Global Patent Index - EP 0984899 A1

EP 0984899 A1 2000-03-15 - METHOD FOR PREPARING AN ULTRAPURE HYDROGEN PEROXIDE SOLUTION BY ION EXCHANGE WITH AN ANIONIC-CATIONIC-ANIONIC-CATIONIC SEQUENCE

Title (en)

METHOD FOR PREPARING AN ULTRAPURE HYDROGEN PEROXIDE SOLUTION BY ION EXCHANGE WITH AN ANIONIC-CATIONIC-ANIONIC-CATIONIC SEQUENCE

Title (de)

VERFAHREN ZUR HERSTELLUNG EINER HOCHREINEN WASSERSTOFFPEROXIDLÖSUNG MITTELS IONENAUSTAUSCH IN DER REIHENFOLGE: ANIONISCH - KATIONISCH - ANIONISCH - KATIONISCH

Title (fr)

PROCEDE DE PREPARATION D'UNE SOLUTION ULTRA-PURE DE PEROXYDE D'HYDROGENE PAR ECHANGE IONIQUE SEQUENCE: ANIONIQUE-CATIONIQUE-ANIONIQUE-CATIONIQUE

Publication

EP 0984899 A1 (FR)

Application

EP 98928366 A

Priority

  • FR 9801057 W
  • FR 9706470 A

Abstract (en)

[origin: FR2763930A1] The invention concerns a method for preparing an ultrapure hydrogen peroxide solution, characterised in that it comprises a sequence which involves successively passing said solution on at least four beds of cation-exchanging adsorbents (AEC) and anion-exchanging adsorbents (AEA) following the sequence: AEA } AEC } AEA } AEC.

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

C01B 15/013; B01J 39/04

IPC 8 full level (invention and additional information)

B01J 39/04 (2006.01); B01J 41/04 (2006.01); C01B 15/013 (2006.01)

CPC (invention and additional information)

C01B 15/0135 (2013.01)

Citation (search report)

See references of WO 9854087A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

FR 2763930 A1 19981204; FR 2763930 B1 19990730; AU 8022798 A 19981230; EP 0984899 A1 20000315; JP 2002500611 A 20020108; KR 20010013062 A 20010226; TW 445174 B 20010711; US 5961947 A 19991005; US 6214225 B1 20010410; WO 9854087 A1 19981203

INPADOC legal status


2002-09-04 [18W] WITHDRAWN

- Date of withdrawal: 20020709

2002-04-24 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: L'AIR LIQUIDE, S.A. A DIRECTOIRE ET CONSEIL DE SUR

2000-08-09 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000623

2000-03-15 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991227

2000-03-15 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT