Molybdenum oxide purification process

Details Molybdenum oxide purification process Molybdenum oxide purification process

C - Chemistry, Metallurgy

22

B

53/146

C22B 34/34 (2006.01)

Patent

CA 1053911

MOLYBDENUM OXIDE PURIFICATION PROCESS Abstract of the Disclosure A process for purifying concentrates of molybdenum oxide containing a variety of naturally-occurring contaminating metals, such as potassium, copper, calcium, magnesium, iron, aluminum, lead, Zinc, bismuth, and the like, as well as compounds thereof, by roasting the impure concentrate at an elevated temper- ature in an oxygen atmosphere to convert sub-oxides of molybdenum to molybdenum trioxide and contaminating metal molybdites to corres- ponding metal molybdates, which are extracted by a hot aqueous leaching of the concentrate and the solubilized molybdate ions are recovered. The aqueous leached concentrate, after separation from the aqueous leach solution, is leached with an ammoniacal leach solution for converting the molybdenum trioxide constituent therein into soluble ammonium molybdate compounds, and the resultant leach solution is removed from the remaining insoluble residue, which is discarded. The ammoniacal leach solution containing only minimal quantities of remaining contaminating metal ions can be further purified by passage through a chelating cation exchange resin, whereafter the ammonium molybdate compounds are recovered, such as by evaporative crystallization, to produce a high purity ammonium dimolybdate (ADM) product, or alternatively, can be calcined at an elevated temperature to produce a high purity mo- lybdenum trioxide product.

233747

Affiliated with

Also associated with

Rating

Molybdenum oxide purification process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Molybdenum oxide purification process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molybdenum oxide purification process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-861869