Global Patent Index - EP 1099782 A1

EP 1099782 A1 2001-05-16 - Installation and process for the electrolytic dissolution of a metal by oxidation

Title (en)

Installation and process for the electrolytic dissolution of a metal by oxidation

Title (de)

Vorrichtung und Verfahren zur elektrolytischen Auflösung durch Oxidation eines Metalles

Title (fr)

Installation et procédé de dissolution électrolytique par oxydation d'un métal.

Publication

EP 1099782 A1 (FR)

Application

EP 00403078 A

Priority

FR 9914186 A

Abstract (en)

Electrolytic metal dissolution apparatus has an electrolytic cell with a soluble anode of base metal and an insoluble cathode. The electrodes are not separated by a membrane and are at least partly immersed in an electrolyte to be enriched by ions of the base metal. The density of the electrolyte near the anode exceeds the density near the cathode by 100 g/l. An Independent claim is included for the production of metal in solution using the above apparatus as above Preferred Features: The density gradient is maintained by a temperature gradient 15 degrees C, the cathode region being hotter. The anode is made of metal granules. The electrolyte is based on sulfonates, sulfuric acid, halogen-based compounds, fluorosilicate or fluoroborate.

Abstract (fr)

L'installation comprend : une cellule d'électrolyse (1") dotée d'une anode soluble (2") et d'une cathode insoluble (3") sans membrane interposée, des moyens pour introduire et prélever du bain dans la cellule, des moyens pour maintenir un gradient de densité de bain dans ladite cellule adapté pour que, si D1 est la densité du bain au voisinage de la cathode et si D2 est la densité du bain au voisinage de l'anode, (D2 - D1) >= 100 g/l. Procédé associé. Grâce à la séparation densitométrique, le métal dissous ne se redépose pas sur la cathode et le rendement global de dissolution est amélioré. <IMAGE>

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

C25D 21/14; B01F 1/00; C25D 3/02; C25D 3/30; C25D 3/32

IPC 8 full level (invention and additional information)

C25C 7/00 (2006.01); C25D 21/14 (2006.01)

CPC (invention and additional information)

C25D 21/14 (2013.01)

Citation (search report)

Designated contracting state (EPC)

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

EPO simple patent family

EP 1099782 A1 20010516; BR 0005371 A 20010807; CA 2325890 A1 20010512; FR 2801062 A1 20010518; FR 2801062 B1 20011228; JP 2001159000 A 20010612; KR 20010051603 A 20010625; US 6361677 B1 20020326

INPADOC legal status


2003-08-13 [18W] WITHDRAWN

- Effective date: 20030621

2002-02-13 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2001-07-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010517

2001-05-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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

2001-05-16 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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