Chromium recovery from high-temperature shift Cr-Fe catalysts
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields



Publication Date Range:


Document Data


Document Type:






Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page


Chromium recovery from high-temperature shift Cr-Fe catalysts

Filetype[PDF-737.85 KB]

  • English

  • Details:

    • Description:
      "The Bureau of Mines has devised a procedure to selectively extract and recover chromic oxide (cr2o3) from waste high-temperature shift catalysts that contain approximately 6 pct cr and 62 pct fe, both in oxide form. The Bureau's procedure consists of roasting the waste catalyst with sodium hydroxide (naoh) or sodium carbonate (na2co3), followed by water leaching. The chromium from the leach liquor was recovered utilizing an oxidation-reduction reaction with ph adjustment to form a hydrous chromic oxide (cr2o3.Xh2o) precipitate. The roast-leach procedure produced chromium extractions greater than 89.7 pct, with product recovery in excess of 99 pct from the leach liquor. The costs of the naoh and na2co3 roast processes, including sizing and equipment-related recommendations, were determined by the Bureau's office of process evaluation. The economic evaluation indicates that producing a cr2o3 product, at the present time, is not competitive with the present-day cost of imported chromites. The estimated average operating cost for both processes was $5.44/Lb of recovered cr2o3 concentrate. However, this procedure offers a potential alternative to the disposal of this waste through landfill." - NIOSHTIC-2

      NIOSHTIC no. 10006284

    • Document Type:
    • Main Document Checksum:
    • File Type:

    Supporting Files

    • No Additional Files

    More +

    You May Also Like

    Checkout today's featured content at