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Title: Method for magnesium sulfate recovery

Abstract

A method of obtaining magnesium sulfate substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7000 pCi/gm. The slag is ground to a particle size of about 200 microns or less. The ground slag is then contacted with a concentrated sulfuric acid under certain prescribed conditions to produce a liquid product and a solid product. The particulate solid product and a minor amount of the liquid is then treated to produce a solid residue consisting essentially of magnesium sulfate substantially free of uranium and having a residual radioactivity level of less than 1000 pCi/gm. In accordance with the preferred embodiment of the invention, a catalyst and an oxidizing agent are used during the initial acid treatment and a final solid residue has a radioactivity level of less than about 50 pCi/gm.

Inventors:
 [1];  [2]
  1. Canoga Park, CA
  2. Calabasas, CA
Issue Date:
Research Org.:
Rockwell International Corp., Canoga Park, CA (United States)
OSTI Identifier:
866353
Patent Number(s):
4689178
Assignee:
Rockwell International Corporation (El Segundo, CA)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
DOE Contract Number:  
AT03-83SF11948
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; magnesium; sulfate; recovery; obtaining; substantially; free; radioactive; uranium; slag; containing; radioactivity; level; 7000; pci; gm; ground; particle; size; 200; microns; contacted; concentrated; sulfuric; acid; prescribed; conditions; produce; liquid; product; solid; particulate; minor; amount; treated; residue; consisting; essentially; residual; 1000; accordance; preferred; embodiment; catalyst; oxidizing; agent; initial; treatment; final; 50; particulate solid; radioactivity level; slag containing; substantially free; consisting essentially; preferred embodiment; particle size; sulfuric acid; liquid product; solid residue; oxidizing agent; minor amount; solid product; concentrated sulfuric; magnesium sulfate; radioactive uranium; obtaining magnesium; oxidizing agen; /588/423/

Citation Formats

Gay, Richard L, and Grantham, LeRoy F. Method for magnesium sulfate recovery. United States: N. p., 1987. Web.
Gay, Richard L, & Grantham, LeRoy F. Method for magnesium sulfate recovery. United States.
Gay, Richard L, and Grantham, LeRoy F. Thu . "Method for magnesium sulfate recovery". United States. https://www.osti.gov/servlets/purl/866353.
@article{osti_866353,
title = {Method for magnesium sulfate recovery},
author = {Gay, Richard L and Grantham, LeRoy F},
abstractNote = {A method of obtaining magnesium sulfate substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7000 pCi/gm. The slag is ground to a particle size of about 200 microns or less. The ground slag is then contacted with a concentrated sulfuric acid under certain prescribed conditions to produce a liquid product and a solid product. The particulate solid product and a minor amount of the liquid is then treated to produce a solid residue consisting essentially of magnesium sulfate substantially free of uranium and having a residual radioactivity level of less than 1000 pCi/gm. In accordance with the preferred embodiment of the invention, a catalyst and an oxidizing agent are used during the initial acid treatment and a final solid residue has a radioactivity level of less than about 50 pCi/gm.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

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