ACRYLIC ACID PRODUCTION PROCESS

Publication Number WO/2020/109739
Publication Date 04.06.2020
International Application No. PCT/FR2019/052840
International Filing Date 29.11.2019
IPC
C07C 45/83 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
45Preparation of compounds having C=O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
78Separation; Purification; Stabilisation; Use of additives
81by change in the physical state, e.g. crystallisation
82by distillation
83by extractive distillation
C07C 47/04 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
47Compounds having -CHO groups
02Saturated compounds having -CHO groups bound to acyclic carbon atoms or to hydrogen
04Formaldehyde
C07C 45/35 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
45Preparation of compounds having C=O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
27by oxidation
32with molecular oxygen
33of CHx-moieties
34in unsaturated compounds
35in propene or isobutene
C07C 51/235 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
16by oxidation
21with molecular oxygen
23of oxygen-containing groups to carboxyl groups
235of -CHO groups or primary alcohol groups
C07C 51/46 2006.01
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 51/48 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
42Separation; Purification; Stabilisation; Use of additives
48by liquid-liquid treatment
CPC
B01D 3/141
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
3Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
14Fractional distillation ; or use of a fractionation or rectification column
141where at least one distillation column contains at least one dividing wall
B01D 3/40
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
3Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
34with one or more auxiliary substances
40Extractive distillation
C02F 1/048
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
02by heating
04by distillation or evaporation
048Purification of waste water by evaporation
C07C 45/35
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
45Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
27by oxidation
32with molecular oxygen
33of CHx-moieties
34in unsaturated compounds
35in propene or isobutene
C07C 45/83
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
45Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
78Separation; Purification; Stabilisation; Use of additives
81by change in the physical state, e.g. crystallisation
82by distillation
83by extractive distillation
C07C 51/235
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
16by oxidation
21with molecular oxygen
23of oxygen-containing groups to carboxyl groups
235of —CHO groups or primary alcohol groups
Applicants
  • ARKEMA FRANCE [FR]/[FR]
Inventors
  • TRETJAK, Serge
  • FAUCONET, Michel
  • LEVRAY, Andre
Agents
  • ALBANI, Dalila
Priority Data
187205929.11.2018FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) PURIFICATION OF AQUEOUS SOLUTIONS CONTAINING FORMALDEHYDE AND USE OF THE PURIFIED SOLUTION IN AN ACRYLIC ACID PRODUCTION PROCESS
(FR) PURIFICATION DE SOLUTIONS AQUEUSES CONTENANT DU FORMALDEHYDE, ET UTILISATION DE LA SOLUTION PURIFIEE DANS UN PROCEDE DE PRODUCTION D'ACIDE ACRYLIQUE
Abstract
(EN)
The present invention relates to a process for treating aqueous effluents containing formaldehyde by distillation in the presence of acetic acid, in particular to a process for treating aqueous solutions resulting from the synthesis of acrylic acid. The invention also relates to the use of the purified aqueous solution in a process for producing acrylic acid by catalytic oxidation of propylene and/or propane in steam dilution.
(FR)
La présente invention concerne un procédé de traitement d'effluents aqueux contenant du formaldéhyde, par distillation en présence d'acide acétique, notamment un procédé de traitement de solutions aqueuses issues de la synthèse d'acide acrylique. L'invention a trait aussi à l'utilisation de la solution aqueuse purifiée dans un procédé de production d'acide acrylique par oxydation catalytique de propylène et/ou propane en dilution vapeur.
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