Global Patent Index - EP 1159060 A2

EP 1159060 A2 2001-12-05 - MULTILAYER MEMBRANES AND METHOD FOR THE PRODUCTION THEREOF

Title (en)

MULTILAYER MEMBRANES AND METHOD FOR THE PRODUCTION THEREOF

Title (de)

MEHRSCHICHTMEMBRANEN UND VERFAHREN ZU IHRER HERSTELLUNG

Title (fr)

MEMBRANES MULTICOUCHES ET LEUR PROCEDE DE FABRICATION

Publication

EP 1159060 A2 (DE)

Application

EP 00922423 A

Priority

  • DE 0000707 W
  • DE 19909841 A

Abstract (en)

[origin: DE19909841A1] The invention applies to the fields of chemistry and relates to multilayer membranes, such as those used, for example, to separate aqueous alcohol mixtures by means of pervaporation. The aim of the invention is to provide a multilayer membrane having a defect-free, separation-active layer and exhibiting a high separation capacity. To this end, the invention provides multilayer membranes consisting of a dense or microporous supporting material and of at least one single layer which is applied thereto and which is attached to the supporting material by polyelectrolyte complexes, whereby few single layers are applied and the first single layer predominantly covers the surface of the supporting material. The aim of the invention is also accomplished by using a method for producing multilayer membranes in which at least one single layer consisting of at least one anionic polyelectrolyte material or, alternatively, of at least one cationic polyelectrolyte material or of at least one non-stoichiometric polyelectrolyte complex is applied to a dense or microporous supporting material which is functionalized with ionic and/or ionizable groups.

IPC 1-7 (main, further and additional classification)

B01D 69/12; B01D 53/22; B01D 61/36

IPC 8 full level (invention and additional information)

B01D 61/36 (2006.01); B01D 69/10 (2006.01); B01D 69/12 (2006.01); B01D 71/80 (2006.01)

CPC (invention and additional information)

B01D 61/362 (2013.01); B01D 69/10 (2013.01); B01D 69/12 (2013.01); B01D 71/80 (2013.01)

Citation (search report)

See references of WO 0053296A3

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19909841 A1 20000907; AU 4284500 A 20000928; DE 10080521 D2 20020725; EP 1159060 A2 20011205; WO 0053296 A2 20000914; WO 0053296 A3 20001228

INPADOC legal status


2006-04-05 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20050830

2005-03-30 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: LEIBNIZ-INSTITUT FUER POLYMERFORSCHUNG DRESDEN E.V

2001-12-05 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010816

2001-12-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-12-05 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI