Wet process phosphoric acid production process

Sulfuric acid and phosphoric acid concentration of online measurement and quality monitoring

Phosphoric acid (H₃PO₄) is through the adoption of wet or hot processing method of phosphate rock.80% of the world's phosphoric acid by wet process.Wet processes including reaction, filtration and concentration process.In a reaction container ground phosphate rock and use sulfuric acid acidification.Acidification process, the phosphate rock into phosphoric acid and calcium phosphate in a not soluble calcium sulfate salt (CaSO₄), i.e., gypsum.

Sulfuric acid concentration will affect the rate of acidification and gypsum crystallization process, must maintain between 93-98%.In addition, the control of the concentration of sulfuric acid can ensure that as much as possible to produce high strength
Acid product, and reduces the energy consumption of the evaporation stage.

Solids are separated in the filtering process and cleaning, compared with the 32% concentration of P₂O₅(is equal to about 50% concentration of H₃PO₄) phosphate.Finally, the evaporation acid to get P concentration was 54%₂O₅(the equivalent of 70% concentration of H₃PO₄) industrial-grade acid.Such as to phosphoric acid used in food, pharmaceutical and cosmetics industry, still need further refinement, obtain higher purity of the phosphoric acid.

Visa K - PATENTS^®Online refractometer helps

• Online real time measuring the concentration of sulfuric acid and phosphoric acid, eliminate the sampling requirements
• To ensure that only output a high concentration of phosphate, thereby reducing
• The energy consumption of evaporation stage
• Adjust the heat load ability of reaction vessel
• Control of gypsum crystallization process.Crystal size and shape of the desired state can improve the efficiency of filtering process, and to enhance the overall efficiency of the process.
• By monitoring the final concentration of the phosphoric acid to reduce the operation cost

Read the application instructions, detailed understanding of digital sensor technology and how to optimize the wet-process phosphoric acid production process.

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