Method for magnesium sulfate recovery
Abstract
A method is described for obtaining magnesium sulfate substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7,000 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 1,000 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:
- Issue Date:
- Research Org.:
- Rockwell International Corp
- OSTI Identifier:
- 7262217
- Patent Number(s):
- 4689178 A
- Application Number:
- PPN: US 6-798075
- Assignee:
- Rockwell International Corp., El Segundo, CA (United States) OAK; EDB-94-121718
- DOE Contract Number:
- AT03-83SF11948
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 14 Nov 1985
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; MAGNESIUM SULFATES; MATERIALS RECOVERY; SLAGS; RADIOACTIVE WASTE PROCESSING; URANIUM; ACID HYDROLYSIS; ACTIVITY LEVELS; CATALYSTS; COMMINUTION; OXIDIZERS; ACTINIDES; ALKALINE EARTH METAL COMPOUNDS; CHEMICAL REACTIONS; DECOMPOSITION; ELEMENTS; HYDROLYSIS; LYSIS; MAGNESIUM COMPOUNDS; MANAGEMENT; METALS; OXYGEN COMPOUNDS; PROCESSING; RADIOACTIVE WASTE MANAGEMENT; SOLVOLYSIS; SULFATES; SULFUR COMPOUNDS; WASTE MANAGEMENT; WASTE PROCESSING; 052001* - Nuclear Fuels- Waste Processing
Citation Formats
Gay, R.L., and Grantham, L.F. Method for magnesium sulfate recovery. United States: N. p., 1987.
Web.
Gay, R.L., & Grantham, L.F. Method for magnesium sulfate recovery. United States.
Gay, R.L., and Grantham, L.F. Tue .
"Method for magnesium sulfate recovery". United States.
@article{osti_7262217,
title = {Method for magnesium sulfate recovery},
author = {Gay, R.L. and Grantham, L.F.},
abstractNote = {A method is described for obtaining magnesium sulfate substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7,000 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 1,000 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 = {8}
}