Patent Number CA2235712 A1 1997-06-19
 
Method for desalinating and demineralising solutions containing acids and/or metal salts
A method for desalinating, demineralising and optionally crystallising solutions containing acids and/or metal salts, comprising the steps of (a) conditioning pre-clarified solutions using a chemical reagent that inhibits salt precipitation, then optionally filtering the solutions; (b) concentrating the salts in a supersaturated brine that represents a 5-80 % fraction of the flow of solution to be treated; and (c) reducing and possibly neutralising the precipitation inhibiting effect in said brine, and precipitating out the crystallisable salts supersaturating the concentrated fraction.
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FamPat family
Publication Number Type Publi.Date Links
  EP0904253 A1 1999-03-31
STG: (A1) Application published with search report
AP: 1996EP-0941068
  EP0904253 B1 2001-05-02
STG: (B1) Patent specification
AP: 1996EP-0941068
  US6036867 A 2000-03-14
STG: (A) Patents Granted before 2001-04-15
AP: 1996US-09043828
PCT  WO97/21632 A1 1997-06-19
STG: (A1) Published application with search report
AP: 1996WO-FR01878
  FR2742429 A1 1997-06-20
STG: (A1) Application for patent of invention, (first publ.)
AP: 1995FR-0014775
  FR2742430 A1 1997-06-20
STG: (A1) Application for patent of invention, (first publ.)
AP: 1996FR-0004195
  FR2742429 B1 1998-02-20
STG: (B1) Patent of invention (second publication)
AP: 1995FR-0014775
  FR2742430 B1 1998-09-04
STG: (B1) Patent of invention (second publication)
AP: 1996FR-0004195
  DE904253 T1 1999-08-19
STG: (T1) Trans. of EP claims (EPTD)
AP: 1996DE-0941068
  DE69612674 D1 2001-06-07
STG: (D1) Grant (no unexamined application published) patent law 81
AP: 1996DE-6012674
  DE69612674 T2 2001-08-16
STG: (T2) Trans. of EP patent
AP: 1996DE-6012674
  CA2235712 A1 1997-06-19
STG: (A1) Application laid open
AP: 1996CA-2235712
  CA2235712 C 2006-08-29
STG: (C) Patent (second level)
AP: 1996CA-2235712
  ES2128282 T1 1999-05-16
STG: (T1) Transl. of the claims with drawings of European applications (former A4) from 1992
AP: 1996ES-0941068T
  ES2128282 T3 2001-06-16
STG: (T3) Translation of granted European patent (former B3)
AP: 1996ES-0941068T
  PT904253 E 2001-08-30
STG: (E) Availability of national translation of European patent
AP: 1996PT-0941068T
First Date of Grant 2001-05-02
2000-03-14
1998-02-20
1998-09-04
2001-06-07
2001-06-16
2001-08-30
2006-08-29
Inventor JOGAND HENRI
PERON PIERRE-ALAIN
All applicant/assignee DEGREMONT ([FR])
DEGREMONT ([FR])
Degremont ([FR])
DEGREMONT ([FR])
DEGREMONT (Société anonyme) ([FR])
DEGREMONT
DEGREMONT (Société anonyme) ([FR])
DEGREMONT ([FR])
DEGREMONT
DEGREMONT, RUEIL-MALMAISON
DEGREMONT, RUEIL-MALMAISON
DEGREMONT
DEGREMONT
DEGREMONT
DEGREMONT ([FR])
DEGREMONT ([FR])
Priority Details 1995FR-0014775 1995-12-131996FR-0004195 1996-04-031996WO-FR01878 1996-11-27
Designated States Contracting States: BE CH DE ES FR GB IT LI NL PT
National States: CA US
EPO: AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE
   
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