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Title: Process for the purification of solutions containing alkali metal carbonate, sulphate, hydroxide or possibly hydrogen carbonate, and one at least of the metals vanadium, uranium and molybdenum

Abstract

A process is claimed for extracting molybdenum from aqueous solutions containing alkali metal carbonate, sulphate, hydroxide or hydrogen carbonate and, primarily, one at least of the metals belonging to the group formed by vanadium, uranium and molybdenum, in the form of alkali metal salts, and mineral and/or organic impurities. The said solutions result from an ore attack cycle and are taken off after extraction of the metal being sought, in the form of a concentrate. These said solutions are caustified by the addition of a suitable amount of lime, converting the carbonate present into alkali metal hydroxide. A first precipitate is separated from the alkali metal hydroxide-rich liquor, and the said liquor is concentrated until the alkali metal hydroxide content is at most equal to 50%, to cause the production of a second precipitate formed by alkali metal sulphate and molybdate, which is solubilized in an aqueous recycle liquor. The said re-dissolution liquor is then treated with sulphide ions and then acidified to give a pH-value of lower than 4.5, in order to quantitatively precipitate the molybdenum which is separated from the mother liquor, washed and dried for use as a source of molybdenum.

Inventors:
;
Publication Date:
OSTI Identifier:
6800060
Patent Number(s):
US 4423013
Assignee:
Aluminium Pechiney (France)
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 2 Apr 1980, France; Other Information: PAT-APPL-246405
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; MOLYBDENUM; DISSOLUTION; PRECIPITATION; SOLVENT EXTRACTION; PROCESS SOLUTIONS; DEMETALLIZATION; URANIUM; VANADIUM; ACIDIFICATION; ALKALI METAL COMPOUNDS; CARBONATES; HYDROGEN COMPOUNDS; HYDROXIDES; MATERIALS RECOVERY; MOLYBDATES; PURIFICATION; SULFATES; URANIUM COMPOUNDS; URANIUM ORES; ACTINIDE COMPOUNDS; ACTINIDES; CARBON COMPOUNDS; DISPERSIONS; ELEMENTS; EXTRACTION; MANAGEMENT; METALS; MIXTURES; MOLYBDENUM COMPOUNDS; ORES; OXYGEN COMPOUNDS; PROCESSING; RECOVERY; SEPARATION PROCESSES; SOLUTIONS; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTE PROCESSING; 050400* - Nuclear Fuels- Feed Processing; 400105 - Separation Procedures

Citation Formats

Maurel, P, and Nicolas, F. Process for the purification of solutions containing alkali metal carbonate, sulphate, hydroxide or possibly hydrogen carbonate, and one at least of the metals vanadium, uranium and molybdenum. United States: N. p., 1983. Web.
Maurel, P, & Nicolas, F. Process for the purification of solutions containing alkali metal carbonate, sulphate, hydroxide or possibly hydrogen carbonate, and one at least of the metals vanadium, uranium and molybdenum. United States.
Maurel, P, and Nicolas, F. 1983. "Process for the purification of solutions containing alkali metal carbonate, sulphate, hydroxide or possibly hydrogen carbonate, and one at least of the metals vanadium, uranium and molybdenum". United States.
@article{osti_6800060,
title = {Process for the purification of solutions containing alkali metal carbonate, sulphate, hydroxide or possibly hydrogen carbonate, and one at least of the metals vanadium, uranium and molybdenum},
author = {Maurel, P and Nicolas, F},
abstractNote = {A process is claimed for extracting molybdenum from aqueous solutions containing alkali metal carbonate, sulphate, hydroxide or hydrogen carbonate and, primarily, one at least of the metals belonging to the group formed by vanadium, uranium and molybdenum, in the form of alkali metal salts, and mineral and/or organic impurities. The said solutions result from an ore attack cycle and are taken off after extraction of the metal being sought, in the form of a concentrate. These said solutions are caustified by the addition of a suitable amount of lime, converting the carbonate present into alkali metal hydroxide. A first precipitate is separated from the alkali metal hydroxide-rich liquor, and the said liquor is concentrated until the alkali metal hydroxide content is at most equal to 50%, to cause the production of a second precipitate formed by alkali metal sulphate and molybdate, which is solubilized in an aqueous recycle liquor. The said re-dissolution liquor is then treated with sulphide ions and then acidified to give a pH-value of lower than 4.5, in order to quantitatively precipitate the molybdenum which is separated from the mother liquor, washed and dried for use as a source of molybdenum.},
doi = {},
url = {https://www.osti.gov/biblio/6800060}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 27 00:00:00 EST 1983},
month = {Tue Dec 27 00:00:00 EST 1983}
}