Treatment of wash water in paint spray booths
US4678586A · kind A · utility
1Cited by
1References
7Claims
0Family size
Inventor
Key dates
| Filing date | Oct 2, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/71
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
To control build-up of paint in the water tank an alkaline liquid containing NaOH is added in quantities to maintain a pH not substantially less than 9, thus preventing corrosion, and a hydroxide ion concentration not exceeding 0.01M. The additive is introduced by a metering pump under the control of a programmed timer over a seven day cycle. Over half the amount to be added in the cycle is introduced as a single discrete dose (preferably before a weekend) and the rest as smaller doses at intervals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.