3results about How to "Avoid competitive adsorption" patented technology

This invention relates to the field of adsorption separation technology, specifically to an adsorbent for selectively adsorbing organic esters from industrial wastewater and its preparation method. The adsorbent contains polar functional groups capable of adsorbing organic esters and does not contain hydroxyl or carboxyl groups; the adsorbent's adsorption capacity for organic esters is not less than 12% of its total weight, and the density of the adsorbent is 0.5-1.2 g·cm³. ‑3 The adsorbent of this invention contains abundant polar functional groups, exhibiting strong selectivity for organic esters. This effectively avoids competitive adsorption of other molecules in the solution at the active sites, thus improving the purity of the recovered product. Under high liquid hourly space velocity (HLH), the adsorbent of this invention can purify the concentration of organic esters in the solution to below 1000 ppm.

This invention discloses a rapid flotation process for efficiently recovering coarse copper slag, comprising the following steps: (1) crushing and ball milling the copper slag, adding grinding aids and oxidants during grinding to obtain the slurry required for rapid flotation; (2) adding collectors and frothers for rapid flotation to obtain coarse copper sulfide; (3) adding modifiers, collectors and frothers to the remaining slurry for flotation, combining the roughing product and the coarse copper sulfide obtained by rapid flotation into copper concentrate; (4) continuing to add modifiers, collectors and frothers to the remaining roughing slurry for flotation, returning the middlings obtained by scavenging to the roughing operation, and filtering and drying the remaining slurry as tailings. This invention improves the liberation of copper slag and the physicochemical properties of the surface of copper-containing particles in the slag by adding grinding aids and oxidants. Rapid flotation can recover a portion of copper sulfide concentrate before roughing, increasing the recovery efficiency of fine copper particles in subsequent operations.

This invention discloses a method for applying hydrothermally loaded carbon oxalate ore to heavy metal adsorption. This method is the first to discover the role of hydrothermally loaded carbon oxalate ore in the adsorption of arsenic and cadmium, and particularly reveals its synergistic adsorption effect on arsenic and cadmium. Specifically, the presence of arsenic promotes the adsorption of cadmium. This invention avoids competitive adsorption between cadmium and arsenic, exhibiting high adsorption capacity for both, providing a new approach for the rapid and efficient simultaneous treatment of arsenic and cadmium in water.