Molybdate-free sterilizing and pasteurizing solutions

• Main Authors: Meskers, Jr. Donald A, Scheidel Peter, Liu Zhendong
• Format: Patent
• Language: English
• Published: 23.01.2018
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CONVEYING; DIFFUSION TREATMENT OF METALLIC MATERIAL; FISHING; FORESTRY; HANDLING THIN OR FILAMENTARY MATERIAL; HUMAN NECESSITIES; HUNTING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PACKING; PERFORMING OPERATIONS; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; STORING; TRANSPORTING; TRAPPING; UNPACKING

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 corrosion protection performance than conventional molybdate containing sterilizing products.