General purpose aqueous cleaner
US5834411A · kind A · utility
30Cited by
36References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Sep 5, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D2111/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous metal cleaning composition is provided which comprises an alkalinity providing agent such as alkali metal carbonate and/or bicarbonate salts and a low foaming surfactant. The aqueous cleaning solution has specific foam height and foam collapse characteristics, and provides for substantially complete phase separation of a contaminant phase from the aqueous cleaning composition such that there is substantially no aqueous phase drag out into the contaminant phase; and the contaminant phase can be removed easily, and the aqueous cleaning solution can be recovered and reused.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.