Recovering heavy rare earth metals from magnet scrap

Ott, Ryan T.; McCallum, Ralph W.; Jones, Lawrence L.

Advanced Search OptionsAdvanced Search queries use a traditional Term Search. For more info, see our FAQ.

All Fields:

Patent Title:

Abstract:

Assignee:

Inventor(s):

Patent Number:

Patent Classification (CPC):

All Classifications
A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
A23 - foods or foodstuffs
A24 - tobacco
A41 - wearing apparel
A42 - headwear
A43 - footwear
A44 - haberdashery
A45 - hand or travelling articles
A46 - brushware
A47 - furniture
A61 - medical or veterinary science
A62 - life-saving
A63 - sports
A99 - subject matter not otherwise provided for in this section
B - performing operations
B01 - physical or chemical processes or apparatus in general
B02 - crushing, pulverising, or disintegrating
B03 - separation of solid materials using liquids or using pneumatic tables or jigs
B04 - centrifugal apparatus or machines for carrying-out physical or chemical processes
B05 - spraying or atomising in general
B06 - generating or transmitting mechanical vibrations in general
B07 - separating solids from solids
B08 - cleaning
B09 - disposal of solid waste
B21 - mechanical metal-working without essentially removing material
B22 - casting
B23 - machine tools
B24 - grinding
B25 - hand tools
B26 - hand cutting tools
B27 - working or preserving wood or similar material
B28 - working cement, clay, or stone
B29 - working of plastics
B30 - presses
B31 - making articles of paper, cardboard or material worked in a manner analogous to paper
B32 - layered products
B33 - additive manufacturing technology
B41 - printing
B42 - bookbinding
B43 - writing or drawing implements
B44 - decorative arts
B60 - vehicles in general
B61 - railways
B62 - land vehicles for travelling otherwise than on rails
B63 - ships or other waterborne vessels
B64 - aircraft
B65 - conveying
B66 - hoisting
B67 - opening, closing {or cleaning} bottles, jars or similar containers
B68 - saddlery
B81 - microstructural technology
B82 - nanotechnology
B99 - subject matter not otherwise provided for in this section
C - chemistry
C01 - inorganic chemistry
C02 - treatment of water, waste water, sewage, or sludge
C03 - glass
C04 - cements
C05 - fertilisers
C06 - explosives
C07 - organic chemistry
C08 - organic macromolecular compounds
C09 - dyes
C10 - petroleum, gas or coke industries
C11 - animal or vegetable oils, fats, fatty substances or waxes
C12 - biochemistry
C13 - sugar industry
C14 - skins
C21 - metallurgy of iron
C22 - metallurgy
C23 - coating metallic material
C25 - electrolytic or electrophoretic processes
C30 - crystal growth
C40 - combinatorial technology
C99 - subject matter not otherwise provided for in this section
D - textiles
D01 - natural or man-made threads or fibres
D02 - yarns
D03 - weaving
D04 - braiding
D05 - sewing
D06 - treatment of textiles or the like
D07 - ropes
D10 - indexing scheme associated with sublasses of section d, relating to textiles
D21 - paper-making
D99 - subject matter not otherwise provided for in this section
E - fixed constructions
E01 - construction of roads, railways, or bridges
E02 - hydraulic engineering
E03 - water supply
E04 - building
E05 - locks
E06 - doors, windows, shutters, or roller blinds in general
E21 - earth drilling
E99 - subject matter not otherwise provided for in this section
F - mechanical engineering
F01 - machines or engines in general
F02 - combustion engines
F03 - machines or engines for liquids
F04 - positive - displacement machines for liquids
F05 - indexing schemes relating to engines or pumps in various subclasses of classes f01-f04
F15 - fluid-pressure actuators
F16 - engineering elements and units
F17 - storing or distributing gases or liquids
F21 - lighting
F22 - steam generation
F23 - combustion apparatus
F24 - heating
F25 - refrigeration or cooling
F26 - drying
F27 - furnaces
F28 - heat exchange in general
F41 - weapons
F42 - ammunition
F99 - subject matter not otherwise provided for in this section
G - physics
G01 - measuring
G02 - optics
G03 - photography
G04 - horology
G05 - controlling
G06 - computing
G07 - checking-devices
G08 - signalling
G09 - education
G10 - musical instruments
G11 - information storage
G12 - instrument details
G16 - information and communication technology [ict] specially adapted for specific application fields
G21 - nuclear physics
G99 - subject matter not otherwise provided for in this section
H - electricity
H01 - basic electric elements
H02 - generation
H03 - basic electronic circuitry
H04 - electric communication technique
H05 - electric techniques not otherwise provided for
H99 - subject matter not otherwise provided for in this section
Y - new / cross sectional technologies
Y02 - technologies or applications for mitigation or adaptation against climate change
Y04 - information or communication technologies having an impact on other technology areas
Y10 - technical subjects covered by former uspc

More Options ...

Title: Recovering heavy rare earth metals from magnet scrap

Abstract

A method of treating rare earth metal-bearing permanent magnet scrap, waste or other material in a manner to recover the heavy rare earth metal content separately from the light rare earth metal content. The heavy rare earth metal content can be recovered either as a heavy rare earth metal-enriched iron based alloy or as a heavy rare earth metal based alloy.

Inventors:: Ott, Ryan T.; McCallum, Ralph W.; Jones, Lawrence L.

Issue Date:: Tue Aug 08 00:00:00 EDT 2017

Research Org.:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1374568

Patent Number(s):: 9725788

Application Number:: 14/545,994

Assignee:: Iowa State University Research Foundation, Inc.

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B22 - CASTING B22D - CASTING OF METALS

Show more

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D3/10 - Vacuum distillation
B01D7/00 - Sublimation

B - PERFORMING OPERATIONS B22 - CASTING B22D - CASTING OF METALS
B22D7/005 - {from non-ferrous metals}

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C22B23/00 - Obtaining nickel or cobalt
C22B59/00 - Obtaining rare earth metals
C22B7/001 - {Dry processes}
C22B7/006 - {Wet processes}
C22B9/003 - {by induction}
C22B9/02 - Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action {including acoustic waves
C22B9/103 - {Methods of introduction of solid or liquid refining or fluxing agents}

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C22C1/02 - by melting {
C22C19/007 - {with a light metal
C22C28/00 - Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
C22C33/04 - by melting

F - MECHANICAL ENGINEERING F27 - FURNACES F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
F27D11/06 - Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P10/20 - Process efficiency
Y02P10/25 - by increasing the energy efficiency of the process

Show less

DOE Contract Number:: AC02-07CH11358

Resource Type:: Patent

Resource Relation:: Patent File Date: 2015 Jul 15

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Ott, Ryan T., McCallum, Ralph W., and Jones, Lawrence L. Recovering heavy rare earth metals from magnet scrap.  United States: N. p., 2017. 
        Web.

Copy to clipboard


                    Ott, Ryan T., McCallum, Ralph W., & Jones, Lawrence L. Recovering heavy rare earth metals from magnet scrap.  United States.

Copy to clipboard


                    Ott, Ryan T., McCallum, Ralph W., and Jones, Lawrence L. Tue .  
        "Recovering heavy rare earth metals from magnet scrap".  United States.  https://www.osti.gov/servlets/purl/1374568.

Copy to clipboard


                    
@article{osti_1374568,

  title        = {Recovering heavy rare earth metals from magnet scrap},

  author       = {Ott, Ryan T. and McCallum, Ralph W. and Jones, Lawrence L.},

  abstractNote = {A method of treating rare earth metal-bearing permanent magnet scrap, waste or other material in a manner to recover the heavy rare earth metal content separately from the light rare earth metal content. The heavy rare earth metal content can be recovered either as a heavy rare earth metal-enriched iron based alloy or as a heavy rare earth metal based alloy.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Aug 08 00:00:00 EDT 2017},

  month        = {Tue Aug 08 00:00:00 EDT 2017}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Process for the preparation of pure alloys based on rare earths and transition metals by metallothermy
patent, August 1988

Jourdan, Alex
US Patent Document 4,767,455
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4767455

Scrap treatment method for rare earth transition metal alloys
patent, July 1992

Lyman, Jane W.; Palmer, Glenn R.
US Patent Document 5,129,945
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5129945

Leaching/flotation scrap treatment method
patent, August 1993

Lyman, Jane W.; Palmer, Glenn R.
US Patent Document 5,238,489
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5238489

Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction
patent, August 1995

Ellis, Timothy W.; Schmidt, Frederick A.
US Patent Document 5,437,709
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5437709

Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet
patent-application, June 2003

Hirota, Koichi; Minowa, Takehisa
US Patent Application 10/191279; 20030106615
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20030106615

Method and apparatus for recovery of rare earth element
patent-application, February 2011

Okabe, Toru; Shirayama, Sakae
US Patent Application 12/934112; 20110023660
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110023660

Process for extraction of rare earth elements
patent-application, October 2013

Lakshmanan, Vaikuntam; Sridhar, Ramamritham; Halim, M. A.
US Patent Application 13/858166; 20130283977
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20130283977

Method for producing metal by molten salt electrolysis and apparatus used for the production method
patent-application, October 2014

Awazu, Tomoyuki; Majima, Masatoshi
US Patent Application 14/355943; 20140291161
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140291161

Method for Separating and Recovering Rare-Earth Elements
patent-application, December 2014

Miyata, Motoyuki; Yamamoto, Hiroki; Sasaki, Hiroshi
US Patent Application 14/370666; 20140356258
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140356258

Processes for recovering rare earth elements and rare metals
patent-application, April 2015

Boudreault, Richard; Primeau, Denis; Krivanec, Heinz
US Patent Application 14/386133; 20150104361
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20150104361

Similar Records in DOE Patents and OSTI.GOV collections:

Recovering rare earth metals from magnet scrap

Patent Ott, Ryan T.; McCallum, Ralph W.

A method is provided for treating a rare earth metal-bearing scrap material by melting an extractant selected from the group consisting of bismuth (Bi) and lead (Pb) and contacting the melted extractant and the scrap material at a temperature and time to recover at least one of the light rare earth metal content and the heavy rare earth metal content as a metallic extractant alloy, which can be subjected to vacuum distillation or sublimation to recover the rare earth metal(s). The method can be practiced to recover the light rare earth metal content and the heavy rare earth metal contentmore » « less
Full Text Available
Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction

Patent Ellis, Timothy W [Ames, IA]; Schmidt, Frederick A [Ames, IA]

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 for a time effective to extract the rare earth from the melted material into the melted extractant. The rare earth metal is separated from the extractant metal by vacuum sublimation or distillation.
Full Text Available
Methods of recovering an elemental rare earth metal, and methods of forming a rare earth metal

Patent Case, Mary E.; Fox, Robert V.; Baek, Donna L.

A method of recovering an elemental rare earth metal comprises placing a rare earth-containing material comprising a rare earth metal in a reaction solution comprising a reducing agent and a non-aqueous solvent comprising an ionic liquid or a eutectic mixture, reducing the rare earth metal with the reducing agent to form a metallic rare earth metal and cations of the reducing agent, transferring the cations of the reducing agent from the reaction solution to an electrochemical cell through an ion exchange membrane, and reducing the cations of the reducing agent in the electrochemical cell. Related methods of forming an elementalmore » « less
Full Text Available
Rare earth-transition metal scrap treatment method

Patent Schmidt, Frederick A [Ames, IA]; Peterson, David T [Ames, IA]; Wheelock, John T [Nevada, IA]; ...

Rare earth-transition metal (e.g. iron) scrap (e.g. Nd-Fe-B scrap) is melted to reduce the levels of tramp oxygen and nitrogen impurities therein. The tramp impurities are reduced in the melt by virtue of the reaction of the tramp impurities and the rare earth to form dross on the melt. The purified melt is separated from the dross for reuse. The oxygen and nitrogen of the melt are reduced to levels acceptable for reuse of the treated alloy in the manufacture of end-use articles, such as permanent magnets.
Full Text Available
Method for treating rare earth-transition metal scrap

Patent Schmidt, Frederick A [Ames, IA]; Peterson, David T [Ames, IA]; Wheelock, John T [Nevada, IA]; ...

Rare earth-transition metal (e.g., iron) scrap (e.g., Nd-Fe-B scrap) is flux (slag) remelted to reduce tramp non-metallic impurities, such as oxygen and nitrogen, and metallic impurities, such as Li, Na, Al, etc., picked up by the scrap from previous fabrication operations. The tramp impurities are reduced to concentrations acceptable for reuse of the treated alloy in the manufacture of end-use articles, such as permanent magnets. The scrap is electroslag or inductoslag melted using a prefused, rare earth fluoride-bearing flux of CaF.sub.2, CaCl.sub.2 or mixtures thereof or the slag resulting from practice of the thermite reduction process to make a raremore » earth-iron alloy. « less
Full Text Available

Similar Records

Title: Recovering heavy rare earth metals from magnet scrap

Abstract

Citation Formats

Process for the preparation of pure alloys based on rare earths and transition metals by metallothermy patent, August 1988

Scrap treatment method for rare earth transition metal alloys patent, July 1992

Leaching/flotation scrap treatment method patent, August 1993

Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction patent, August 1995

Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet patent-application, June 2003

Method and apparatus for recovery of rare earth element patent-application, February 2011

Process for extraction of rare earth elements patent-application, October 2013

Method for producing metal by molten salt electrolysis and apparatus used for the production method patent-application, October 2014

Method for Separating and Recovering Rare-Earth Elements patent-application, December 2014

Processes for recovering rare earth elements and rare metals patent-application, April 2015

Process for the preparation of pure alloys based on rare earths and transition metals by metallothermy
patent, August 1988

Scrap treatment method for rare earth transition metal alloys
patent, July 1992

Leaching/flotation scrap treatment method
patent, August 1993

Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction
patent, August 1995

Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet
patent-application, June 2003

Method and apparatus for recovery of rare earth element
patent-application, February 2011

Process for extraction of rare earth elements
patent-application, October 2013

Method for producing metal by molten salt electrolysis and apparatus used for the production method
patent-application, October 2014

Method for Separating and Recovering Rare-Earth Elements
patent-application, December 2014

Processes for recovering rare earth elements and rare metals
patent-application, April 2015