Class / Patent application number | Description | Number of patent applications / Date published |
075721000 | Utilizing organic reducing agent | 9 |
20100275734 | PURIFICATION OF 68GE/68GA GENERATOR ELUATE FROM FE(III) INTENDED TO IMPROVE SPECIFIC RADIOACTIVITY OF 68GA-BASED RADIOPHARMACEUTICALS - The present invention provides a method of purifying | 11-04-2010 |
20100288079 | Method for Recovering Catalytic Elements from Fuel Cell Membrane Electrode Assemblies - A method for recovering catalytic elements from a fuel cell membrane electrode assembly is provided. The method includes converting the membrane electrode assembly into a particulate material, wetting the particulate material, forming a slurry comprising the wetted particulate material and an acid leachate adapted to dissolve at least one of the catalytic elements into a soluble catalytic element salt, separating the slurry into a depleted particulate material and a supernatant containing the catalytic element salt, and washing the depleted particulate material to remove any catalytic element salt retained within pores in the depleted particulate material. | 11-18-2010 |
20110005354 | PROCESSES FOR RECOVERING METALS FROM AQUEOUS SOLUTIONS - Provided herein are processes for recovering molybdenum and/or other value metals (e.g., uranium) present in aqueous solutions from a large range of concentrations: from ppm to grams per liter via a solvent extraction process by extracting the molybdenum and/or other value metal from the aqueous solution by contacting it with an organic phase solution containing a phosphinic acid, stripping the molybdenum and/or other value metal from the organic phase solution by contacting it with an aqueous phase strip solution containing an inorganic compound and having a ≦1.0 M concentration of free ammonia, and recovering the molybdenum and/or other value metal by separating it from the aqueous phase strip solution. When the molybdenum and/or other value metal are present only in low concentration, the processes can include an organic phase recycle step and/or an aqueous phase strip recycle step in order to concentrate the metal prior to recover. | 01-13-2011 |
20110113927 | SEPARATION REAGENT OF PLATINUM GROUP METAL, METHOD FOR SEPARATING AND RECOVERING PLATINUM GROUP METAL, AND AMIDE-CONTAINING TERTIARY AMINE COMPOUND - The present invention provides a novel separation reagent capable of obtaining a high extraction % of rhodium in a chlorine-based acid solution, which has never existed heretofore, and a method for separating and recovering a platinum group metal using the same. An organic phase composed of an amide-containing tertiary amine separation reagent represented by the structural formula shown below is brought into contact with an acid solution containing a platinum group metal, thereby extracting rhodium, platinum and palladium with the organic phase. Among the metals extracted with the organic phase, rhodium is selectively back-extracted with a highly-concentrated hydrochloric acid solution, while palladium and platinum are back-extracted with a highly-concentrated nitric acid solution: | 05-19-2011 |
20120042752 | TEREPHTHALIC ACID PURGE FILTRATION RATE BY CONTROLLING % WATER IN FILTER FEED SLURRY - The process relates improving the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid, while utilizing pressure filtration. | 02-23-2012 |
20120137830 | METHOD FOR EXTRACTING HEXAVALENT CHROMIUM IN A POLYMER MATERIAL - One embodiment of method for extracting hexavalent chromium includes preparing a liquid sample by adding a fatty acid to a polymer material, adding water or an aqueous alkali solution to this sample, and extracting hexavalent chromium contained in the sample in the water or the aqueous alkali solution. | 06-07-2012 |
20130247718 | Methods Of Metal Extraction Using Oximes - Provided are methods method of recovering metal from an aqueous solution, the method comprising contacting an aqueous solution containing at least two metals selected from molybdenum, cobalt, nickel, zinc and iron with an organic solvent and an oxime-containing reagent composition at a predetermined pH, the predetermined pH selected to provide a high first metal extraction and a low second metal extraction; and separating the first metal from the solution. | 09-26-2013 |
20150368750 | SYSTEMS AND METHODS FOR THE HYDROMETALLURGICAL RECOVERY OF LEAD FROM SPENT LEAD-ACID BATTERIES AND THE PREPARATION OF LEAD OXIDE FOR USE IN NEW LEAD-ACID BATTERIES - The present disclosure relates generally to recycling lead-acid batteries, and more specifically, relates to purifying and recycling the lead content from lead-acid batteries. A lead recovery system includes a first reactor configured to receive and mix a lead-bearing material and a first carboxylate source to yield a first mixture, wherein the first mixture includes a first lead carboxylate that is dissolved in a liquid component of the first mixture. The system includes a second reactor configured to receive and mix the liquid component of the first mixture and a second carboxylate source to yield a second mixture, wherein the second mixture includes solid particles of a second lead carboxylate. The system includes a third reactor configured to receive and mix the solid particles of the second lead carboxylate and a hydroxide solution to yield a third mixture, wherein the third mixture includes solid particles of lead oxide. | 12-24-2015 |
20220136079 | METHOD OF EXTRACTING METAL IONS FROM BATTERIES - The present disclosure refers to a method of obtaining metal ions from a battery, the method comprising adding a crushed battery to a leaching solution comprising fruit and organic acid, thereby obtaining a leachate comprising metal ions, wherein the method is performed at a temperature above 80° C. | 05-05-2022 |