Process for avoiding foaming during cleaning of metal salts of intermediate length carboxylic acids from surfaces
Patent 6425955 Issued on July 30, 2002. Estimated Expiration Date: 
April 26, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 26, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3607482 Regeneration of aqueous degreasing and cleaning solutions Composition and process for cleaning metals Method for removal of surface contaminants from metal substrates Stabilization of silicate solutions Pumpable alkaline cleaning concentrates Patent #: 5520841 InventorsApplicationNo. 530244 filed on 04/26/2000US Classes:134/2, For metallic, siliceous, or calcareous basework, including chemical bleaching, oxidation or reduction134/10, Including regeneration, purification, recovery or separation of agent used134/13, By crystallizing, precipitating, or eliminating dissolved solids from used agent134/26, Using sequentially applied treating agents134/29, One a soap or an alkaline agent510/248, Free element component (e.g., metal, carbon, sulfur, etc.)510/252With alkali metal hydroxide, carbonate, or bicarbonate componentExaminersPrimary: Carrillo, SharidanAttorney, Agent or FirmForeign Patent References
International ClassC23G 001/14AbstractAqueous alkaline cleaning solutions are used to remove metal intermediate length carboxylate salts from a solid substrate. Foaming of the aqueous alkaline cleaning solution can be adequately reduced by treating the anions of the metal intermediate length carboxylate salts with cations. The anions of the metal intermediate length carboxylate salts constitute a separate solid phase layer that be readily separated from the cleaning solution, resulting in a regenerated aqueous alkaline cleaning solution.Field of SearchFor metallic, siliceous, or calcareous basework, including chemical bleaching, oxidation or reductionIncluding regeneration, purification, recovery or separation of agent used By crystallizing, precipitating, or eliminating dissolved solids from used agent Using sequentially applied treating agents One a soap or an alkaline agent Free element component (e.g., metal, carbon, sulfur, etc.) With alkali metal hydroxide, carbonate, or bicarbonate component | |
