Sulfuric acid (H2SO4) is the most produced chemical in the world. It is widely used in all industries for the manufacture of different substances, and sold in the form of various solutions of H2SO4 in water or of sulfur trioxide (SO3) in H2SO4.
Vaisala K-PATENTS® Process Refractometer PR-43- G is used in various stages of the Contact Process. The refractometer monitors and controls the concentration of acid during drying, absorption and dilution steps to keep the concentration of H2SO4constant at 93, 98 or 104 % by weight.
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