Processing of solid and liquid technogenic wastes containing toxic Chromium (VI) and Chromium (III)

Chromium Compounds and Catalysts: Environmental Implications

Cr(VI) pollution is a major global concern due to its long-lasting impact on the environment and its danger to living beings. Its widespread industrial use makes it highly toxic and a common environmental issue.

Production of chromium compounds, as well as usage of chromium-containing catalysts (e.g., in the petrochemical industry), pose huge environmental challenges. The hazardous waste materials containing toxic chromium compounds—Cr(VI) and Cr(III)— are recognized as some of the most harmful industrial waste materials. These highly toxic wastes require mandatory neutralization and disposal. 

Why Traditional Methods Fall Short in Chromium (VI) and Chromium (III) Recycling 

• Conventional technologies of recycling and neutralization of the toxic chromium waste are very complex and ineffective, require substantial energy, reagents and equipment: 
• Many known methods generate waste byproducts or require the use of chemicals that can create secondary pollution issues. For example, Cr (VI) and Cr (III) is often can be effectively extracted only in high concentrations, leaving low concentrated residual of diluted compounds in the sludge storages and harming the environment. 
• Proper handling and disposal of these byproducts drive up costs and reduce the overall effectiveness of recycling efforts. 

We offer a unique and revolutionizing Chromium compound disposal technology 

Our innovation enables complete dechroming (Cr(VI) removal) from technogenic waste to permissible levels and facilitates extraction of chromium in the form of valuable and marketable Cr(VI) and Cr(III) compounds. 

Key Features and Advantages of the ChemReclaim Technology: 

• Capability to remove Cr(VI) from waste to permissible levels.
• Conversion of insoluble Cr(III) into water-soluble Cr(VI) without autoclaves, under atmospheric pressure, and at a low temperature. 
• Ability to increase the concentration of the target component by tens or hundreds of times: elevating Cr(VI) concentration in aqueous solutions from 0.01 g/l to 50-200 g/l without evaporation.
• Low reagent consumption with reagent losses of max. < 3-5%. Reagent recycling. 
• Employing cost-effective carbon steel for the technological equipment.
• Chromium extraction efficiency from solutions and solid waste:
  • Cr(VI): 99.9-99.99%;
  • Cr(III): 80-99.5%.
• Generating a wide range of highly marketable and high purity products (99.5-99.95%) from the toxic waste, e.g.: 
  • Potassium chromate (K₂CrO₄) or sodium chromate (Na₂CrO₄);
  • Potassium dichromate (K₂Cr₂O₇) or sodium dichromate (Na₂Cr₂O₇) ,
  • Сhromium(VI) oxide (CrO₃), 
  • Chromium(III) oxide (Cr₂O₃).
• Economical processing with low production costs.
• Environmental safety: No toxic emissions into the environment.

Furthermore, the metals obtained from catalyst recycling can be utilized to produce new catalysts and ultra-dispersed powders of rare metals.

Contact us to explore how our technologies can support your business.