Method for the removal of impurities from sodium aluminate...

C - Chemistry – Metallurgy – 01 – F

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

23/239, 23/246

C01F 7/06 (2006.01) C01F 7/47 (2006.01)

Patent

CA 1111229

ABSTRACT OF THE DISCLOSURE Impurities such as organic substances, i.e. sodium oxalate and inorganic impurities, i.e. sodium salts of vanadium and phosphorus or double salts containing the latter sodium salts are removed from a sodium aluminate solution in the production of alumina from bauxite according to the Bayer process by adding sodium oxalate crystals or both sodium oxalate crystals and at least one of sodium salts of vanadium and phospho- rus, or double salts containing the latter sodium salts as seed to the sodium aluminate solution in the course of after the precipitation step of aluminum hydroxide to before the digestion step, thereby precipitating crystals of said impurities, separating the crystals of said impurities from the sodium aluminate solution, dissolv- ing about 10 to 50% by weight of the amount of the newly precipitated organic substances from the separated crystals of said impurities in an aqueous unsaturated sodium oxalate solution, and recyclically using the crystals resulting from the dissolution together with the resulting solution as seed for the precipitation of the impurities in the sodium aluminate solution. The impurities can be simply and effectively removed.

342116

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method for the removal of impurities from sodium aluminate... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for the removal of impurities from sodium aluminate..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the removal of impurities from sodium aluminate... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1026268

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.