Invention Grant
- Patent Title: Use of an aqueous neutral cleaning solution and method for removing rouging from stainless steel surfaces
- Patent Title (中): 使用水性中性清洁溶液和从不锈钢表面除去粗糙的方法
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Application No.: US12565376Application Date: 2009-09-23
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Publication No.: US08192550B2Publication Date: 2012-06-05
- Inventor: Marc Philippe Vernier
- Applicant: Marc Philippe Vernier
- Applicant Address: CH Rheinfelden
- Assignee: Ateco Services AG
- Current Assignee: Ateco Services AG
- Current Assignee Address: CH Rheinfelden
- Agency: Johnson, Marcou & Isaacs, LLC
- Agent F. Brent Nix
- Priority: EP08150974 20080201; EP09167155 20090804
- Main IPC: C23G1/00
- IPC: C23G1/00 ; C23G1/24

Abstract:
The invention relates to a method for removing films and deposits from stainless surfaces, especially from stainless metallic surfaces such as they are used in process stations and production units in the pharmaceutical, food and biotechnological industries, and to an aqueous cleaning solution comprising a reducing agent, in particular dithionite and/or disulfite, and at least two different complexing agents, wherein one of these complexing agents is a compound comprising diacetic acid groups or a salt thereof, for removing rouging on surfaces of stainless steels that come into contact with media selected from the group of chromium/nickel and chromium/nickel/molybdenum steels in the neutral pH range.
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Information query