Molybdate-free sterilizing and pasteurizing solutions
US9873535B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2012 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Dec 28, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B55/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention concerns a composition and method of using non-molybdate corrosion inhibitors in sterilizing and pasteurizing applications. The composition is a blend of one or more components including corrosion inhibitors, surfactants, hydrotropes, polymer dispersants, pH adjusting agents and water. The composition may include two or more of a) alkyl-dicarboxylic acid; b) phosphono-carboxylic acid; c) tri(amino-carboxylic acid); d) anionic polymer dispersant; e) non-ionic surfactant; f) inorganic phosphate; g) phosphonotricarboxylic acid; and h) hydrotrope. Specifically, the composition may comprise sebacic acid, hydroxyphosphonoacetic acid, and 6,6′,6″-(1,3,5-triazine-2,4,6-triyltriimino)tris-hexanoic acid. Optionally, the composition can further comprise a co-polymer of acrylic acid and allyl-2-hydroxy-propyl-sulfonate ether (AA/AHPSE), 2-phosphono-1,2,4-butane-tricarboxylic acid, sodium phosphate monobasic or phosphoric acid, α-decyl-ω-hydroxy-poly(oxy-1,2ethanediyl), and sodium cumenesulfonate. These components are not necessary, and in some embodiments, the composition is utilized without these components. The disclosed composition exhibits comparable or better corrosi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.