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1. WO2013182499 - DEHYDRATION OF DILUTIONS OF COMPOUNDS FORMING AN AZEOTROPE WITH WATER

Publication Number WO/2013/182499
Publication Date 12.12.2013
International Application No. PCT/EP2013/061335
International Filing Date 03.06.2013
IPC
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
3
Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
3
Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
14
Fractional distillation
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
3
Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
34
with one or more auxiliary substances
36
Azeotropic distillation
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
3
Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
34
with one or more auxiliary substances
40
Extractive distillation
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
17
Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
12
Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits
B01D 3/00 (2006.01)
B01D 3/14 (2006.01)
B01D 3/36 (2006.01)
B01D 3/40 (2006.01)
B01D 17/12 (2006.01)
CPC
B01D 3/002
B01D 3/141
B01D 3/36
C07C 29/82
Applicants
  • AKZO NOBEL CHEMICALS INTERNATIONAL B.V. [NL/NL]; Stationsstraat 77 NL-3811 MH Amersfoort, NL
Inventors
  • KISS, Anton Alexandru; NL
Agents
  • AKZO NOBEL IP DEPARTMENT; Velperweg 76 NL-6824 BM Arnhem, NL
Priority Data
12170856.405.06.2012EP
61/655,59705.06.2012US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DEHYDRATION OF DILUTIONS OF COMPOUNDS FORMING AN AZEOTROPE WITH WATER
(FR) DÉSHYDRATATION DE DILUTIONS DE COMPOSÉS FORMANT UN AZÉOTROPE AVEC L'EAU
Abstract
(EN)
A process and a column configuration for dehydration of an aqueous dilution of a compound forming an azeotrope with water, such as raw grade bioethanol, formic acid or chloroform, to form a concentrate with a concentration above azeotropic level. A preconcentration section (26, 40, 55) with a reboiler (29, 42, 57) and an extractive distillation section (22, 41, 52) are thermally coupled. The aqueous dilution is fed to the preconcentration section, where it is separated into water and a preconcentrate. The water is discharged via the reboiler, and the preconcentrate is fed to the extractive distillation section. A solvent is fed to the extractive distillation section at a higher level than the preconcentrate. In the extractive distillation section the final concentrate is separated from a mixture of the solvent and water.
(FR)
L'invention porte sur un procédé et une configuration de colonne pour la déshydratation d'une dilution aqueuse d'un composé formant un azéotrope avec l'eau, tel que le bioéthanol de qualité brute, l'acide formique ou le chloroforme, pour former un concentré ayant une concentration au-dessus du niveau azéotropique. Une section de préconcentration (26, 40, 55) comprenant un rebouilleur (29, 42, 57) et une section de distillation extractive (22, 41, 52) sont thermiquement couplées. La dilution aqueuse est introduite dans la section de préconcentration, où elle est séparée en eau et en un préconcentré. L'eau est évacuée par l'intermédiaire du rebouilleur et le préconcentré est introduit dans la section de distillation extractive. Un solvant est introduit dans la section de distillation extractive à un niveau supérieur à celui du préconcentré. Dans la section de distillation extractive le concentré final est séparé d'un mélange du solvant et de l'eau.
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