Titrotherm system controls sulphate levels

Metrohm 859 Titrotherm system allows fast, accurate thermometric titration for control of sulphate in wet process phosphoric acid production.

With world food production at record levels and demand for crop-derived biofuels rising sharply, the production of phosphate-based fertilisers is booming.

In response, the price of phosphate rock has risen considerably and manufacturers of wet process phosphoric acid are under increasing pressure to maximise the efficiency of their processes.

A crucial factor in the production of phosphoric acid is the control of sulphate.

Sulphate levels must be controlled tightly and Metrohm's 859 Titrotherm thermometric titration system can play a critical role.

The previous methods have either been too slow and difficult to perform (classical gravimetry) or inaccurate and subject to interference (nephelometry).

Titrotherm's simple thermometric titration with barium chloride is fast, can be performed by process operators and meets industry requirements for precision and accuracy, according to Metrohm.

Titrations are generally complete within 30 seconds.

The method is suitable for automation with a Metrohm 814 Sample Processor.

Thermometric titration of sulphate is fast becoming the preferred method of analysis among US producers of phosphoric acid.

With Metrohm's global reach, the Metrohm 859 Titrotherm thermometric titration system is now available to manufacturers of wet process phosphoric acid worldwide.

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