Washwater neutralization system for glass forming line
US7251959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2002 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Apr 25, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A neutralization system for controlling the pH of the washwater used to clean and maintain polyacrylic bound glass forming equipment. The neutralization system introduces a base solution to a washwater solution when the pH of the washwater solution contained in a closed loop washwater recovery system falls below about 8.5, thereby substantially reducing the corrosion rate of the components of the equipment associated with acidic polyacrylic acid binder, maleic acid cobinder or maleic anhydride cobinder and washwater solution. A closed-loop hoodwall washwater recovery system may also be introduced in addition to the neutralization system that allows for the recovery and reuse of polyacrylic acid binder and maleic acid cobinder or maleic anhydride cobinder with a minimal amount of base solution, thereby minimizing degradation of insulation properties of polyacylic acid bound glass fiber products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.