(19)
(11) EP 1 438 264 A1

(12)

(43) Date of publication:
21.07.2004 Bulletin 2004/30

(21) Application number: 02782203.0

(22) Date of filing: 22.10.2002
(51) International Patent Classification (IPC)7C02F 1/66, C02F 1/52
(86) International application number:
PCT/US2002/033775
(87) International publication number:
WO 2003/035557 (01.05.2003 Gazette 2003/18)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 25.10.2001 US 353359 P
21.02.2002 US 82841
21.02.2002 US 82564

(71) Applicant: IMC Global Operations Inc.
Lake Forest, IL 60045 (US)

(72) Inventors:
  • MICHALSKI, Dennis, H.
    Lakeland, FL 33813 (US)
  • JARDINE, Kenneth, J.
    Lakeland, FL 33803 (US)
  • ASTLEY, Vaughn, V.
    Lakeland, FL 33813 (US)

(74) Representative: Huber, Arnulf 
Uexküll & Stolberg,Patentanwälte,Beselerstrasse 4
22607 Hamburg
22607 Hamburg (DE)

   


(54) PURIFICATION OF PHOSPHORIC ACID PLANT POND WATER