Global patent index - EP 0991611 A1

EP 0991611 A1 2000-04-12 - METHOD FOR CONSOLIDATING AND/OR PASSIVATING, BY CHEMICAL PROCESS, A POROUS MINERAL STRUCTURE INTERNAL ZONE CONTAINING AN ALKALINE-EARTH METAL CARBONATE

Title (en)

METHOD FOR CONSOLIDATING AND/OR PASSIVATING, BY CHEMICAL PROCESS, A POROUS MINERAL STRUCTURE INTERNAL ZONE CONTAINING AN ALKALINE-EARTH METAL CARBONATE

Title (de)

VERFAHREN ZUR VERFESTIGUNG UND/ODER PASSIVIERUNG DES INNEREN BEREICHES EINER CARBONATHALTIGEN PORÖSEN MINERALISCHEN STRUKTUR AUF CHEMISCHEM WEGE

Title (fr)

PROCEDE DE CONSOLIDATION ET/OU DE PASSIVATION, PAR VOIE CHIMIQUE, D'UNE ZONE INTERNE D'UNE STRUCTURE MINERALE POREUSE CONTENANT UN CARBONATE D'UN METAL ALCALINO-TERREUX

Publication

EP 0991611 A1 (FR)

Application

EP 99914618 A

Priority

  • FR 9900923 W
  • FR 9805071 A

Abstract (en)

[origin: FR2777883A1] Consolidating and/or passivating an internal zone of a porous mineral structure containing an alkaline-earth metal carbonate by chemical process consists of injecting a fluoride ion source with a pH not less than 8 into the volume of the zone of the structure to transform part of the alkaline-earth metal carbonate into alkaline-earth metal fluoride, especially calcium present in the structure zone.

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

C04B 41/50; C04B 41/52; C09K 7/02; E21B 43/02

IPC 8 full level (invention and additional information)

C04B 41/50 (2006.01); C04B 41/66 (2006.01); C09K 8/16 (2006.01)

CPC (invention and additional information)

C09K 8/16 (2013.01); C04B 41/5018 (2013.01); C04B 41/66 (2013.01); C09K 8/572 (2013.01)

Citation (search report)

See references of WO 9955641A1

Designated contracting state (EPC)

DK FR GB NL

EPO simple patent family

FR 2777883 A1 19991029; EP 0991611 A1 20000412; NO 996455 A 20000207; NO 996455 D0 19991223; WO 9955641 A1 19991104

INPADOC legal status

2002-03-13 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20010807

2001-05-09 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010327

2000-04-12 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991224

2000-04-12 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DK FR GB NL