EP 1499457 A4 20051228 - METHODS OF SIMULTANEOUSLY CLEANING AND DISINFECTING INDUSTRIAL WATER SYSTEMS
Title (en)
METHODS OF SIMULTANEOUSLY CLEANING AND DISINFECTING INDUSTRIAL WATER SYSTEMS
Title (de)
VERFAHREN ZUR GLEICHZEITIGEN REINIGUNG UND DESINFEKTION VON BRAUCHWASSERSYSTEMEN
Title (fr)
PROCEDE DE NETTOYAGE ET DE DESINFECTION SIMULTANES DE SYSTEMES D'APPROVISIONNEMENT EN EAU INDUSTRIELLE
Publication
Application
Priority
- US 0313219 W 20030429
- US 13531702 A 20020430
- US 40922003 A 20030408
Abstract (en)
[origin: WO03092919A1] On-line and Off-line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. An alternative method involves the use of a chelating agent and a biocide. Other possible cleaning and disinfection reagents may be added as needed including corrosion inhibitors, chelating agents, biocides, surfactants and reducing agents. These cleaning and disinfecting methods work in a variety of industrial water systems including cooling water and boiler water systems.
IPC 1-7
B08B 9/00; B08B 9/027; B08B 3/00; B08B 3/14; B08B 7/00; C03C 23/00; C23G 1/00; C23G 1/02; A61L 2/16; A61L 2/18; A01N 59/08
IPC 8 full level
A01N 59/08 (2006.01); A61L 2/16 (2006.01); A61L 2/18 (2006.01); A61L 2/20 (2006.01); B08B 9/00 (2006.01); B08B 9/02 (2006.01); B08B 9/08 (2006.01); C02F 1/50 (2006.01); C09K 8/52 (2006.01); C11D 3/395 (2006.01); C11D 7/08 (2006.01); C11D 7/26 (2006.01); C11D 11/00 (2006.01); F28G 9/00 (2006.01); C02F 1/66 (2006.01); C02F 9/00 (2006.01)
CPC (source: EP)
A61L 2/16 (2013.01); A61L 2/18 (2013.01); A61L 2/20 (2013.01); A61L 9/145 (2013.01); B08B 9/00 (2013.01); B08B 9/032 (2013.01); B08B 9/08 (2013.01); C02F 1/50 (2013.01); C09K 8/52 (2013.01); C11D 3/3956 (2013.01); C11D 7/08 (2013.01); C11D 7/265 (2013.01); F28G 9/00 (2013.01); A61L 2202/17 (2013.01); C02F 1/66 (2013.01); C02F 9/00 (2013.01); C02F 2103/023 (2013.01); C02F 2303/04 (2013.01); C02F 2303/08 (2013.01); C11D 2111/20 (2024.01); F28F 2265/20 (2013.01)
Citation (search report)
- [X] US 3867509 A 19750218 - GEIGER FRIEDHELM, et al
- [X] DE 3403631 A1 19840830 - BERGER PETER
- [A] US 4157300 A 19790605 - HAFNER VOLKER [DE], et al
- See references of WO 03092919A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 03092919 A1 20031113; AU 2003223762 A1 20031117; AU 2003223762 B2 20081204; BR 0309652 A 20050301; CA 2484029 A1 20031113; EP 1499457 A1 20050126; EP 1499457 A4 20051228; MX PA04010730 A 20050307; NZ 536168 A 20071130
DOCDB simple family (application)
US 0313219 W 20030429; AU 2003223762 A 20030429; BR 0309652 A 20030429; CA 2484029 A 20030429; EP 03719966 A 20030429; MX PA04010730 A 20030429; NZ 53616803 A 20030429