Process for separating silicic compounds from cleaning baths and plant for its application
US5296001A · kind A · utility
0Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1993 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Mar 11, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/01
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The subject of the invention is a process for separating silicic compounds from baths for cleaning steel substrates containing iron ions and silicic compounds, consisting of the following stages: PA0 a) a concentrated spent cleaning bath is cooled in a controlled manner to a temperature below 60.degree. C. so as to precipitate the silicic compounds, PA0 b) the cleaning bath is allowed to cool for at least 2 hours, PA0 c) the cleaning bath is reheated, PA0 d) the silicic compounds precipitated from the cleaning bath are separated off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.