Title:
ALKALINE SENSITIVE METAL CLEANING COMPOSITION, METHOD FOR CLEANING AN ALKALINE SENSITIVE METAL SURFACE, AND WASHING FACILITY
Document Type and Number:
WIPO Patent Application WO2003078691
Kind Code:
A3
Abstract:
An alkaline sensitive metal cleaning composition is provided. The alkaline sensitive metal cleaning composition contains an alkaline concentrate and a corrosion inhibitor concentrate. The alkaline concentrate includes a source of alkalinity in an amount sufficient to provide a use solution having a pH of at least 10.0, and a first chelant component that exhibits soil removal properties when used at a pH of at least 10.0. The corrosion inhibitor concentrate includes a corrosion inhibitor component for reducing corrosion of alkaline sensitive metals when used in a use solution having a pH of at least 10.0, a second chelant component for stabilizing the corrosion inhibitor in the corrosion inhibitor concentrate when the corrosion inhibitor concentrate is provided at a pH that is less than 8.0, and a surfactant component for providing cleaning properties when used at a pH of at least 10.0. A threshold inhibitor/crystal modifier can be provided in at least one of the alkaline concentrate and the corrosion inhibitor concentrate to stabilize the corrosion inhibitor in a use solution at a pH of at least 10.0. A method for cleaning an alkaline sensitive metal surface and a washing facility are provided.
Inventors:
HOYT JERRY D
BESSE MICHAEL E
KLOS TERRY J
LEVITT MARK
RUHR RICHARD O
BESSE MICHAEL E
KLOS TERRY J
LEVITT MARK
RUHR RICHARD O
Application Number:
PCT/US2003/006655
Publication Date:
November 04, 2004
Filing Date:
March 05, 2003
Export Citation:
Assignee:
ECOLAB INC (US)
International Classes:
C11D3/02; C11D11/00; C23G1/20; C23G1/22; (IPC1-7): C23G1/22; C23G1/16; C11D3/02; C11D11/00
Domestic Patent References:
| WO1998029527A1 | 1998-07-09 | |||
| WO1996029451A1 | 1996-09-26 | |||
| WO1998020103A1 | 1998-05-14 | |||
| WO1998038269A1 | 1998-09-03 | |||
| WO1999020734A1 | 1999-04-29 |
Foreign References:
| US3687858A | 1972-08-29 | |||
| US5030378A | 1991-07-09 | |||
| US4507219A | 1985-03-26 | |||
| US5622569A | 1997-04-22 |
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