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Title: System and method for concentrating rare earth elements from coal byproducts/slag

Abstract

The disclosure relates to a method for concentrating rare earth elements (REEs) from a coal byproduct. The method includes mixing the coal byproduct input with aluminum phosphate, sulfur and/or other compounds used as an additive; heating the coal byproduct input in air for a period of 3 minutes or longer at a temperature above a liquid starting temperature of the coal byproduct input, forming a molten coal byproduct; cooling the molten coal byproduct at a rate slower than critical glass transition cooling rate of the melt, forming REE phosphate product; heating the coal byproduct input above the liquid starting temperature of the coal byproduct after REE phosphate product is formed; and cooling the coal byproduct input at a rate faster than the critical glass transition cooling rate of the melt, minimizing forming unwanted solids.

Inventors:
; ;
Issue Date:
Research Org.:
U.S. Department of Energy, Washington, D.C. (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1568624
Patent Number(s):
10,358,694
Application Number:
15/790,636
Assignee:
U.S. Department of Energy (Washington, DC)
Resource Type:
Patent
Resource Relation:
Patent File Date: 10/23/2017
Country of Publication:
United States
Language:
English

Citation Formats

Nakano, Jinichiro, Nakano, Anna, and Bennett, James P. System and method for concentrating rare earth elements from coal byproducts/slag. United States: N. p., 2019. Web.
Nakano, Jinichiro, Nakano, Anna, & Bennett, James P. System and method for concentrating rare earth elements from coal byproducts/slag. United States.
Nakano, Jinichiro, Nakano, Anna, and Bennett, James P. Tue . "System and method for concentrating rare earth elements from coal byproducts/slag". United States. https://www.osti.gov/servlets/purl/1568624.
@article{osti_1568624,
title = {System and method for concentrating rare earth elements from coal byproducts/slag},
author = {Nakano, Jinichiro and Nakano, Anna and Bennett, James P.},
abstractNote = {The disclosure relates to a method for concentrating rare earth elements (REEs) from a coal byproduct. The method includes mixing the coal byproduct input with aluminum phosphate, sulfur and/or other compounds used as an additive; heating the coal byproduct input in air for a period of 3 minutes or longer at a temperature above a liquid starting temperature of the coal byproduct input, forming a molten coal byproduct; cooling the molten coal byproduct at a rate slower than critical glass transition cooling rate of the melt, forming REE phosphate product; heating the coal byproduct input above the liquid starting temperature of the coal byproduct after REE phosphate product is formed; and cooling the coal byproduct input at a rate faster than the critical glass transition cooling rate of the melt, minimizing forming unwanted solids.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}

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