Global Patent Index - EP 1042753 A1

EP 1042753 A1 2000-10-11 - METHOD FOR PACKAGING INDUSTRIAL, IN PARTICULAR RADIOACTIVE, WASTE IN APATITE CERAMICS

Title (en)

METHOD FOR PACKAGING INDUSTRIAL, IN PARTICULAR RADIOACTIVE, WASTE IN APATITE CERAMICS

Title (de)

VERFAHREN ZUR KONDITIONIERUNG VON INDUSTRIEABFÄLLEN, INSBESONDERE RADIOAKTIVE PRODUKTE, IN APATIT- KERAMIK

Title (fr)

PROCEDE DE CONDITIONNEMENT DE DECHETS INDUSTRIELS, NOTAMMENT RADIOACTIFS, DANS DES CERAMIQUES APATITIQUES

Publication

EP 1042753 A1 (FR)

Application

EP 98963592 A

Priority

  • FR 9802826 W
  • FR 9716356 A

Abstract (en)

[origin: FR2772651A1] Industrial waste is immobilized in an apatite ceramic matrix by introducing the waste into a homogeneous powder mixture of composition corresponding to a substituted hydroxyapatite, compacting and hydrothermally treating. Industrial waste is immobilized in an apatite ceramic matrix by (a) preparing a homogeneous powder mixture of calcium phosphates selected from Ca(H2PO4)2, Ca(H2PO4)2.H2O, CaHPO4, CaHPO4.2H2O, alpha - or beta -Ca3(PO4)2 in amorphous or apatite form and Ca4(PO4)2O, optionally together with a compound selected from alkali and alkaline earth metal phosphates, silicates, carbonates, nitrates, halides, oxides and hydroxides and silicon oxide, in quantities corresponding to formation of a hydroxyapatite of formula Ca10(PO4)6 (OH)2 in which Ca atoms may be partially replaced by atoms of alkali and/or alkaline earth metals other than Ca, the phosphate anions may be partially replaced by silicate anions and the OH anions may be partially replaced by halide anions; (b) introducing the waste into the mixture; (c) compacting at 100-500 MPa and at ambient temperature; and (d) hydrothermally treating the compacted piece in a sealed chamber containing an aqueous medium at 100-500 deg C for \-8 hr.

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

G21F 9/30; B09B 3/00; C04B 18/04; C04B 28/34

IPC 8 full level (invention and additional information)

A62D 3/33 (2007.01); B09B 3/00 (2006.01); C04B 18/04 (2006.01); C04B 28/34 (2006.01); G21F 9/16 (2006.01); G21F 9/30 (2006.01); A62D 101/43 (2007.01); A62D 101/49 (2007.01)

CPC (invention and additional information)

A62D 3/33 (2013.01); G21F 9/302 (2013.01); A62D 2101/43 (2013.01); A62D 2101/49 (2013.01)

Citation (search report)

See references of WO 9934370A1

Designated contracting state (EPC)

BE CH DE ES GB LI SE

EPO simple patent family

FR 2772651 A1 19990625; FR 2772651 B1 20000128; CA 2315919 A1 19990708; CA 2315919 C 20071113; DE 69830614 D1 20050721; DE 69830614 T2 20060511; EP 1042753 A1 20001011; EP 1042753 B1 20050615; ES 2244105 T3 20051201; JP 2002500371 A 20020108; US 6459010 B1 20021001; WO 9934370 A1 19990708

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2005-06-08 [RIN1] INVENTOR (CORRECTION)

- Inventor name: CARPENA, JOELLE

2005-06-08 [RIN1] INVENTOR (CORRECTION)

- Inventor name: DONAZZON, BENOIT

2005-06-08 [RIN1] INVENTOR (CORRECTION)

- Inventor name: LACOUT, JEAN-LOUIS

2005-06-08 [RIN1] INVENTOR (CORRECTION)

- Inventor name: DECHAMBRE, GERARD

2005-02-02 [RIN1] INVENTOR (CORRECTION)

- Inventor name: CARPENA, JOELLE

2005-02-02 [RIN1] INVENTOR (CORRECTION)

- Inventor name: DONAZZON, BENOIT

2005-02-02 [RIN1] INVENTOR (CORRECTION)

- Inventor name: LACOUT, JEAN-LOUIS

2005-02-02 [RIN1] INVENTOR (CORRECTION)

- Inventor name: DECHAMBRE, GERARD

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