Global Patent Index - EP 1848682 A1

EP 1848682 A1 20071031 - PROCESS FOR RECOVERING ORGANIC COMPOUNDS CONTAINED IN (METH)ACRYLIC ACID-CONTAINING MIXTURES BY EXTRACTION WITH A PROTIC SOLVENT

Title (en)

PROCESS FOR RECOVERING ORGANIC COMPOUNDS CONTAINED IN (METH)ACRYLIC ACID-CONTAINING MIXTURES BY EXTRACTION WITH A PROTIC SOLVENT

Title (de)

VERFAHREN ZUR R]CKGEWINNUNG ORGANISCHER VERBINDUNGEN VON (METH)ACRYLS[UREHALTIGEN GEMISCHEN DURCH EXTRAKTION MIT EINEM PROTISCHEN L\SUNGSMITTEL

Title (fr)

PROCEDE POUR RECUPERER DES COMPOSES ORGANIQUES DE MELANGES CONTENANT DE L'ACIDE (METH)ACRYLIQUE PAR EXTRACTION AVEC UN SOLVANT PROTOGENE

Publication

EP 1848682 A1 20071031 (DE)

Application

EP 06706721 A 20060207

Priority

  • EP 2006001077 W 20060207
  • DE 102005005439 A 20050208

Abstract (en)

[origin: WO2006084667A1] A process for preparing (meth)acrylic acid comprises the following steps: (i): bringing a composition<SUB/>Z<SUB>1</SUB> which contains (meth)acrylic acid and aldehyde in contact with an aldehyde collector at a temperature ranging from 10 to 100 °C and a pressure ranging from 0.1 to 10 bar, to produce a composition<SUB/>Z<SUB>2</SUB> which contains (meth)acrylic acid, the high-boiling reaction product from aldehyde and aldehyde collector, and non-reacted aldehyde collector; (ii) separating (meth)acrylic acid from the composition Z<SUB>2</SUB> by distillation, yielding as bottom product a composition Z<SUB>3</SUB> which contains the high-boiling reaction product from the reaction between aldehyde and aldehyde collector, and non-reacted aldehyde collector; (iii) extracting the non-reacted aldehyde collector from the composition Z<SUB>2</SUB> with water, yielding a first aqueous phase P<SUB>1</SUB> and a second organic phase P<SUB>2</SUB>; (iv) separating the first aqueous phase from the second organic phase. Also disclosed is a device for producing (meth)acrylic acid, foams, mouldings, fibres and the like based on (meth)acrylic acid produced by the claimed process, as well as the use in this type of products of the (meth)acrylic acid produced by the claimed process.

IPC 8 full level

B01D 11/04 (2006.01); C07C 51/573 (2006.01); C07C 57/04 (2006.01)

CPC (source: EP US)

B01D 11/0488 (2013.01 - EP US); C07C 51/44 (2013.01 - EP US); C07C 51/48 (2013.01 - EP US); C07C 51/487 (2013.01 - EP US); C07C 51/50 (2013.01 - EP US)

Citation (search report)

See references of WO 2006084667A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

DE 102005005439 A1 20060817; BR PI0607317 A2 20090901; CN 101119959 A 20080206; EP 1848682 A1 20071031; JP 2008529988 A 20080807; US 2008119669 A1 20080522; WO 2006084667 A1 20060817; ZA 200706511 B 20090729

DOCDB simple family (application)

DE 102005005439 A 20050208; BR PI0607317 A 20060207; CN 200680004332 A 20060207; EP 06706721 A 20060207; EP 2006001077 W 20060207; JP 2007553567 A 20060207; US 81563306 A 20060207; ZA 200706511 A 20070806