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E-Waste Recycling Technologies - WIPO

• There has however been a large increase in patent activity concerning the recovery of rare earth metals as well as extraction or recovery of noble metals (i.e. gold, silver or platinum) from e-waste streams. • Recovery of rare earth metals not only is fast growing, but also is one of the most

Rare opportunity to recycle rare earths - Recycling Today

Jan 03, 2018· Recycling rare-earth metals is attractive for technical, financial and political reasons. In late 2010, China cut off exports of rare-earth metals to Japan in response to Japan's detention of a Chinese fishing trawler captain. The DOE established its Critical Materials Strategy in 2010 and its Critical Materials Institute (CMI) in 2013. CMI ...

Method and apparatus for extracting and removing rare ...

Apr 06, 2015· Justia Patents Rare Earth Metal (at. No. 21, 39, Or 57-71) US Patent for Method and apparatus for extracting and removing rare earth metal ions from plating solution Patent (Patent # 9,399,828) Method and apparatus for extracting and removing rare earth metal ions from plating solution . Apr 6, 2015 - SHIN-ETSU ...

Rare-earth element - Wikipedia

A rare-earth element (REE) or rare-earth metal (REM), as defined by the International Union of Pure and Applied Chemistry, is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium. Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as the lanthanides and ...

US5030424A - Recovery of rare earth ... - Google Patents

A process for the recovery of rare earth elements from Bayer Process red mud includes the following steps: (a) digesting red mud containing rare earth elements with a dilute acid solution, e.g. sulphur dioxide dissolved in water, to selectively dissolve the rare earth elements while leaving iron in the red mud substantially undissolved; (b) separating the solution obtained from the solid ...

Rare Earth Salts | Home | Supplying Global Innovation

Rare Earth Salts has generated patent pending technology that can revitalize the rare earth industry in the US and could potentially relocate hundreds of high technology companies back to the US. Furthermore, the patent pending process removes many of the environmentally damaging processes of current rare earth oxide refining, while greatly reducing the overall cost of refining the individual ...

Recovery Of Rare Earth Elements - Patent Lens

A process for recovering rare earth elements from a composite ore containing rare earth elements that includes a monazite group mineral and an apatite mineral, includes pre-leaching the composite ore with an acid so as to substantially dissolve the apatite mineral into the leach liquor and precipitating rare earth elements from the pre-leach liquor. The residue of the pre-leaching step is ...

PROCESS FOR REMOVING NOBLE METALS FROM URANIUM(Patent ...

doe patents patent: process for removing noble metals from uranium ... j b. process for removing noble metals from uranium. united states: n. p., 1961. web. copy to clipboard ... solvent extraction process for the recovery of uranium and rare earth metals from aqueous solutions.

Review of High-Temperature Recovery of Rare Earth …

Review of High-Temperature Recovery of Rare Earth (Nd/Dy) from Magnet Waste Muhamad Firdaus1 • M. Akbar Rhamdhani1 • Yvonne Durandet1 • W. John Rankin2 • Kathie McGregor2 Published online: 14 March 2016 The Minerals, Metals & Materials Society (TMS) 2016 Abstract Rare-earth metals, particularly neodymium,

Review on hydrometallurgical recovery of rare earth metals ...

Review on hydrometallurgical recovery of rare earth metals from various resources • Various leachants used to recover rare earths from primary and secondary resources • Solvent extraction studies using cationic, anionic, chelating, etc. extractants • Separation of rare earth metals from chloride, nitrate, phosphate, etc. solutions

Defense Metals Corp.: Rare Earth Metals Play with Tiny ...

If one talks about rare earth metals, the ones that come to mind are Nd, Pr and Dy. Earlier this year I asked Mr. Merriman about the dominance of select metals and, of course, China. He said: "China leads in production of both mined rare earth products and refined rare earth compounds, with Chinese production accounting for 86% of global ...

Gold(au) Recovered As Free Metal Patents and Patent ...

Dec 20, 2013· Systems embodying aspects of the present invention may be beneficial for recovering a variety of metals such as copper, gold, silver, nickel, cobalt, molybdenum, zinc, rhenium, uranium, rare earth metals, and platinum group metals from any metal-bearing material, such as …

US8968688B2 - Recovery of rare earth ... - Google Patents

Rare earth elements are recovered from coal ash. The coal ash with rare earth elements can be treated with a mineral acid to form an aqueous mineral acid solution. The aqueous mineral acid solution can be extracted to form an organic solution that includes the rare earth salts. The organic solution can be mixed with water to form an aqueous solution that includes the rare earth salts.

Tusaar | A Hold on Metals

We proudly hold one U.S. Patent and have two others pending. Our innovative research center is located in Lafayette, CO (Boulder County). Rare Earth Metals Extraction and Recovery

Extraction method of rare-earth metals from phosphogypsum

FIELD: metallurgy. SUBSTANCE: method involves oxidation of micro production wastes at temperature of 550-650°C in air atmosphere for destruction of crystal latitude Nd 2 Fe 14 B so that Fe 2 O 3, Nd 2 O 3, Fe 2 B is formed and moisture and oil is removed. Then, anhydrous fluorides of rare-earth metals are obtained and their metallothermic reduction is performed for production of constant magnets.

RECOVERY OF RARE EARTH METALS (REMs) FROM PRIMARY AND SECONDARY RESOURCES: A REVIEW 1Vinay Kumar*, 1Manis Kumar Jha, 1Archana Kumari, 1Rekha Panda, 2 J. Rajesh Kumar, 2 Jin Young Lee 1Metal ...

New Purdue technologies to extract, purify critical rare ...

The production of rare earth metals is a global $4 billion annual market that continues to grow as new electronics, computerized engines for aircraft, warships, electric automobiles, magnets and other critical products are developed that need rare earth metals to perform. The value of the products that require rare earth metals to function is valued at more than $4 trillion per year.

UK Researchers First to Produce High Grade Rare Earths ...

Nov 20, 2017· The achievement was made possible using a patent pending process developed by Honaker and Wencai Zhang and with funding provided by a U.S. Department of Energy Cooperative Agreement. "Our novel rare earth recovery process is low cost and more environmentally friendly than alternative technologies, such as solvent extraction," Honaker said.

Rare Earth Metals from Electric Motors | IUCRC

Mar 17, 2020· Sourcing uncommon minerals needed to make common products just got a whole lot easier. A research team at the Center for Resource Recovery and Recycling (CR3), one of the four research centers under Worcester Polytechnic Institutes (WPI) Metal Processing Institute, developed a simple, eco-friendly method for extracting so-called rare earth metals from old electric motors and …

Rare-Earth Metal Recovery for Green Technologies: Methods ...

Because of their rarity, utility, and importance, the recovery, utilization and recycling of rare earth metals is of utmost importance. This book presents both current methods of processing rare earths from primary and secondary sources and new, green routes for their isolation and purification.

Recovery of Rare Earth Elements - Google Patents

A process for recovering rare earth elements from a composite ore containing rare earth elements that includes a monazite group mineral and an apatite mineral, includes pre-leaching the composite ore with an acid so as to substantially dissolve the apatite mineral into the leach liquor and precipitating rare earth elements from the pre-leach liquor.

Membrane assisted solvent extraction for rare earth ...

Method of treating rare earth metal-bearing scrap, waste or other material (e.g. Nd--Fe--B or Dy--Tb--Fe scrap) to recover the rare earth metal comprising melting the rare earth metal-bearing material, melting a Group IIA metal extractant, such as Mg, Ca, or Ba, in which the rare earth is soluble in the molten state, and contacting the melted ...

Electronic waste is mined for rare earth elements

Aug 14, 2019· To date Bhave's recycling project has resulted in a patent and two publications (here and here) documenting recovery of three rare earth elements—neodymium, praseodymium and dysprosium—as a ...

Extraction processes and solvents for recovery of cesium ...

Method of treating rare earth metal-bearing scrap, waste or other material (e.g. Nd--Fe--B or Dy--Tb--Fe scrap) to recover the rare earth metal comprising melting the rare earth metal-bearing material, melting a Group IIA metal extractant, such as Mg, Ca, or Ba, in which the rare earth is soluble in the molten state, and contacting the melted material and melted extractant at a temperature and ...

WO2017158561A1 - Recovery of precious and rare earth ...

This invention relates to methods for the recovery of precious metals such as gold, silver, platinum, palladium and rare earths from precious metal-bearing materials. In particular, a method of purifying precious metal from a precious metal- bearing material comprising the steps a) forming an aqueous acidic oxidant mixture from hydrogen peroxide an acid and a source of bromide ion, said acidic ...

Recovering heavy rare earth metals from magnet scrap ...

Method of treating rare earth metal-bearing scrap, waste or other material (e.g. Nd--Fe--B or Dy--Tb--Fe scrap) to recover the rare earth metal comprising melting the rare earth metal-bearing material, melting a Group IIA metal extractant, such as Mg, Ca, or Ba, in which the rare earth is soluble in the molten state, and contacting the melted material and melted extractant at a temperature and ...