Global Patent Index - EP 1094989 A1

EP 1094989 A1 2001-05-02 - SEQUESTERING METHOD AND AGENTS FOR CARRYING OUT SAID METHOD

Title (en)

SEQUESTERING METHOD AND AGENTS FOR CARRYING OUT SAID METHOD

Title (de)

SEQUESTRIERVERFAHREN UND MITTEL ZU SEINER DURCHFÜHRUNG

Title (fr)

PROCEDE DE SEQUESTRATION ET AGENTS POUR SA MISE EN OEUVRE

Publication

EP 1094989 A1 (DE)

Application

EP 99929162 A

Priority

  • DE 19826969 A
  • EP 9903981 W

Abstract (en)

[origin: DE19826969A1] According to the inventive sequestering method, iron ions are used in addition to normal sequestering agents which in hypostoichiometric quantities, are able to delay the precipitation of the constituents of water hardness from process water and aqueous solutions. In this way, the precipitation of constituents of water hardness can be reduced considerably. The sequestering agents can optionally be used in the form of concentrates which also contain iron salts.

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

C02F 5/14; C02F 5/10; C02F 5/12

IPC 8 full level (invention and additional information)

C02F 5/10 (2006.01)

CPC (invention and additional information)

C02F 5/105 (2013.01)

Citation (search report)

See references of WO 9965831A1

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IE IT LI NL SE

EPO simple patent family

DE 19826969 A1 19991223; EP 1094989 A1 20010502; WO 9965831 A1 19991223

INPADOC legal status


2002-09-18 [18W] APPLICATION WITHDRAWN

- Date of withdrawal: 20020724

2002-07-03 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020523

2002-06-05 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: ECOLAB GMBH & CO. OHG

2001-05-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001211

2001-05-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FR GB GR IE IT LI NL SE