Global patent index - EP 1089951 A1

EP 1089951 A1 2001-04-11 - A METHOD FOR PRODUCING NANO-ENGINEERED PRECURSORS

Title (en)

A METHOD FOR PRODUCING NANO-ENGINEERED PRECURSORS

Title (de)

VERFAHREN ZUR HERSTELLUNG NANOSTRUKTURIERTEN VORSTUFEN

Title (fr)

PROCEDE DE PRODUCTION DE PRECURSEURS A L'ECHELLE NANOMETRIQUE

Publication

EP 1089951 A1 (EN)

Application

EP 00915656 A

Priority

  • SE 0000429 W
  • SE 9900759 A

Abstract (en)

[origin: WO0051948A1] A method for producing nano-engineered precursors, in particular superconductor precursors is disclosed, said method comprising the steps of: dissolving at least two metal compounds, precipitating agents and optionally pH-adjusting agents to form feed solutions (60) of known concentrations; mixing the feed solutions (60) by adding them, preferably into a reactor (70); co-precipitating a solid from the mixed solutions (60), preferably in the reactor (70) under controlled operating conditions; thickening the co-precipitated solid; separating the precipitated solid from the mother liquor, for instance by filtration, which mother liquor preferably is recycled to the reactor (70), and; optionally washing the solid during filtration to remove impurities; wherein said at least two metal compounds are dissolved to form separate solutions (40, 50) before being mixed together. The co-precipitated solid is then filtered, washed, dried and calcined to obtain a desired super conducting oxide.

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

C04B 35/45; H01L 39/24

IPC 8 full level (invention and additional information)

C01B 13/18 (2006.01); C01G 21/00 (2006.01); C01G 29/00 (2006.01)

CPC (invention and additional information)

B82Y 30/00 (2013.01); C01B 13/185 (2013.01); C01G 21/006 (2013.01); C01G 29/006 (2013.01); C01P 2004/64 (2013.01)

Citation (search report)

See references of WO 0051948A1

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

WO 0051948 A1 20000908; AU 3688100 A 20000921; EP 1089951 A1 20010411; SE 9900759 D0 19990302

INPADOC legal status

2004-03-10 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030905

2003-04-09 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20030225

2001-04-11 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001201

2001-04-11 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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