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Case Study
Cytec Industries Inc.
Phosphoric acid producer reduces cadmium to under 4 ppm, attains
more than 100% ROI
Challenge
A producer of phosphoric acid had cadmium levels in its final 54
percent P2O5
acid (or “strong acid”) of 10.25 ppm. The producer
wanted to export its phosphoric acid to the European Union and
other parts of the world. However, it was unable to do so
because its cadmium levels were higher than the limits set by
international agricultural regulations.
To bring its product into compliance, the customer gave Cytec
the challenge of reducing cadmium to below 4 ppm. It further
required that the cadmium removal process not disrupt regular
operations, and be easy to implement.
Solution
Cytec applied its ACCO-PHOS®
800 reagent to the strong acid
before the filtration step. Dosages varied between 1 kg/tonne
and 3 kg/tonne of P2O5.
The cadmium in the strong acid formed a complex with gypsum and
was removed in the filtration process.
Results
Cytec met or exceeded all of the customer’s goals:
• Cadmium levels dropped to 3.95 ppm at 1 kg/tonne dosage, and
further to 2.25 ppm at 3 kg/tonne dosage.
• Cytec’s solution was easy to implement and did not disrupt
existing operations.
• The customer was able to vary dosages depending on the type of
phosphate rock and cadmium level, and still achieve desired
results.
• The customer could now successfully export its products. New
revenues from international markets generated a return on its
investment in ACCO-PHOS 800 reagent of more than 100 percent.
Your Cytec representative will be glad to evaluate your
processing operation and suggest reagent formulations that solve
production problems, increase yields, cut costs, and increase
overall efficiency.
What can Cytec do for you?
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