Abstract: A process for removal and recovery of chromium ions (chromate, dichromate, or combinations thereof) from aqueous waste water of surface treatment phosphatizing solutions and for recycling of the treated waste water following replenishment wherein the aqueous waste water is initially partially clarified in a settling tank, with the effluent then being passed through an ion exchange column for removal of substantially all of the chromium ions therefrom. Following treatment in the ion exchange resin column, the chromium-free material is recharged with a supply of fresh chromium ions until the chrome ion content is at the desired level for metal surface treatment. The spent ion exchange resin columns are removed and replaced, as necessary, with the recharge of the resin columns making additional chromium available as a resource.

Abstract: A preparation of an aqueous pre-treatment working solution for ferrous metals, wherein the composition includes in its formulation a composite alkaline builder including sodium hydroxide, sodium metasilicate, and sodium carbonate, water conditioners including sodium tripolyphosphate and tetrasodium ethylenediaminetetraacetate, a brightener consisting of alpha-sodium glucoheptonate dihydrate, a surfactant including a mixture of the sodium salt of petroleum sulfonic acid and linear ethoxylated alcohol organic phosphate ester complex, and a modified straight chain aliphatic polyether, and an emulsion coupling agent consisting of hexylene glycol. The formulation may be utilized at a temperature which is only very slightly or modestly elevated above ambient, and may be cooled so as to demulsify the soil retaining oils prior to disposal.

Abstract: A method and formulation for imparting a smooth finish to metallic components by subjecting the components to relative motion within a barrel or vibratory finishing machine, wherein the metallic components are immersed in a media which includes abrasive particles and an aqueous working solution of a metal finishing compound. The metal finishing compound includes a mixture of the tetrasodium salt of ethylenediaminetetraacetic acid, triethanolamine, the sodium salt of the amyl ester of sulfonated oleic acid (or the sulfate), together with a coco diethanolamine condensation amide modified with tallow fatty acid. The formulation is placed in aqueous solution, with the solution being capable of periodic or continuous partial removal for filtration to separate the aqueous solution from entrained abrasive particles.